TM_9-2350-373-10-2(PMCS)

CHAPTER 4

MAINTENANCE INSTRUCTIONS

WORK PACKAGE INDEX

Title WP Sequence No.PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INTRODUCTION . . . . 0088 00PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) . . . . . . . . . . . . 0089 00CLEAN/INSPECT SMOKE GRENADE LAUNCHERS. . . . . . . . . . . . . . . . . . . 0090 00CLEAN/INSPECT TOW LAUNCHER . . . . . . . . . . . . . . . . . . . . . . . . . . 0091 00REMOVE COAX MACHINE GUN . . . . . . . . . . . . . . . . . . . . . . . . . . . 0092 00CLEAN/INSPECT/LUBRICATE COAX MACHINE GUN . . . . . . . . . . . . . . . . . . 0093 00INSTALL COAX MACHINE GUN. . . . . . . . . . . . . . . . . . . . . . . . . . . . 0094 00REMOVE 25MM GUN BARREL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0095 00CLEAN/INSPECT/LUBRICATE 25MM GUN BARREL. . . . . . . . . . . . . . . . . . . 0096 00INSTALL 25MM GUN BARREL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0097 00REMOVE 25MM GUN FEEDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0098 00CLEAN/INSPECT/LUBRICATE 25MM GUN FEEDER . . . . . . . . . . . . . . . . . . 0099 00INSTALL 25MM GUN FEEDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0100 00REMOVE 25MM GUN RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . 0101 00CLEAN/INSPECT/LUBRICATE 25MM GUN RECEIVER . . . . . . . . . . . . . . . . . 0102 00INSTALL 25MM GUN RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . 0103 00REMOVE TRACK AND BOLT ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . 0104 00DISASSEMBLE TRACK AND BOLT ASSEMBLY. . . . . . . . . . . . . . . . . . . . . 0105 00CLEAN/INSPECT/LUBRICATE TRACK AND BOLT ASSEMBLY . . . . . . . . . . . . . . 0106 00ASSEMBLE TRACK AND BOLT ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . 0107 00INSTALL TRACK AND BOLT ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . 0108 00REMOVAL/DISASSEMBLY/ASSEMBLY/INSTALLATION OF THE POWER LINE PROTECTIONKIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0109 00

CLEAN TARGET ACQUISITION SYSTEM (TAS). . . . . . . . . . . . . . . . . . . . . 0110 00CLEAN ARMORED COMMANDER�S SHIELD (ACS) . . . . . . . . . . . . . . . . . . . 0111 00REPLACE ARMORED COMMANDER�S SHIELD (ACS) . . . . . . . . . . . . . . . . . 0112 00INSPECT/SERVICE TURRET EMERGENCY BATTERY . . . . . . . . . . . . . . . . . 0113 00CLEAN COMMANDER�S SMART DISPLAY (CSD) 2A801. . . . . . . . . . . . . . . . . 0114 00REMOVE/INSTALL COMMANDER�S SMART DISPLAY UNIT HARD DRIVE . . . . . . . . 0115 00REMOVE/INSTALL DEFENSE ADVANCED GLOBAL POSITIONING SYSTEM (GPS) RECEIVER(DAGR). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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TM 9-2350-373-10-2 0088

OPERATOR INSTRUCTIONS

PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) INTRODUCTION

Warnings and Cautions

Always observe the WARNINGs and CAUTIONs appearing in your PMCS tables BEFORE, DURING, and AFTERyou operate the equipment. The WARNINGs and CAUTIONs appear before certain procedures. You must observethese WARNINGs and CAUTIONs to prevent serious injury to yourself and others or prevent damage to equipment.

Explanation of Table Entries

1. Item Number Column - Numbers in this column are for reference. When completing DA Form 2404(Equipment Inspection and Maintenance Work Sheet), include the item number for the check/serviceindicating a fault. Item numbers also appear in the order that you must do the checks and servicesfor the intervals listed.

2. Interval Column - This column tells you when you must do the procedure in the procedure column.BEFORE procedures must be performed prior to the equipment leaving its containment area or performingits mission. DURING checks are performed by the commander/gunner per the PMCS tables to monitorand identify faults in equipment performance during the mission. AFTER procedures are performed perthe PMCS table at the conclusion of the mission to identify and correct faults which will preclude the nextmission. WEEKLY as well as BEFORE PMCS procedures must be performed if:

You are the assigned crewmember and have not operated the turret since the last WEEKLY.

You are operating the turret for the rst time.

When a check and service procedure is required for both WEEKLY and BEFORE intervals, it is notnecessary to do the procedures twice.

3. Item to be Checked or Serviced Column - This column identies the item to be checked or serviced.

4. Procedure Column - This column gives the procedure you must do to check or service the item listed in theitem to be checked or serviced column to know if the equipment is ready or available for its intended missionor for operation. You must do the procedure at the time stated in the interval column. Carefully follow theseinstructions. If you do not have the tools, or if the procedure tells you to, have eld maintenance do the work.

5. Equipment Not Ready/Available If: Column - Information in this column tells you what faults will keepyour equipment from being capable of performing its primary mission. If you make check and serviceprocedures that show faults listed in this column, do not operate the equipment. Follow standard operatingprocedures for maintaining the equipment or reporting equipment failure.

Other Table Entries

Information other than WARNINGs, CAUTIONs, and NOTEs appear in the PMCS table. Be sure to observe allspecial information appearing in the table.

PMCS General Instructions

Tools/Materials

When you do your PMCS, take along the tools you will need to make all the checks. You will always need wipingrags (WP 0125 Item 20).

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TM 9-2350-373-10-2 0088

Cleaning

Keep the turret clean. Dirt, grease, oil, and debris only get in the way, and may cover up a serious problem.Clean your turret as you work and as needed. If you clean the turret or weapons, be sure to observe the following:

NOTE

Turret electrical motors may overheat when operating under severe conditions. If DRIVE MALFannunciator light comes on, recycle turret drive system. If light comes on again, shut downturret power and wait for at least 3 minutes. If light comes on again, notify eld maintenance.

Use cleaning solvent (WP 0125 Item 7) on metal surfaces. Use scrubbing soap and water when you cleanrubber or plastic surfaces. Use isopropyl alcohol (WP 0125 Item 12) and clean water or lens cleaning solution(WP 0125 Item 13) when you clean optical surfaces.

General Inspection

NOTE

Inspection does not apply to gun elevation drive, preload, nut, or traverse drive mountinghardware. These have preset values.

Hardware: Check bolts, nuts and screws for looseness and missing, bent, or broken parts. If you nd a loose one,tighten it. If you can�t tighten, notify eld maintenance. Look for chipped paint, bare metal, or rust around bolt heads.

Welds: Look for loose or chipped paint, rust, cracks, or gaps where parts are welded together. If you nd a badweld, notify eld maintenance.

NOTE

Connectors on traverse drive should be hand tightened only.

Electrical wires and connectors: Look for cracked or broken insulation, bare wires, and loose or brokenconnectors. Tighten loose connectors. Make sure wires are in good shape, If you nd cracked or broken insulation,bare wires, or broken connectors, notify eld maintenance.

Straps: Look for hold down straps that are cracked, broken, or hardened. Look for webbing stowage straps thatare frayed, worn, or have missing metal ends. If you nd any bad straps, notify eld maintenance.

Hazardous Waste

When servicing this vehicle, performing maintenance, or disposing of materials such as engine coolant,transmission uid, lubricants, batteries, battery acid, or CARC paint, consult your Unit/local hazardous wastedisposal center or safety ofce for local regulatory guidance. If further information is needed, please contact theArmy environmental hotline at 1-800-872-3845. Improper disposal of this material may result in damage toenvironment or injury to personnel.

END OF WORK PACKAGE

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PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)

INITIAL SETUP:

Materials/PartsLint-free cloth, (Item 6, WP 0125)Cleaning solvent, (Item 7, WP 0125)Isopropyl alcohol, (Item 12, WP 0125)Lens cleaning solution, (Item 13, WP 0125)Lens paper, (Item 14, WP 0125)Wiping rag, (Item 20, WP 0125)Clean water

Personnel RequiredGunner (G)Commander (C)Helper (H)

ReferencesAR 385-10DA Form 2404DA Form 2408-4TM 9-1005-313-10TM 9-2350-373-10-1TM 11-5820-1172-13TM 11-5825-291-13TM 11-5830-263-10TM 11-6665-251-10

Equipment ConditionVehicle parked (TM 9-2350-373-10-1)Turret shut down (WP 0053)

PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR THE M2/M3 ODS SA TURRET � BEFORE

ITEMNO.

INTERVALITEM TO BE

CHECKED ORSERVICED PROCEDURE

EQUIPMENTNOT READY/

AVAILABLE IF:1 Before TURRET

INTERIORGUNNER

Check turret interior for damage, obstruction,and operational condition.

2 Before TURRETTRAVEL LOCK

1. Check that turret travel lock is notdamaged or broken.

Turret travel lockdoes not engageand lock turret indesired position.

TRAVELLOCK

LEVER

Figure 1. Turret Lock Lever.

2. Operate travel lock lever and make surethat it is engaged.

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PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) � (Continued)

ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:3 Before COMBAT

OVERRIDESWITCH

GUNNER

WARNING

Combat override disables safety interlocks.Soldiers can be killed or seriously injuredwithout safety interlocks working.

Do not activate combat override unlessturret shield door, driver�s hatch, and cargohatch are closed. Do not activate combatoverride unless in COMBAT and hatchswitches have received battle damage.

NOTE

When combat override is active, COMBATOVRD annunciator light on the systemcontrol box is lit and COMBAT OVERRIDEappears at the bottom of IBAS and CIVvideo. When either cargo or driver�s hatchor turret door is open, and combat overrideis active, the OPEN HATCH annunciatorlight on the system control box ashes.

Check that COMBAT OVERRIDE switchguard is closed and secured with anantipilferage seal. If switch guard is damagedor missing or if seal is broken, notify eldmaintenance.

Combatoverride switchantipilferageseal is missing.

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PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) � (CONTINUED)

ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

Figure 2. Combat Override Switch and Antipilferage Seal.

4 Before BALLISTICSIGHT SHIELDDOORS ANDACTUATORHANDLES

1. Open ballistic sight shield doors by takingactuator handles out of closed lockingdetent and turning actuator handles toopen locking detent.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

Figure 3. Day/Night Sight Actuator Handle.

2. Check that both ballistic sight shielddoors open.

Ballistic sightshield doors donot open.

5 Before TASWINDOWS

GUNNER

CAUTION

Coating on TAS windows can be damagedby tools, metal objects, and abrasivematerials. Use caution when inspecting orcleaning the window surfaces. Do not useany cleaning solvent, paper, or cloth that isnot specically approved for cleaning thesewindows.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:Check if TAS windows are dirty, broken, orseverely scratched. Clean dirty windows(WP 0110).

TAS windowsare broken orscratched sothat viewing thetarget area is notpossible.

TASWINDOWS

Figure 4. TAS Windows.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:6 Before 25MM GUN

SYSTEMWARNING

Accidental ring of weapons can kill orseriously injure personnel.

Set manual safety to SAFE. Ensure that allweapons are unloaded.

WARNING

25mm gun ring produces toxic materialsthat can injure soldiers. If 25mm gun coveris missing, damaged, or open, soldiers willbe exposed to toxic materials during 25mmgun ring.

Make sure gun cover is installed and closedbefore ring 25mm gun in powered mode.

If tactical situation permits, minimize ring25mm gun in manual mode and opengunner�s and commander�s hatches toimprove ventilation.1. Remove 25mm gun guard and open gun

cover. Check 25mm gun system for dirtand damage.

Gun coveror zipper isdamaged ormissing.

2. Check gun cover, zippers, and boltposition indicator for dirt and damage.If any are damaged, notify eldmaintenance.

3. Move manual safe handle to safeposition.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

GUNCOVER

ZIPPER

Figure 5. Gun Cover and Zipper.

4. If bolt position indicator is dirty, wipe withclean, lint-free cloth.

Gun powercable is cut ordamaged.

RIF

E BOLTPOSITIONINDICATOR

Figure 6. Bolt Position Indicator.

5. Check that gun power cable on 25mmgun is attached and not damaged.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

Figure 7. Gun Power Cable.

6. Check that connector locking ring isattached and locked.

7 Before FBCB2 PREOPCHECK

1. Check/service FBCB2 as follows:

a. Ensure Appliqué+CPU installed andsecurely mounted.

b. Ensure CB1 switch is turned on.c. Ensure all cables are connected.d. Ensure INC/VAA circuit breaker is on.e. Clean CSD and keyboard with soft,

water-damp rag.f. Verify cooling ns on CPU and rear of

display are not dirty or blocked.8 Before ARMORED

COMMANDER�SSHIELD (ACS)

1. Inspect commander�s shield for loose,missing, cracked, or damaged parts. Ifballistic window is damaged, refer to WP0115.

Missing, bent,warped, or crackedframes or supports.Mounting hardwaredamaged ormissing.

Cracks, holes, orother damage.

If visual clarityis reduced 50percent.

2. Inspect debris shield for cracks, holes,missing shields, or broken shields.Replace debris shield if missing, broken,cracked, or has sustained other damage.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:3. Remove debris shield from ballistic

window. See WP 0115.4. Inspect ballistic window for cracks,

holes, or damage. If ballistic window isdamaged, refer to WP 0115.

Cracks, holes,or otherdamage.

5. Inspect ballistic window and debris shieldseparately and together for degree ofvisual clarity, and for visual impairmentresulting from scratches or damage. Ifballistic window is damaged, refer to WP0115.

If visual clarityis reduced 50percent.

6. Inspect ACS for dirt, oil, grease, ordebris. If ACS is dirty, oily, greasy, orhas debris, see cleaning instructions(WP 0111).

7. Reinstall debris shield. See WP 0115.9 Before POWER UP WARNING

Soldiers may be killed or injured by movingvehicle or turret.

Ensure all personnel are clear of vehicleand turret before turning on vehicle masterpower, turret power, or starting engine.

CAUTION

Ensure engine is started before turning onradios. Damage to radios will result if theyare on when vehicle is started.1. Have driver start engine. See

TM 9-2350-373-10-1.

NOTE

If turret does not power up after threeminutes, cycle turret power by movingTURRET POWER and EMERGENCYshutdown switches to OFF and back toON.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:2. Turn TURRET POWER switch ON.

Check that TURRET POWER indicatorlight comes on.

Figure 8. TURRET POWER Switch.

3. Have driver check DTD display foroperation. If display does not work, notifyeld maintenance.

4. Check that SCB, GSCP, CSCP, and CSDback lighting comes on.

SCB, GSCP,CSCP, and CSDback lightingdoes not comeon.

5. (D) Have driver check DTD for TURRETPOWER indicator ON.

TURRETPOWERindicator doesnot shot TurretPower ON.

6. Have driver check DTD for operation.If display does not work, notify eldmaintenance.

7. Check that SCB, GSCP, and CSD backlighting comes on.

8. (C) Adjust PNL LIGHT DIMMER knob asneeded. Adjust CSD back lighting anddisplay with CSD brightness keys.

Backloggingbrightnesscannot beadjusted.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

Figure 9. PNL Light Dimmer and CSD Display.

9. (C) (G) Turn PNL LIGHT DIMMER knobfully clockwise past detent. Check that allindicator and annunciator lights on SCB,GSCP, and CSCP come on. (C) TurnDIMMER knob back over detent andadjust panel back lighting as needed.

All indicator andannunciatorlights on SCBdo not comeon when PNLLIGHT DIMMERknob is turnedfully counter-clockwise.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

WARNING

Turret can rotate and severely injure or killyou. Do not reach through turret shieldopening when turret power is on. Keepturret shield door closed whenever turretdrive power is on. Engage turret travel lockbefore moving or reaching through turretshield opening.

10.Move TURRET DRIVE switch on SCBto ON. Check that DRIVE indicatorlight comes on and that two turret drivewarning lights in step area come on (twored glows on turret door).

DRIVE indicatorlight does notcome on.

Figure 10. TURRET DRIVE Switch.

10 Before COMMSYSTEMPOWER UP

1. (C) Turn communication system power onas follows:

a. Move POWER/CB1 switch onSINCGARS Vehicle Amplier Adapterto ON.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

STBY Z -F H

PWR

ANT

PT Z

T DRVCT

COM SECHUB

LOW

HUB

AUD/FILL

AUD/DATAERF

STOLO AD

CLR

CHG

DAT A

CM SC O SYNC

LOUT

STBY Z -F H

PWR

ANT

PT Z

T DRVCT

COM SECHUBLOW

HUB

AUD/FILL

AUD/DATAERF

STOLO AD

CLR

CHG

DAT A

CM SC O SYNC

LOUT

SINCGARS

POWER/CB1

Figure 11. SINCGARS.

b. Move Master Control Station (MCS)SYSTEM switch to select PROG1, PROG 2, PROG 3, LISTENINGSILENCE, or ALL as applicable.Check that self-test displays PASSand POWER FAULT indicator lights donot come on. If self-test displays FAIL,or SYS or ANR lights come on andstay on, see TM 11-5830-263-10.

MCS self-testdisplays FAIL orPOWER FAULT(SYS or ANR)lights come onand stay on.

ON

OFF

ON

OFF

LINE ACCENT

LOUDSPEAKER

RADIO

INT

OFF

SYS ANR

CHANGE

PROGRAM

POWERLOUDSPEAKERALARMS

VIEW

SYSTEM

STATION FUNCTION

RADIO

STORE

LISTENINGSILENCE

ALLPROG 3

PROG 2

PROG 1

OFF

SYSTEM

LINES LINES

POWER FAULT

SYSTEM SWITCH

POWER FAULTINDICATOR LIGHTS

Figure 12. Power Fault Indicators.

11 Before CSDLEGIBILITY

1. Check that the CSD display is steady,focused, and that all parts of the screencan be read.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:2. If the CSD display cannot be read, check

the SLSD for legibility.Both the CSDand SLSD arenot legible.

12 Before SELF TESTSUMMARYAND MALINDICATOR

1. Check SELF TEST SUMMARY and MALindicator on CSD as follows:

Figure 13. Self Test Summary Screen.

a. Check that all SUBSYSTEMs displayGO in TEST STATUS column.

b. Check that MAL indicator displays �0.�c. If any SUBSYSTEM displays NO-GO,

DEGRADED, or if MAL indicatordisplays a number other than �0,�notify eld maintenance.

13 Before CSD NOTE

Note the WARNINGS, CAUTIONS, andadvisories on CSD. Press CLOSE soft keyto acknowledge.

NOTE

The following checks pertain to both theCSD and the SLSD. As long as one of thedisplays is operational, it can be placed inthe CSD position and the vehicle will beconsidered mission capable. See WP 0075.1. Check CSD as follows:

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:a. Check if CSD display is dirty or

cracked. Clean dirty display.CSD display iscracked.

b. Using brightness keys, check thatdisplay brightness can be adjusted.

Displaybrightnesscannot beadjusted.

Figure 14. CSD Brightness Keys.

c. Check screen navigation by pressingthe following softkeys in order:CLOSE, SETUP, and POWER MGMT.Then PREVIOUS two times, andMAIN.

CSD screensdo not displayas selected bysoftkeys.

14 Before SQUADLEADER�SSMARTDISPLAY

1. Check squad leader�s display as follows:

Figure 15. Squad Leader�s SMART Display.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:a. Check if display is dirty or cracked.

Clean dirty display.Display iscracked.

b. Using brightness keys, check thatdisplay brightness can be adjusted.

Displaybrightnesscannot beadjusted.

c. Check that display shows DRVRand GNR images when SLSD bezelbuttons are pressed.

Display does notshow imagesas selected bybezel buttons.

15 Before GUN FANS COMMANDER

Press and release GUN FAN button on SCB.Check that gun fans can be heard. Press andrelease GUN FAN button again to turn off fans.

Gun fans cannotbe heard.

Figure 16. Gun Fan Control.

16 Before TASDEFOGGER

GUNNER

Move FAN DEFOGGER switch to HIGHposition. Check that heated air exits out frontof sight shield.

Heated air doesnot exit out front ofsight shield whenFAN DEFOGGERswitch is in HIGHposition.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

Figure 17. FAN DEFOGGER Switch Location.

17 Before TURRETSHIELD DOOR

1. Check that cargo and driver�s hatch areclosed. Open turret shield door. Checkthat DRIVE indicator light goes off andOPEN HATCH light comes on when turretshield door is opened.

DRIVE indicatorlight does not gooff with turret shielddoor open.

Turret rotates withturret shield dooropen.

Turret shield doordoes not lock inclosed position.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

Figure 18. Drive Indicator Light and Open Hatch/Door Lights.

2. Ensure that turret shield door openingand top of vehicle are clear of personnel.Attempt to rotate turret. Turret shouldnot rotate.

Turret rotateswith turret shielddoor open.

3. Close turret shield door. Check thatturret shield door locks in closed position.Check that OPEN HATCH light goesoff and DRIVE indicator light comes onwhen turret shield door is closed.

Turret shielddoor does notlock in closedposition.

DOOR LOCK

TURRETSHIELDDOOR

Figure 19. Turret Shield Door Lock.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:18 Before GHS NOTE

Commander gives order for operation inPOWER mode.1. Check GHS as follows:

a.Check that cargo hatch and driver�shatch are closed.

b. (C) Use intercom to tell crew membersthat turret is to be operated in POWERmode.

c. Release turret travel lock.d. Using GHS, traverse turret to right and

left, and elevate and depress gun.Then traverse to 6400 mils. If turretdoes not respond to control handles,notify eld maintenance.

Turret does nottraverse or gundoes not elevateand/or depress.

19 Before CHS 1. Check function of CHS. Using CHS,traverse turret to right and left, andelevate and depress gun. Then traverseto 6400 mils. If turret does not respond toCHS, notify eld maintenance.

Turret does nottraverse or gundoes not elevateand/or depress.

Turret does notrotate to right.

2. Check Commander�s Override. HaveGunner squeeze palm grips and traverseturret left. Commander attempt totraverse turret right.

Turret does notrotate to right.

20 Before IBASOPERATION

1. Check IBAS operation as follows:

a. Press HI/LO MAG button on GHS.Check that view switches from WideField of View (LO MAG) to NarrowField of View (HI MAG). Press buttonagain to switch back.

Biocular Displayor DVO viewdoes not switchfrom WideField of View(LO MAG) toNarrow Field ofView (HI MAG)when HI/LOMAG button ispressed.

b. Check that reticles and centerdot are visible in Biocular Displayand DVO eyepiece. Adjust reticlebrightness if necessary. If reticles andcenter dot are not visible, notify eldmaintenance.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

FOCUSCOLLAR

BIOCULARDISPLAY

DVOEYEPIECE

Figure 20. Biocular Display and Controls.

c. Using DISPLAY and ADJUSTswitches on GSCP, check that imagefocus, contrast, and brightness canbe adjusted, and reticle/symbolbrightness can be adjusted.

Image focus,contrast, andbrightnesscannot beadjusted.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

DISPLAYSWITCH ADJUST

SWITCH

Figure 21. Display and Adjust Switches.

d. Check that condensation is not presentin DVO eyepiece. If condensation ispresent, notify eld maintenance.

e. Adjust focus of image in DVO eyepieceby turning focus collar. If image cannotbe focused, notify eld maintenance.

DVO imagecannot befocused.

NOTE

FLIR can operate only after cooling downfor 15 minutes.

f. Check that cooldown symbol is notvisible.

Cooldownsymbol stillvisible after 15minutes.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

Figure 22. FLIR COOLED Down Indicator.

g. Press FLIR/TV button on GHS toswitch Biocular Display to FLIR. Checkthat FLIR view appears in BiocularDisplay.

FLIR view doesnot appear inBiocular Displayafter pressingFLIR/TV button.

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

FLIR/TVBUTTON

Figure 23. FLIR/TV Button.

21 Before SYSTEMNULLING

1. Close ballistic sight shield doors by takingactuators handles out of open lockedposition and turning actuators to thelocked position.

2. Press TAS ALIGN button on GSCP toalign IBAS.

IBAS notaligned.

3. Check that both GHS and CHS are incentered positions with palm switchesreleased.

4. On GHS, press NULL button.5. When �Nulling� disappears on the

TAS reticle, check accuracy of nullingprocedure as follows:a. Look through DVO and using GHS,

place DVO reticle on a target about300 meters away.

0089 23

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

Figure 24. DVO Reticle View.

b. Press FLIR/TV button on GHS toselect TV on Biocular Display. Checkthat TV reticle is still on same point oftarget as DVO reticle.

TV reticle is noton same point oftarget as DVOreticle.

Figure 25. DVO TV View.

NOTE

The DVO, TV, and FLIR LOSs arecollimated (parallel to each other).The FLIR LOS will always be offsetapproximately 6 inches from the TV andDVO LOSs at any distance.

0089 24

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:c. Press FLIR/TV button on GHS to

select FLIR on Biocular Display.Check that the FLIR reticle is on apoint approximately 6 inches to the leftof the DVO/TV reticle.

FLIR reticle isnot on a pointapproximately 6inches to the leftof the DVO/TVreticle.

Figure 26. FLIR Reticle View.

22 Before IBAS RETICLEDRIFT

GUNNER

Squeeze GHS palm switch and check for anyreticle drift in Biocular Display.

Biocular Displayreticle drifts.

23 Before IBASAUTOTRACK

1. On GHS, momentarily move AUTOTRK-AUTO PT switch to AUTO TRK.A ashing track gate will appear in theBiocular Display.

Figure 27. Biocular Display.

0089 25

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

NOTE

Pressing G-SIZE switch up or down adjuststhe gate height. Pressing switch right orleft adjusts the gate width.

2. Adjust size of track gate by pressing G-SIZE switch on GHS up, down, left, andright.

3. Momentarily press DROP TRK buttonon GHS. Track gate will disappear fromBiocular Display.

24 Before IBAS LASERRANGEFINDER

GUNNER

Using GHS, place Biocular Display reticleon a target about 300 meters away andmomentarily pull BCIS/LRF-LRF switch downto LRF. Range to target will be displayed onBiocular Display.

Range does notappear in BiocularDisplay.

Figure 28. Biocular Range Display.

0089 26

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:25 Before DRY FIRE

OPERATIONOF 25MM GUN

WARNING


Before dry ring, make sure guns are clear,feed chutes are empty, and manual safe isset to SAFE.

WARNING

Hands can be crushed if gun rotor moves.

Turn turret power off or set the gun elevationto manual mode before reaching into gunrotor area.

CAUTION

25mm gun is easily damaged. Checksshould be made in exact order shown.1. Move TURRET DRIVE switch to OFF.

Move TURRET POWER switch to OFF.Remove 25mm gun guard and opengun cover. Move manual safe handle toSAFE position.

Manual safehandle cannotbe moved toSAFE position.

0089 27

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

MANUALSAFEHANDLE

Figure 29. Manual Safe Handle.

2. Check that bolt position indicator is inSEAR position. If bolt position indicatoris not in SEAR position, verify timing of25mm gun feeder (WP 0023).

3. Check that drive shaft handle does notturn over 1/2 inch (13 mm). If drive shafthandle turns over 1/2 inch (13 mm),position 25mm gun bolt in SEAR position(WP 0024).

4. Move TURRET POWER switch to ON.Move TURRET DRIVE switch to ON.Press and release 25mm switch to AP.Move ARM-SAFE-RESET switch toARM. Check that ARM indicator lightcomes ON.

ARM indicatorlight does notcome ON.

0089 28

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

Figure 30. Turret Control Switches/Buttons and Indicator Lights.

5. Check that SEAR/MISFIRE indicatorlight is on steady.

SEAR/MISFIREindicator lightdoes not comeon steady.

6. Check that LO AMMO OVRD indicatorlight ashes.

7. Press LO AMMO OVRD button. Checkthat LO AMMO OVRD indicator lightcomes on steady.

LO AMMOOVRD indicatorlight does notcome on steady.

NOTE

When palm and trigger switches aresqueezed, 25mm gun will dry re and cycleto MISFIRE position because no ammo isin 25mm gun. SEAR/MISFIRE indicatorlight will ash when gun is in MISFIREposition.

8. Dry re 25mm gun by squeezinggunner�s palm and trigger switches.Check that bolt position indicator movesto MISFIRE position.

0089 29

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

NOTE

When SEAR/MISFIRE button is pressedand palm and trigger switches squeezed,25mm gun will cycle to SEAR position andSEAR/MISFIRE indicator light will comeon steady.

9. Press MISFIRE button and squeezegunner�s palm and trigger switches.Check that bolt position indicatormoves to SEAR position and thatSEAR/MISFIRE indicator light comes onsteady.

BOLTPOSITIONINDICATOR

SEAR POSITION

Figure 31. ARM-SAFE-RESET Switch, BOLT Position Indicator and SEAR Position.

0089 30

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:10.Move ARM-SAFE-RESET switch to

RESET, then release back to SAFE.Check that ARM, AP, LO AMMO OVRD,and SEAR/MISFIRE indicator lights goout.

ARM, AP,LO AMMOOVRD, orSEAR/MISFIREindicator lightstays on.

11.Close gun cover and install 25mm gunguard.

26 Before DRY FIRECOAXMACHINE GUN

WARNING


Before dry ring, make sure guns are clear,feed chutes are empty, and manual safe isset to SAFE.1. Move TURRET DRIVE switch to OFF.

Move TURRET POWER switch to OFF.Open coax machine gun access doors.Check that manual safety is in S (safe)position.

0089 31

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

MANUALSAFETY

Figure 32. Manual Safety Location.

2. Push manual safety to re position. Pullcharger handle back rmly. Check thatcharger handle moves smoothly and boltlocks to the rear.

COAX MACHINE GUN

TRIGGER

CHARGERHANDLE

.

Figure 33. Coax Machine Gun.

0089 32

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:3. Push manual safety to S (safe) position

and pull trigger.4. Push manual safety to re position.5. Move TURRET POWER switch to ON.

Move TURRET DRIVE switch to ON.Press 7.62mm button on SCB. Checkthat 7.62mm indicator light comes on.

Figure 34. Coax Machine Gun Indicators.

6. Move ARM-SAFE-RESET switch toARM. Check that ARM indicator lightcomes on and LO AMMO OVRDindicator light ashes.

ARM indicatorlight does notcome on.

7. Press LO AMMO OVRD button. Checkthat LO AMMO OVRD indicator lightcomes on steady.

8. Hold charger handle back and havegunner squeeze palm and triggerswitches on GHS. Let bolt return toforward position.

9. Move ARM-SAFE-RESET switch toRESET, then release back to SAFE.Check that ARM, 7.62mm, and LOAMMO OVRD indicator lights go out.

10.Push manual safety to S (safe) position.Close coax machine gun access doors.

0089 33

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:27 Before TML

OPERATION1. Move LHR switch on SCB to UP to raise

TML to ring position. Check that LHRUP indicator light comes on after TML israised.

LHR UP indicatorlight does not comeon.

Reticle is notpresent.

LHR UP indicatorlight stays on orashing M appearsin Biocular Display.

Figure 35. LHR Switch and Indicator Light.

2. Check that reticle is illuminated in DVOand present in Biocular Display.

Reticle is notpresent.

3. Check for TOW status indicator inBiocular Display.

4. Move LHR switch on SCB to DOWN tolower TML to stowed position. Checkthat LHR UP indicator light goes out.

LHR UPindicator lightstays on orashing Mappears inBiocular Display.

0089 34

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:28 Before SMOKE

GRENADELAUNCHEROPERATION

WARNING

Accidental ring of smoke grenades canseriously injure or kill personnel anddamage equipment.

Make sure launcher tubes are empty beforecontinuing.1. Check smoke grenade launchers for

debris and damage. If unred smokegrenades are found in grenade launchertubes, remove unred grenades. Iflauncher is damaged, notify eldmaintenance.

GRENADE LAUNCHER TUBE

SMOKE GRENADE

Figure 36. Grenade Launcher Tubes.

2. Move GRENADE LAUNCHER switch toON. Check that GRENADE LAUNCHERindicator light comes on. If GRENADELAUNCHER indicator light does notcome on, do not load smoke grenades.

3. Press TRIGGER button. Check thatTRIGGER indicator light comes onwhen TRIGGER button is pressed. IfTRIGGER indicator light does not comeon, do not load smoke grenades. MoveGRENADE LAUNCHER switch to OFF.

0089 35

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

Figure 37. Grenade Launcher Controls.

29 Before FINAL CSDCHECK

1. Check CSD as follows:

a.Check that MAL indicator displays �0.� MAL indicatordoes not display�0.�

Figure 38. Commander�s Smart Display Status Screen.

0089 36

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ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

NOTE

ENVIRONMENTAL PARAMETERS screenis now labeled METEOROLOGICALPARAMETERS. Softkey access remainsthe same.

b. Go to METEOROLOGICALPARAMETERS screen(SETUP FIRECONTROL METEOROLOGICALPARAM) and enter current conditions.

MAL0 21 1535Z JAN 96

10S EG 59835E 5598 M MSL19738N +/-123 M CEP

GPS FOM=1

FBCB2OPERATIONAL

APPLIQUEON

Figure 39. Meteorological Parameters Screen.

30 Before DAGR 1. Perform PMCS. SeeTM 11-5820-1172-13.

Inspection criterianot met.

2. Perform commander self-test. SeeTM 11-5820-1172-13.

0089 37

TM 9-2350-373-10-2 0089

PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) � (Continued)PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR THE M2/M3 ODS SA TURRET - DURING

ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:31 During DEBRIS

SHIELDCommander COMMANDER

Inspect debris shield for breakage or cracks.Replace debris shield if broken or cracked .

PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR THE M2/M3 ODS SA TURRET - AFTER

ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:32 After TURRET

EXTERIORCAUTION

Before inspecting turret, ensure all weaponsare in safe mode.1. Check turret exterior for damage and

obstruction.

2. Check area outside of turret for objectsthat will block traversing turret. If anobject is found, move it out of the way.Remove all shell casings and links frominside and around armor ring segments.

0089 38

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:33 After 25MM GUN

BARRELGUNNER

WARNING

Hot parts can burn you.

25mm weapon can be very hot after ring.Contact with a hot barrel or hot parts canseriously burn you.

Allow the 25mm weapon to cool beforeworking on or near it. Use heat protectivegloves if it is necessary to work on or nearhot parts.

WARNING

25mm gun barrel may have xed radiactiveDU residue inside after ring M919ammunition.

If M919 ammunition has been red, surveymuzzle end of gun barrel with AN/VDR-2,PDR-77, or equivalent radiation detectioninstrument. Beta window of radiationdetection instrument must be open whenreadings are taken. See . Wear gloves.

If xed radioactive residue is present,remove barrel from service and dispose ofas low-level radiactive waste in accordancewith

NOTE

Fixed radioactive residue inside of the gunbarrel after ring M919 rounds suggests anin-bore projectile breakup. Breakups canoccur because of a worn or damaged barrelor because of defective ammunition.0089 39

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:Check that 25mm gun barrel is aligned andlocked in 25mm gun support and that muzzlebrake is free of obstructions.

Figure 40. 25mm Gun.

34 After ARMOREDCOMMANDER�SSHIELD (ACS)

NOTE

Ensure all Debris Shields are installed whenACS is not in use.1. Inspect ACS for damaged or missing

parts. If ballistic window is damaged,refer to (WP 0112).

2. Inspect ACS for dirt, oil, grease, ordebris. Clean as required. See cleaninginstructions (WP 0111).

3. Inspect ACS ballistic window and debrisshield for visual clarity.

Any missing ordamaged parts,or visual clarityis less than 50percent.

35 After SMOKEGRENADELAUNCHERS

1. Check smoke grenade launchers fordebris and damage. If unred smokegrenades are found in launcher tubes,remove unred grenades. If launcheris damaged, do not load it. Notify eldmaintenance.

0089 40

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

SMOKEGRENADE

GRENADELAUNCHER

TUBE

Figure 41. Smoke Grenade Launchers.

2. If debris or dirt is found inside grenadelauncher tubes, clean launcher tube.

3. Install rubber caps on smoke grenadelauncher tubes.

RUBBERCAP

SMOKEGRENADE

LAUNCHER

Figure 42. Rubber Cap Installation.

36 After SMOKEGRENADESTOWAGEBOXES

COMMANDER

Check smoke grenade stowage boxes fordebris and damage. Clean boxes as needed.

37 After TML NOTE

Inspect and clean TML daily when TOWmissiles have been red.1. Remove dust cover from TML. Check

TML for debris and damage.

0089 41

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

TOWLAUNCHER

LOADINGHANDLE

DUST COVER

HANDLELOCKS

Figure 43. TML Components.

2. Check loading handles and handle lockson TML for damage.

Loading handlesor handle locksdo not operateproperly.

3. Install dust cover on TML.38 After GUNNER�S

HATCHCOVER

WARNING

Falling hatch could seriously injure you.

Keep head lower than closed hatch positionwhen opening or closing hatch. Keep handsclear of hatch rim when closing. Make surelatch pin or mechanism is fully engagedwhen hatch is in any open position.

0089 42

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:1. Check gunner�s hatch cover. Open and

close gunner�s hatch cover. Check thathatch cover can be locked in OPEN andCLOSED position. Check that quickrelease pin can be inserted in lockingholes to secure latch handle.

Quick releasepin is missingor cannot beinserted intolocking holesto securelatch handle.Gunner�s hatchcover cannot belocked in OPENor CLOSEDposition.

2. Check cushioning pad on gunner�s hatchcover for cracks and missing parts.

39 After DECKCLEARANCESYSTEM

1. Move TURRET POWER switch to ON.

2. Open driver�s hatch to POP-UP position.Check that OPEN HATCH annunciatorlight on SCB comes on.

OPEN HATCHannunciator lightdoes not comeon.

3. Close driver�s hatch and open cargohatch to POP-UP position. Check thatOPEN HATCH annunciator light on SCBcomes on.

OPEN HATCHannunciator lightdoes not comeon.

4. Close cargo hatch and check that OPENHATCH annunciator light on SCB goesout. If light stays on with driver�s hatchand cargo hatch closed, notify eldmaintenance.

0089 43

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

WARNING

Combat override disables safety interlocks.Soldiers can be killed or seriously injuredwithout safety interlocks working.

Do not activate combat override unlessturret shield door, driver�s hatch, and cargohatch are closed. Do not activate combatoverride unless in COMBAT and hatchswitches have received battle damage.

NOTE

When combat override is active, COMBATOVRD annunciator light on the systemcontrol box is lit and COMBAT OVERRIDEappears at the bottom of IBAS and CIVvideo. When either cargo or driver�s hatchor turret door is open, and combat overrideis active, the OPEN HATCH annunciatorlight on the system control box ashes.

NOTE

Barrel of 25mm gun will elevate by itselfbefore reaching rear deck. Barrel will passover rear deck, then depress by itself -160mils. Check that COMBAT OVERRIDEswitch is OFF.

5. Move TURRET POWER switch to ON.Release travel lock.

6. Depress 25mm gun to -160 mils.Traverse turret to left and right in fullcircle at -160 mils. Check that 25mm gunelevates and depresses by itself whenpassing over rear deck.

Turret will nottraverse. Turretstops traversingwhen 25mm gunreaches reardeck. 25mmgun strikes reardeck.

0089 44

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:7. If gun or TML strike any stowed

equipment, or if stowed equipment is inight path, restow it.

WARNING

Gun barrel can move unexpectedly duringnext test series.

Unexpected gun barrel movement canseriously injure personnel or damageequipment.

Be sure personnel and equipment areclear of gun barrel before performing nexttest series.

8. Elevate 25mm gun to 0 mils. Opendriver�s hatch to UPRIGHT position.Traverse turret to left and right usinggunner�s control handles.

Turret doesnot traversewhen usinggunner�s controlhandles withdriver�s hatchin UPRIGHTposition.

9. Close driver�s hatch and open cargohatch to UPRIGHT position. Traverseturret to left and right using gunner�scontrol handles.

Turret does nottraverse whenusing gunner�scontrol handleswith cargo hatchin UPRIGHTposition.

10.Move cargo hatch to TOW LOADposition. Try to traverse turret to left andright using gunner�s control handles.Check that turret does not traverse.

Turret traverseswhen cargohatch is in TOWLOAD position.

11.Close cargo hatch and raise TOWlauncher. Open cargo hatch. Press TOWbutton on SCB and wait 20 seconds.Then close cargo hatch. Check that NOFIRE ZONE annunciator light on SCBgoes out.

NO FIRE ZONEannunciator lightstays on.

0089 45

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:12.Stow TOW launcher.

40 After 25MM AMMOCANS

1. Check HE ammo can as follows:

a. Traverse turret to HE load position(2150 mils).

b. Move TURRET DRIVE switch to OFF.Move TURRET POWER switch toOFF. Set turret travel lock.

WARNING


c. (H) Open turret shield door and checkHE ammo can door. Turn handle andremove HE ammo can door; theninstall HE ammo can door and turnhandle to latch. Then close turretshield door.

HE ammo candoor cannotbe closed andlatched.

HE AMMOCAN DOOR

HANDLE

Figure 44. HE Ammo Can Door.

0089 46

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

NOTE

Roller retainer will lock when moved all theway to the right. Unlock roller retainer bymoving it to the left.

d. Turn handle and remove HE top ammocan door. Rotate roller rapidly on rollerretainer. If HE top ammo can roller orroller retainer drags or binds, notifyeld maintenance.

Ammo can rollerretainer binds ordrags.

e. Check loading rails; If dirty, wipe withclean cloth.

f. Check retroreector on top ammo candoor; If dirty, wipe with clean lint-freecloth.

g. Install top ammo can door and turnhandle to latch.

h. Grasp roller and move roller retainerto the right and to the left.

ROLLER

ROLLERRETAINER

Figure 45. Roller and Roller Retainer.

0089 47

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

LOADING RAILS

HE AMMOCAN

Figure 46. Loading Rails.

RETROREFLECTOR

Figure 47. Retroreector.

i. Release turret travel lock. MoveTURRET POWER switch to ON. MoveTURRET DRIVE switch to ON.

2. Check AP ammo can as follows:a. Traverse turret to AP load position

(4350 mils).b. Move TURRET DRIVE switch to OFF.

Move TURRET POWER switch toOFF. Set turret travel lock.

0089 48

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

WARNING


c. (G) (H) Have helper open turret shielddoor and check AP ammo can door.Turn handle and remove AP ammocan door. Check loading rails; ifdirty, wipe with clean cloth. Checkretroreector on ammo can door; ifdirty, wipe with clean, lint-free cloth.Install AP ammo can door and turnhandle to latch. Then close turretshield door.

AP ammo candoor cannotbe closed andlatched.

HANDLEAPAMMOCANDOOR

RETROREFLECTORAP AMMOCAN

LOADINGRAILS

Figure 48. AP Ammo Can Door.

d. Release turret travel lock. MoveTURRET POWER switch to ON. MoveTURRET DRIVE switch to ON.

0089 49

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:e. Traverse turret to 6400 mils. Move

TURRET DRIVE switch to OFF. MoveTURRET POWER switch to OFF. Setturret travel lock.

41 After 25MM GUN WARNING

The M919 sabot round uses a depleteduranium (DU) penetrator which emits lowlevels of radiation. Wear gloves whenhandling DU or M919 rounds. Wash handsbefore eating or touching your face. If DUcorrosion (yellow or white power or stain) isvisible on the surface of the round, disposeof gloves in accordance with

NOTE

Due to critical nature of breech assemblyand ring pin for safe and reliable 25mmgun operation, the following componentsmust be replaced at the following intervals:

Firing pin (P/N 12524325) replaced after8000 rounds.

Firing pin (P/N 12524512) replaced after12,000 rounds.

NOTE

Enhanced breech assembly (P/N 12524527)shall be inspected at 25,000 rounds andevery 2500 rounds thereafter. There is noround count limit for replacement of theenhanced breech. The standard breech isreplaced at 25,000 rounds.1. Enter rounds count information on

DA Form 2408-4.

0089 50

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

WARNING

25mm gun barrel may have xedradioactive DU residue inside after ringM919 ammunition.

If M919 ammunition has been red,survey muzzle end of gun barrel withAN/VDR-2, PDR-77, or equivalentradiation detection instrument. Betawindow of radiation detection instrumentmust be open when readings are taken.See TM 11-6665-251-10. Wear gloves.

If xed radioactive residue is present,remove barrel from service and disposeof as low-level radioactive waste inaccordance with

NOTE

Fixed radioactive residue inside of the gunbarrel after ring M919 rounds suggestsan in-bore projectile breakup. Breakupscan occur because of a worn or damagedbarrel or because of defective ammunition.

NOTE

Normal rings of M919 DU ammunitiondoes not cause radioactive contaminationin the M242 gun barrel. However, ifthe barrel is found to be radioactivelycontaminated, the barrel is to be takenout of service without being cleaned, endssealed with tape, and the barrel marked�Low Level Radioactive Waste.� Storageand return of the barrel is accomplished inaccordance with AR 385-10.

NOTE

25mm gun must be cleaned, inspected,and lubricated daily when it has been red.

0089 51

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:2. Remove 25mm gun feeder (WP 0098),

barrel (WP 0095), receiver (WP 0101),and track and bolt assembly (WP 0104).Disassemble track and bolt assembly.

3. Clean, inspect, and lubricate 25mm gunbarrel (WP 0096). If damaged notify eldmaintenance.

25mm gunbarrel isdamaged.

4. Clean, inspect, and lubricate 25mm gunfeeder (WP 0099). If damaged notifyeld maintenance.

25mm gunfeeder isdamaged

5. Clean, inspect, and lubricate 25mm gunreceiver (WP 0102). If damaged notifyeld maintenance.

25mm gunreceiver isdamaged.

6. Clean, inspect, and lubricate 25mm guntrack and bolt assembly (WP 0106). Ifdamaged notify eld maintenance.

25mm guntrack and boltassembly isdamaged.

7. Assemble 25mm gun track and boltassembly (WP 0107). Install track andbolt assembly (WP 0108), gun receiver(WP 0103), barrel (WP 0097), and feeder(WP 0100).

8. Install weapon.

0089 52

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:42 After COAX

MACHINE GUNWARNING



WARNING

7.62 gun can move and crush hands whengun is operated with 7.62 access door open.

Keep 7.62 access door closed duringpowered mode operation. Remove turretdrive power mode before opening 7.62access door.

NOTE

Coax machine gun must be cleaned,inspected, and lubricated daily when it hasbeen red.

NOTE

Do not change AZ or EL knob setting. Thiswill affect boresight alignment.1. Remove coax machine gun.

2. Clean, inspect, and lubricate coaxmachine gun.

3. Install coax machine gun.

0089 53

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:4. Check rear gun mount. Do not load or

re coax machine gun during missionif rear gun mount is cracked, bracket isbroken, or parts are missing. Notify eldmaintenance.

Rear gun mountis damaged.

BRACKET

REARGUN

MOUNT

Figure 49. Rear Gun Mount.

5. Check operation of rear mounting pinfor coax machine gun. If rear mountingpin falls out or is missing, notify eldmaintenance. If rear mounting pindoes not move up and down freely, tryexercising pin until it does move freely. Ifpin still does not move freely, notify eldmaintenance. Do not install, load, or recoax machine gun during mission.

Rear mountingpin is missingor not movingfreely.

COAX MACHINE GUN

REAR MOUNTING PIN

Figure 50. Rear Mounting Pin.

0089 54

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:6. Close coax machine gun access doors.

Check that handles secure coax machinegun access doors in closed position.

43 After GUNNER�SSEAT

GUNNER

Check that gunner�s seat can be moved up,down, forward, and backward freely. Checkthat seat can be locked into position.

44 After GUNNER�SPERISCOPES

1. If over 50% visibility loss, notify eldmaintenance. Check gunner�s twoperiscopes for dirty or cracked periscopelenses. If periscope lenses are dirty, wipewith clean, lint-free cloth.

GUNNER'SPERISCOPE

PERISCOPELENS

BLACKOUTCOVER

Figure 51. Periscope Components.

2. Open and close blackout covers. Checkthat blackout covers are not torn andstay in place when fastened.

45 After CMDR�SHATCHCOVER

WARNING

Falling hatch could seriously injure you.

Keep head lower than closed hatch positionwhen opening or closing hatch. Keep handsclear of hatch rim when closing. Make surelatch pin or mechanism is fully engagedwhen hatch is in any open position.

0089 55

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:1. Check commander�s hatch cover. Open

and close commander�s hatch cover.Check that hatch cover can be lockedin OPEN and CLOSED position. Checkthat quick release pin can be inserted inlocking holes to secure latch handle.

Commander�shatch covercannot belocked in OPENor CLOSEDposition. Quickrelease pinis missing orcannot beinserted intolocking holesto secure latchhandle.

2. Check that hatch pin lever on hatch covermoves freely and is operating correctly.

Hatch pin leverdoes not movefreely or operatecorrectly.

3. Check cushioning pad on commander�shatch cover for cracks and missing parts.

46 After CMDR�S SEAT COMMANDER

Check that commander�s seat can be movedup and down freely and can be locked intoposition.

47 After SERVICELIGHTS

COMMANDER

Check service lights of 25mm gun and coaxmachine gun. If light is out, notify eldmaintenance.

48 After CBRNSYSTEM

1. Activate CBRN system and allow to runfor 5 minutes. See TM 9-2350-373-10-1.

2. Check air outlet hoses for warm,sufcient air ow and for damage andleaks. If hoses are damaged, notify eldmaintenance.

Hoses aredamaged.If ambienttemperature isbelow freezing,CBRN heater isnot functional.

0089 56

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

FLEXIBLEHOSE

AIROUTLETHOSE

AIR OUTLETHOSE

FLEXIBLEHOSE

Figure 52. Air Outlet Hoses.

3. Deactivate CBRN system.

0089 57

TM 9-2350-373-10-2 0089

PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) � (Continued)PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR THE M2/M3 ODS SA - WEEKLY

ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:49 Weekly TURRET

BATTERYWARNING

Battery posts and power cables can shortcircuit and burn you.

Remove vehicle ground cable beforestarting task. Do not touch battery postswith tools or other metal objects. Do notwear jewelry when working with battery orelectrical system.

NOTE

Goggles and gloves may be obtained fromeld maintenance.1. Check turret emergency battery

compartment for damaged or missingbatteries.

One or morebatteries isdamaged,missing, orunserviceable.

0089 58

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

WARNING

Gas from batteries can explode and injureyou.

Use caution when charging or workingnear batteries. Disconnect battery groundbefore working in battery compartment. Donot smoke or allow sparks and ame nearthe batteries.

WARNING

Battery acid can blind or burn you.

Do not get acid on your skin or in youreyes. Wear gloves and goggles whenworking around batteries. If exposed, ushskin and/or eyes with water immediately.

2. Check battery ller caps. Filler caps aredamaged ormissing.

3. Check battery cables and connections. Cables aremissing, broken,or frayed.

4. Check battery terminal posts. Battery postsare damagedor have rust orcorrosion.

5. Check battery hold-downs for broken ormissing components.

Hold-downsare missing orbroken.

6. Report any discrepancies to eldmaintenance.

0089 59

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:50 Weekly 25MM GUN WARNING

DEPLETED URANIUM (DU)

See depleted uranium warning in the frontof this manual.

WARNING



NOTE

Fixed radioactive residue inside of the gunbarrel after ring M919 rounds suggests anin-bore projectile breakup. Breakups canoccur because of a worn or damaged barrelor because of defective ammunition.

NOTE

Normal rings of M919 DU ammunitiondoes not cause radioactive contamination inthe M242 gun barrel. However, if the barrelis found to be radioactively contaminated,the barrel is to be taken out of servicewithout being cleaned, ends sealed withtape, and the barrel marked �Low LevelRadioactive Waste.� Storage and return ofthe barrel is accomplished in accordancewith AR 385-10.

NOTE

25mm gun will be cleaned, inspected, andlubricated weekly, whether it has been redor not. 0089 60

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:1. Remove 25mm gun feeder, barrel,

receiver, and bolt and track assembly.Disassemble bolt and track assembly.

2. Clean, inspect, and lubricate 25mm gunbarrel (WP 0096).

25mm gunbarrel isdamaged.Notify eldmaintenance.

3. Clean, inspect, and lubricate 25mm gunfeeder (WP 0099).

25mm gunfeeder isdamaged.Notify eldmaintenance.

4. Clean, inspect, and lubricate 25mm gunreceiver (WP 0102).

25mm gunreceiver isdamaged.Notify eldmaintenance.

5. Clean, inspect, and lubricate 25mm guntrack and bolt assembly (WP 0106).

25mm guntrack and boltassembly isdamaged.Notify eldmaintenance.

6. Assemble 25mm gun track and boltassembly. Install track and boltassembly, gun receiver, barrel, andfeeder.

7. Install weapon.51 Weekly COAX

MACHINE GUN1. Remove coax machine gun. Clean,

inspect, and lubricate coax machinegun. Install coax machine gun. SeeTM 9-1005-313-10 or WP 0093.

2. Check 7.62mm ammo feed chute andtwo latches for damage. If two latchesare broken or do not secure 7.62mmammo feed chute in place, do not load orre coax machine gun during mission.Notify eld maintenance.

3. Check boresight knobs on coax machinegun for rust, dirt, and free movement.Clean dirty knobs with clean cloth. Ifboresight knobs do not move freely,notify eld maintenance. Do not load orre coax machine gun during mission.

0089 61

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

COAXMACHINE

GUN LATCH

BORESIGHTKNOBS

7.62MM AMMOFEED CHUTE

Figure 53. 7.62MM Ammo Feed Chute and Latch.

4. Check retroreector on coax machinegun ammo box. If retroreector is dirty,wipe with clean, lint-free cloth.

AMMO BOXRETROREFLECTOR

Figure 54. Ammo Box.

52 Weekly TML GUNNER

Clean TML weekly, whether it has been redor not (WP 0091).

TOW launcher iscontaminated withdebris.

53 Weekly SMOKEGRENADELAUNCHERS

1. Remove rubber caps from smoke grenadelauncher tubes. Check rubber caps fordamage.

0089 62

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

SMOKE GRENADELAUNCHER TUBES

RUBBER CAPS

Figure 55. Smoke Grenade Launcher Rubber Caps.

2. Clean and inspect smoke grenadelaunchers (WP 0090).

3. Install rubber caps on smoke grenadelauncher tubes.

54 Weekly TURRETMANUALOPERATION

1. Check operation of gun elevation driveselect lever and gun elevation handwheelby manually elevating and depressing25mm gun. If gun elevation drive selectlever cannot be locked in MANUALposition, or if turning gun elevationhandwheel does not elevate or depress25mm gun, notify eld maintenance.

0089 63

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

GUN ELEVATIONDRIVE SELECTLEVER

GUNELEVATIONHANDWHEEL

Figure 56. Gun Elevation Drive Select Lever and Handwheel.

2. Check manual operation of TML asfollows:a. Move gun elevation drive select lever

to POWER position.b. Move TOW elevation drive select

lever to MANUAL position. If TOWelevation drive select lever cannot belocked in MANUAL position, notify eldmaintenance.

0089 64

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

TOW ELEVATIONDRIVE SELECT LEVER

Figure 57. TOW Elevation Drive Select Lever.

c. Depress TML 4 to 5 inches (10 to 12cm) to clear stow pin out of saddle byusing gun elevation handwheel.

d. Manually raise TML 10 to 12 inches(26 to 30 cm). If TML does not raisesmoothly, notify eld maintenance.

e. Manually release TOW MANUAL LIFTrelease handle until launcher bangsagainst side. If TML does not lowersmoothly, notify eld maintenance.

TOW MANUALLIFT RELEASE

HANDLE

Figure 58. TOW Manual Lift Release Handle.

f. Manually elevate TML until launcheris stowed in saddle. If gun elevationhandwheel cannot be turned withoutexcessive force, binding, or slipping,notify eld maintenance.

0089 65

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:3. Traverse turret manually. Check

operation of turret traverse drive selectlever and turret traverse handwheel.If turret traverse drive select levercannot be locked in MANUAL position,or if turning turret traverse handwheeldoes not traverse turret, notify eldmaintenance.

TURRET TRAVERSEDRIVE SELECT LEVER

TURRETTRAVERSE

HANDWHEEL

Figure 59. Turret Traverse Drive Select Lever and Handwheel.

55 Weekly BACKUPSIGHTOPERATION

1. Check backup sight for damage.

2. Check that eyepiece assembly can rotateto either the gunner�s or commander�sposition. Check that lock lever holdseyepiece assembly in position.

0089 66

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:3. Check that eyepiece assembly adjusts

from 4 to +4 diopters and that diopterscale can be adjusted for each operator.

4. Check that eyecup material is exibleand can be deated for use with gasmask.

56 Weekly TURRETDRIVECONTROLUNIT (TDCU)

WARNING

Turret can rotate and severely injure or killyou. Do not reach through turret shieldopening when turret power is on. Keepturret shield door closed whenever turretdrive power is on. Engage turret travel lockbefore moving or reaching through turretshield opening.1. Traverse turret to 3200 mils. Move

TURRET DRIVE switch to OFF. MoveTURRET POWER switch to OFF. Setturret travel lock.

2. Have helper open turret shield door andcheck that the dust cap and shorting plugare installed on jacks J10 and J11. Thenclose turret shield door.

J10J11

Figure 60. Dust Cap and Shorting Plug.

0089 67

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:3. Release turret travel lock. Move

TURRET POWER switch to ON. MoveTURRET DRIVE switch to ON.

4. Traverse turret to 6400 mils. MoveTURRET DRIVE switch to OFF. MoveTURRET POWER switch to OFF. Setturret travel lock.

57 Weekly ANTENNAS COMMANDER

WARNING

Radio antennas can shock or burn you iftouched while transmitting.

Do not touch antennas when the radiosare in use. Ensure radios are off beforehandling antennas.

Check antenna mounts for damage toantenna support bases and contact points.

CONTACTPOINTS

ANTENNAMOUNT

ANTENNASUPPORT

BASE

Figure 61. Antenna Components.

58 Weekly CMDR�SPERISCOPES

NOTE

If over 50% visibility loss, notify eldmaintenance.

0089 68

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:1. Check commander�s seven periscopes

for dirty or cracked periscope lenses.If periscope lenses are dirty, wipe withclean, lint-free cloth.

2. Open and close blackout covers. Checkthat blackout covers are not torn andstay in place when fastened.

PERISCOPELENS

BLACKOUTCOVER

COMMANDER'SPERISCOPE

Figure 62. Commander�s Periscope Lens and Blackout Cover.

0089 69

TM 9-2350-373-10-2 0089

PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) � (Continued)PREVENTIVE MAINTENANCE CHECKS AND SERVICES FOR THE M2 ODS SA/M3 ODS SA - MONTHLY

ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:59 Monthly 25MM GUN

SYSTEMCAUTION

If installed, ensure the feed chutes and linkejector chutes are properly connected tothe 25mm gun.1. Check AP and HE feed chutes for

damage.Either AP orHE feed chutesare damaged ormissing.

HEFEED CHUTE

AP FEED CHUTE

Figure 63. AP and HE Feed Chutes

2. Check AP and HE link eject chutes fordamage.

Either AP or HElink eject chutesare damaged ormissing.

0089 70

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:

AP LINKEJECT CHUTE

HE LINK EJECT CHUTE

Figure 64. AP and HE Link Eject Chutes.

60 Monthly COAXMACHINE GUNSYSTEM

GUNNER

Check seals on coax machine gun openaccess doors for damage. If seals aredamaged, notify eld maintenance.

Figure 65. Coax Machine Gun Open Access Door Seal.

0089 71

TM 9-2350-373-10-2 0089


ITEMNO.

INTERVALITEM TO BE


EQUIPMENTNOT READY/

AVAILABLE IF:61 Monthly CMDR�S

HATCHEMERGENCYRELEASE

GUNNER

Open turret shield door and checkcommander�s hatch release cable for binds,breaks, proper installation, and operation.

Commander�shatch release cableis binding, broken,is not installed, ordoes not operateproperly.

Figure 66. Commander�s Hatch Release Cable.

MANDATORY REPLACEMENT PARTS

There are no replacement parts required for these PMCS procedures.

END OF WORK PACKAGE

0089 72

TM 9-2350-373-10-2 0090


CLEAN/INSPECT SMOKE GRENADE LAUNCHERS

INITIAL SETUP:

Tools and Special Tools25mm bore brush, (Item 1, WP 0123)25mm cleaning rod assembly, (Item 1, WP 0123)

Materials/PartsPipe cleaner, (Item 4, WP 0125)Rie bore cleaner (RBC), (Item 5, WP 0125)Wiping rag, (Item 20, WP 0125)

Personnel RequiredGunner

ReferencesTM 9-2350-373-10-1

Equipment ConditionVehicle parked (TM 9-2350-373-10-1)Turret shut down (WP 0053)Smoke grenade launchers unloaded (WP 0041)

CLEANING1. REMOVE DISCHARGER CAPS FROM GRENADE LAUNCHER TUBES.

Figure 1. Discharger Cap Removal.

GRENADELAUNCHER

TUBE

DISCHARGERCAP

0090 1

TM 9-2350-373-10-2 0090

INSPECTION-ACCEPTANCE AND REJECTION CRITERIA � CONTINUED2. CLEAN DRAIN HOLES.

a. Use pipe cleaner to get into drain hole at bottom of each grenade launcher tube.b. Loosen and push out any dirt or debris from drain holes.

GRENADELAUNCHER

TUBE

DRAINHOLE

PIPECLEANER

Figure 2. Grenade Launcher Tube Drain Holes.

0090 2

TM 9-2350-373-10-2 0090

INSPECTION-ACCEPTANCE AND REJECTION CRITERIA � CONTINUEDWARNING

Solvent fumes and uid are poisonous and can cause skin irritation.

Solvent may be harmful if swallowed. Avoid skin contact and breathing of fumes.

WARNING

Solvent evaporates rapidly and makes fumes that are ammable.

Do not smoke or allow open ames near solvent fumes.

3. CLEAN INSIDE OF GRENADE LAUNCHER TUBES.a. Put RBC on 25mm bore brush.b. Screw bore brush onto cleaning rod.c. Clean inside of grenade launcher tubes. Use 25mm bore brush.d. Dry with clean wiping rag.

BOREBRUSH

CLEANINGROD

Figure 3. Bore Brush and Cleaning Rod.

END OF TASK

0090 3

TM 9-2350-373-10-2 0090

INSPECTION-ACCEPTANCE AND REJECTION CRITERIA � CONTINUEDINSPECTION-ACCEPTANCE AND REJECTION CRITERIA

NOTE

Report any damaged grenade launcher tubes to eld maintenance.

1. INSPECT GRENADE LAUNCHER TUBES FOR DAMAGE.a. Check smoke grenade launcher for crushed or bent grenade launcher tube.b. Check that electrical ring pin is not corroded.c. Check that grenade launcher tube is secure on smoke grenade launcher.

GRENADELAUNCHER

TUBE

ELECTRICALFIRING

PIN

Figure 4. Grenade Launcher Tube Electrical Firing Pin.

0090 4

TM 9-2350-373-10-2 0090

INSPECTION-ACCEPTANCE AND REJECTION CRITERIA � CONTINUED2. INSTALL DISCHARGER CAPS ON GRENADE LAUNCHER TUBES.

GRENADELAUNCHER

TUBE

DISCHARGERCAP

SMOKE GRENADE LAUNCHER

Figure 5. Discharger Cap Installation.

END OF TASK

END OF WORK PACKAGE

0090 5 / blank

TM 9-2350-373-10-2 0091


CLEAN/INSPECT TOW LAUNCHER

INITIAL SETUP:

Materials/PartsRie bore cleaner (RBC), (Item 5, WP 0125)Wiping rag, (Item 20, WP 0125)


ReferencesTM 9-2350-373-10-1

WP 0011WP 0035WP 0054

Equipment ConditionTOW launcher unloaded (WP 0038)Vehicle parked (TM 9-2350-373-10-1)Turret operating in power mode (WP 0011)

REMOVAL1. TRAVERSE TURRET TO TOW LOAD POSITION (6000 MILS) (WP 0011).2. RAISE TOW LAUNCHER (WP 0035).3. DEPRESS TOW LAUNCHER TO -100 MILS (WP 0035).4. MOVE TURRET DRIVE SWITCH TO OFF.5. MOVE TURRET POWER SWITCH TO OFF.

Figure 1. Turret Drive and Power Switches.

6. MOVE MASTER POWER SWITCH TO OFF. SEE TM 9-2350-373-10-1.

0091 1

TM 9-2350-373-10-2 0091

7. REMOVE DUST COVER.a. Pull top edge of dust cover from top of TOW launcher.b. Pull snap fasteners from bottom of TOW launcher.

TOWLAUNCHER

STRIPS

DUSTCOVER

Figure 2. Dust Cover Removal.

TOW LAUNCHER

SNAPFASTENERS

DUSTCOVER

END OF TASK

CLEANING1. CLEAN TOW LAUNCHER TUBES.

a. Clean inside of TOW launcher tubes with wiping rag.b. Dry inside of TOW launcher tubes with clean wiping rag.

0091 2

TM 9-2350-373-10-2 0091

TOWLAUNCHER TUBES

TOW LAUNCHER

Figure 3. TOW Launcher Tubes.

END OF TASK

INSPECTION-ACCEPTANCE AND REJECTION CRITERIA1. INSPECT DUST COVER FOR DAMAGE.

a. Inspect snap fasteners.b. Inspect strips on TOW launcher and dust cover.c. Inspect dust cover for rips or holes.d. If dust cover is damaged, notify eld maintenance.

TOW LAUNCHER

SNAPFASTENERS

DUSTCOVER

Figure 4. Dust Cover Inspections.

0091 3

TM 9-2350-373-10-2 0091

2. INSPECT TOW LAUNCHER FOR DAMAGE.a. If TOW launcher is damaged, notify eld maintenance.

TOWLAUNCHER

TOW LAUNCHER TUBES

Figure 5. TOW Launcher Tube Inspection.

3. CHECK THAT UMBILICAL CONNECTORS DO NOT EXTEND DOWN INTO TOW LAUNCHER TUBES.a. If umbilical connector extends down into TOW launcher tube, go to Step .b. If umbilical connector does not extend down into TOW launcher tube, go to Step 5.

Figure 6. Umbilical Connector Inspection.

4. REMOVE UMBILICAL CONNECTORS FROM TOW LAUNCHER TUBES.a. Move MASTER POWER switch to ON. See TM 9-2350-373-10-1.b. Move TURRET POWER switch to ON.c. Move ARM-SAFE-RESET switch to RESET, then to SAFE. Wait 10 seconds.d. Move TURRET POWER switch to OFF.

0091 4

TM 9-2350-373-10-2 0091

Figure 7. Turret Power and ARM-SAFE-RESET Switch Locations.

e. Move MASTER POWER switch to OFF. See TM 9-2350-373-10-1.f. If umbilical connectors still extend down into TOW launcher tubes, notify eld maintenance.

UMBILICALCONNECTOR

Figure 8. Umbilical Connector.

0091 5

TM 9-2350-373-10-2 0091

5. INSPECT LOADING HANDLE AND LOCK LATCH FOR DAMAGE.a. Check that lock latch locks loading handle in place.b. Check that loading handle pulls down and aligns lug channels.c. Check that lug channels are blocked when loading handle is locked.d. If loading handle or lock latch are damaged, notify eld maintenance.

LOCKLATCH TOW

LAUNCHER

LUG CHANNELLOADING HANDLE

Figure 9. Loading Handle, Lug Channel, and Lock Latch Locations.

WARNING

Missile launcher, in the up position, can fall rapidly and injure personnel.

Stay clear of launcher path when launcher is up. Stand in front of gunner�s sight when manuallyraising or lowering launcher.

6. INSPECT TOW ELEVATION SYSTEM FOR DAMAGE.a. Pull out and hold TOW MANUAL LIFT release handle and let TOW launcher lower itself all the way down.b. If TOW launcher does not lower all the way down, notify eld maintenance.

0091 6

TM 9-2350-373-10-2 0092


REMOVE COAX MACHINE GUN

INITIAL SETUP:

Personnel RequiredGunner/Commander

ReferencesWP 0013WP 0033

WP 0054

Equipment ConditionTurret shut down (WP 0053)Coax machine gun installed (WP 0094)

REMOVAL1. MANUALLY ELEVATE COAX MACHINE GUN ROTOR TO 200 MILS (WP 0054).2. OPEN COAX MACHINE GUN ACCESS DOORS (WP 0013).

WARNING

Accidental ring of weapons can kill or seriously injure personnel.

Set manual safety to SAFE. Ensure that all weapons are unloaded.

3. CLEAR COAX MACHINE GUN (WP 0033).4. REMOVE COAX MACHINE GUN.

a. Flip front and rear handles out and pull retaining pins from gun.b. Lift coax machine gun from gun mount and pull gun back and out of plenum.c. Place coax machine gun on turret oor.

RETAININGPIN

FRONTHANDLE

REARHANDLE

GUNMOUNT

COAXMACHINE

GUN

Figure 1. COAX Machine Gun Components.

0092 1

TM 9-2350-373-10-2 0092

5. CLOSE COAX MACHINE GUN ACCESS DOORS (WP 0013).

END OF TASK

END OF WORK PACKAGE

0092 2

TM 9-2350-373-10-2 0093


CLEAN/INSPECT/LUBRICATE COAX MACHINE GUN

INITIAL SETUP:


ReferencesTM 9-1005-313-10

Equipment ConditionCoax machine gun removed (WP 0092)

CLEAN/INSPECT/LUBRICATE1. FIELD STRIP, CLEAN, INSPECT, AND LUBRICATE COAX MACHINE GUN. SEE TM 9-1005-313-10.

END OF TASK

END OF WORK PACKAGE

0093 1

TM 9-2350-373-10-2 0094


INSTALL COAX MACHINE GUN

INITIAL SETUP:

Personnel RequiredGunner/Commander

ReferencesWP 0013

WP 0054

Equipment ConditionTurret shut down (WP 0053)

INSTALLATION1. MANUALLY ELEVATE COAX MACHINE GUN ROTOR TO 200 MILS (WP 0054).2. OPEN COAX MACHINE GUN ACCESS DOORS (WP 0013).

WARNING

Accidental ring of weapons can kill or seriously injure personnel.

Set manual safety to SAFE. Ensure that all weapons are unloaded.

WARNING

7.62mm machine gun may explode if barrel is not locked in place when red.

Make sure barrel is locked in place and does not turn before ring 7.62mm machine gun.

0094 1

TM 9-2350-373-10-2 0094

3. MOUNT COAX MACHINE GUN.a. Place coax machine gun on gun mount with gun barrel pointing forward and trigger pointing down.b. Align mounting holes on gun with retaining pins on gun mount.c. Push retaining pins fully into gun.d. Flip in handles on retaining pins to lock.e. Check that coax barrel locking latch is locked and gun barrel does not turn.

COAXMACHINE

GUN

LOCKINGLATCH

GUNBARREL

RETAININGPIN

TRIGGERMOUNTINGHOLES

HANDLES

Figure 1. COAX Machine Gun Components.

COAX MACHINE GUN

GUN MOUNT

4. CLOSE COAX MACHINE GUN ACCESS DOORS (WP 0013).

END OF TASK

END OF WORK PACKAGE

0094 2

TM 9-2350-373-10-2 0095


REMOVE 25MM GUN BARREL

INITIAL SETUP:

Materials/PartsHeat protective mittens, (Item 37, WP 0123)

Personnel RequiredGunnerHelper (H), 2

ReferencesAR 385-10

TM 9-2350-373-10-1TM 11-6665-251-10WP 0054

Equipment ConditionEngine stopped (TM 9-2350-373-10-1)Turret shut down (WP 0053)25mm gun feeder unloaded (WP 0028)

WARNING

Ammunition left in weapon during maintenance can explode when bumped or impacted.Exploding ammunition can kill or seriously injure you.

Be sure all ammunition is removed from weapon before maintenance or testing. Avoid bumpinggun components during removal.

REMOVAL1. TAKE POSITIONS TO REMOVE 25MM GUN BARREL.

a. Enter turret.b. Stand on right side of 25mm gun barrel near gun mount.c. Stand on left side of 25mm gun barrel.

GUNMOUNT

25MM GUNBARREL

Figure 1. 25mm Gun Barrel and Mount.

0095 1

TM 9-2350-373-10-2 0095

2. MANUALLY DEPRESS 25MM GUN TO MAXIMUM DEPRESSION (WP 0054).

WARNING

Hot parts can burn you.

25mm weapon can be very hot after ring. Contact with a hot barrel or hot parts can seriouslyburn you.

Allow the 25mm weapon to cool before working on or near it. Use heat protective gloves if itis necessary to work on or near hot parts.

WARNING

25mm gun barrel may have xed radioactive DU residue inside after ring M919 ammunition.

If M919 ammunition has been red, survey muzzle end of gun barrel with AN/VDR-2, PDR-77,or equivalent radiation detection instrument. Beta window of radiation detection instrumentmust be open when readings are taken. See TM 11-6665-251-10. Wear gloves.

If xed radioactive residue is present, remove barrel from service and dispose of as low-levelradioactive waste in accordance with AR 385-10.

NOTE

Fixed radioactive residue inside of the gun barrel after ring M919 rounds suggests an in-boreprojectile breakup. Breakups can occur because of a worn or damaged barrel or becauseof defective ammunition.

0095 2

TM 9-2350-373-10-2 0095

3. UNLOCK 25MM GUN BARRELa. Pull out and hold 25mm gun barrel release latch.b. Hold 25mm gun barrel with both hands and rotate 25mm gun barrel to left until ALINE arrow is on top.c. Release gun barrel release latch.

25MM GUNBARREL

RELEASELATCH

Figure 2. 25mm Gun Barrel Release Latch and AlineArrow.

ALINEARROW

25MM GUNBARREL

0095 3

TM 9-2350-373-10-2 0095

CAUTION

25mm gun barrel is easily damaged. Slide 25mm gun barrel straight out of gun mount.

4. REMOVE 25MM GUN BARREL.a. Move to front of 25mm gun barrel to share weight distribution.b. Slide 25mm gun barrel straight out of gun mount support assembly.c. Carry 25mm gun barrel slowly and carefully down front of vehicle.

25MM GUNBARREL

Figure 3. Gun Mount Support Assembly.

5. (H) PLACE 25MM GUN BARREL ON CLEAN, CLEAR SURFACE.

END OF TASK

END OF WORK PACKAGE

0095 4

TM 9-2350-373-10-2 0096


CLEAN/INSPECT/LUBRICATE 25MM GUN BARREL

INITIAL SETUP:

Tools and Special Tools25mm bore brush, (Item 1, WP 0123)25mm chamber brush, (Item 1, WP 0123)25mm cleaning rod assembly, (Item 1, WP 0123)Oval brush, (Item 17, WP 0125)

Materials/PartsCleaner, Lubricant and Preservative (CLP), (Item3, WP 0125)Cleaning solvent, (Item 7, WP 0125)GMD grease, (Item 10, WP 0125)General purpose lubricating oil, (Item 15, WP 0125)

Small arms cotton swab, (Item 19, WP 0125)Wiping rag, (Item 20, WP 0125)


ReferencesAR 385-10TM 11-6665-251-10

Equipment Condition25mm gun barrel removed (WP 0095)

0096 1

TM 9-2350-373-10-2 0096

CLEANING

WARNING

Solvent fumes and uid are poisonous and can cause skin irritation.

Solvent may be harmful if swallowed. Avoid skin contact and breathing of fumes.

WARNING

Solvent evaporates rapidly and makes fumes that are ammable.

Do not smoke or allow open ames near solvent fumes.

WARNING

25mm gun barrel may have xed radioactive DU residue inside after ring M919 ammunition.

If M919 ammunition has been red, survey muzzle end of gun barrel with AN/VDR-2, PDR-77,or equivalent radiation detection instrument. Beta window of radiation detection instrumentmust be open when readings are taken. See TM 11-6665-251-10. Wear gloves.

If xed radioactive residue is present, remove barrel from service and dispose of as low-levelradioactive waste in accordance with AR 385-10.

CAUTION

Use of unauthorized cleaning materials and procedures could result in damage, which maylead to premature condemnation of the cannon tube.

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TM 9-2350-373-10-2 0096

NOTE

Fixed radioactive residue inside of the gun barrel after ring M919 rounds suggests an in-boreprojectile breakup. Breakups can occur because of a worn or damaged barrel or becauseof defective ammunition.

NOTE

Special attention should be given to gun barrel support bearing and locking lugs.

When cleaning solvent is used instead of RBC, you do not have to remove cleaning agent.Parts can be air dried or wiped dry with clean dry wiping rag.

NOTE

Clean bore, chamber, and exterior of cannon tube thoroughly, and dry them prior to inspection.Ensure all powder residue, dust, and rust have been removed. Do not expect to see or attemptto obtain a shiny nish in the bore. The cannon tube may exhibit various colors throughoutthe length of the bore, and may from a uniform gray/black to streaks of gray, black, or darkbrown. Copper streaks found in the bore do not affect range or accuracy, and shall be ignored;do not try to remove the copper streaks. These are normal occurrences and, with additionalring, will continue to darken over the life of the cannon tube.

NOTE

The following guidance is provided in support of inspection and cleaning of the 25mmnitride and chrome barrel assemblies. The chrome barrel assembly can be identied by themanufacturer�s identication code number 26978 or 18204.

1. CLEAN OUTSIDE OF 25MM GUN BARREL.a. Dip wiping rag in CLP.b. Scrub dirt and rust from outside of 25mm gun barrel, gun barrel support bearing, and locking lugs.

Figure 1. Gun Barrel, Support Bearing, and Locking Lugs.

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TM 9-2350-373-10-2 0096

2. APPLY CLP TO BORE.a. Apply CLP to swab.b. Put swab in swab holder of cleaning rod.c. Run cleaning rod through 25mm gun barrel and back out.d. Remove and discard swab.

Figure 2. 25MM Gun Barrel and Cleaning RodComponents.

SWABHOLDER

SWAB

CLEANINGROD

3. LOOSEN CARBON DEPOSITS FROM BORE.a. Apply CLP to bore brush.b. Screw bore brush onto cleaning rod.c. Push cleaning rod through 25mm gun barrel and pull out until carbon deposits are loosened.d. Remove bore brush from cleaning rod.e. Clean chamber by repeating Steps a�d. Use chamber brush.

BOREBRUSH

CLEANINGROD

Figure 3. Chamber and Bore Brushes.

CHAMBERBRUSH

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TM 9-2350-373-10-2 0096

4. REMOVE CARBON FROM BORE.a. Apply CLP to swab.b. Put swab in swab holder of cleaning rod.c. Run cleaning rod through 25mm gun barrel and back out.d. Remove and discard swab.e. Repeat steps Steps a�d above until swabs that come out of 25mm gun barrel are clean.

Figure 4. 25MM Gun Barrel and Cleaning Rod.

SWABHOLDER

SWAB

CLEANINGROD

5. DRY BORE OF 25MM GUN BARREL.a. Put clean, dry swab in swab holder of cleaning rod.b. Push cleaning rod down and pull back through length of 25mm gun barrel.

SWABHOLDER

SWAB

CLEANINGROD

Figure 5. Cleaning Rod Components.

END OF TASK

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TM 9-2350-373-10-2 0096

INSPECTION-ACCEPTANCE AND REJECTION CRITERIA

NOTE

The loss of small amounts of chrome plate over the life of the cannon tube is normal andwill not affect its accuracy or safety.

1. CHECK OUTSIDE OF 25MM GUN BARREL FOR CRACKS.a. If 25mm gun barrel is cracked, notify eld maintenance.

2. CHECK NON-RIBBED BARREL ASSEMBLY.a. Inspect barrel assembly for loose or broken muzzle brake.b. Inspect barrel assembly for damaged or missing cotter pin.c. Send barrel assembly to eld maintenance if any of these conditions are found.

Figure 6. 25MM Non-Ribbed Type Gun Barrel Assembly.

3. CHECK RIBBED BARREL ASSEMBLY.a. Inspect barrel assembly for loose muzzle brake or loose spanner nut.b. Inspect barrel assembly for damaged or missing key.c. Inspect barrel assembly for broken or cracked locking tab washer and spanner nut.d. For barrels without locking tab washer, verify torque on spanner nut of 135 ft-lb ± 10 ft-lb (183 N·m ± 14

N·m). Use spanner wrench.e. Send barrel assembly to eld maintenance if any of these conditions are found.

Figure 7. 25MM Ribbed Type Gun Barrel Assembly.

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TM 9-2350-373-10-2 0096

4. LOOK DOWN BORE AND CHECK FOR BENDS IN 25MM GUN BARREL.a. If 25mm gun barrel is bent, notify eld maintenance.

5. CHECK FOR PITS IN BORE OF 25MM GUN BARREL.a. If bore is pitted, notify eld maintenance.

6. CHECK FOR CRACKED OR CHIPPED LOCKING LUGS.a. If locking lugs are cracked or chipped, notify eld maintenance.

END OF TASK

INSPECT/LUBRICATE1. LUBRICATE BORE.

a. Soak clean swab with CLP.b. Put swab in swab holder of cleaning rod.c. Push cleaning rod down and pull back through length of 25mm gun barrel. Discard swab.d. Remove excess CLP with clean swab on swab holder. Repeat Steps a�c above.

SWABHOLDER

SWAB

CLEANINGROD

Figure 8. Cleaning Rod Components.

2. LUBRICATE OUTSIDE OF 25MM GUN BARREL.a. Dampen wiping rag with general purpose lube oil.b. Rub general purpose lube oil on outside of 25mm gun barrel.c. Remove excess oil from 25mm gun barrel with clean wiping rag.

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CAUTION

If a grease other than GMD is used during normal operations, 25mm gun could be damaged.Only GMD should be used during normal operations.

3. PUT COAT OF GMD ON LOCKING LUGS. USE OVAL BRUSH.4. PUT LIGHT COAT OF GMD ON GUN BARREL SUPPORT BEARING. USE OVAL BRUSH.

Figure 9. Gun Barrel Support Bearing and Locking Lugs.

END OF TASK

END OF WORK PACKAGE

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INSTALL 25MM GUN BARREL

INITIAL SETUP:

Tools and Special ToolsOval brush

Materials/PartsGMD grease, (Item 10, WP 0125)Wiping rag, (Item 20, WP 0125)

Personnel RequiredGunner (G)Helper (H)

ReferencesTM 9-2350-373-10-1AR 385-10

Equipment ConditionTurret shut down (WP 0053)Vehicle parked (TM 9-2350-373-10-1)25mm gun receiver installed (WP 0103)25mm gun barrel removed (WP 0095)25mm gun barrel cleaned and lubricated (WP 0096)

INSTALLATION

WARNING

The M919 sabot round uses a depleted uranium (DU) penetrator which emits low levels ofradiation. Wear gloves when handling DU or M919 rounds. Wash hands before eating ortouching your face. If DU corrosion (yellow or white powder or stain) is visible on the surface ofthe round, dispose of gloves in accordance with AR 385-10.

WARNING

Your hands may be cut by sharp edges when lubricating 25mm weapon barrel.

Use rags or brush to lubricate 25mm weapon barrel.

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1. CLEAN AND GREASE GUN BARREL SUPPORT ASSEMBLY.a. Wipe off all old grease from gun barrel support assembly. Use wiping rag.b. Put a heavy coat of new GMD grease on gun barrel support assembly until grooves are full of grease.

Use oval brush.

Figure 1. Gun Barrel Support Assembly Location.

GROOVESGUN BARREL

SUPPORT ASSEMBLY

WARNING

You can be hurt if gun barrel assembly slips from your hands.

Clean your hands before you lift gun barrel assembly. Have a helper assist with the lift.

CAUTION

25mm gun barrel is easily damaged. Slide 25mm gun barrel straight into gun barrel supportassembly.

2. INSTALL 25MM GUN BARREL. HAVE HELPER ASSIST.a. Lift and carry 25mm gun barrel to top front of vehicle.b. Place gun barrel in gun barrel support assembly with ALIGN arrow on top.c. Slide 25mm gun barrel straight into gun barrel support assembly as far as it will go.

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TM 9-2350-373-10-2 0097

ALINEARROW

25MM GUNBARREL

GUN BARRELSUPPORT ASSEMBLY

Figure 2. Gun Barrel Installation.

25MM GUNBARREL

GUN BARRELSUPPORT ASSEMBLY

WARNING

25mm gun may explode if red with the barrel not locked in place.

Make sure that the barrel is locked in place and does not turn.

3. LOCK 25MM GUN BARREL.a. Turn 25mm gun barrel in direction of lock arrow until you hear loud click.b. Check that 25mm gun barrel is locked by turning it in the opposite direction of lock arrow.

25MM GUNBARREL

LOCKARROW

Figure 3. Gun Barrel Lock Location.

25MM GUNBARREL

GUN BARRELSUPPORT BEARING

LOCKINGLUGS

END OF TASK

END OF WORK PACKAGE

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TM 9-2350-373-10-2 0098


REMOVE 25MM GUN FEEDER

INITIAL SETUP:

Personnel RequiredGunnerHelper (H)

ReferencesAR 385-10TM 9-2350-373-10-1

WP 0028WP 0054

Equipment ConditionVehicle parked (TM 9-2350-373-10-1)Turret shut down (WP 0053)

REMOVAL1. UNLOAD 25MM GUN FEEDER (WP 0028).2. PUSH IN FEED SELECT SOLENOID KNOB TO AP POSITION.

Figure 1. Feed Select Solenoid Knob Location.

FEEDSELECTSOLENOIDKNOB

3. RAISE FEEDER HANDLE.a. Push and hold feeder handle latch down.b. Raise feeder handle up.c. Release feeder handle latch. Feeder handle should be locked up.

FEEDERHANDLE

FEEDER HANDLELATCH

Figure 2. Feeder Handle and Latch.

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4. REMOVE GUN POWER CABLE FROM RECEIVER JACK.a. Turn cable plug to the left until unlocked.b. Remove cable plug.

CABLEPLUG

GUNPOWERCABLE

RECEIVERJACK

Figure 3. Gun Power Cable.

CAUTION

Make sure feeder is fully seated before lowering feeder handle. Damage to electrical connectorcould occur if feeder handle is pushed down with feeder out of position.

CAUTION

Make sure feeder handle is lowered and locked in the down position. Damage to the RBD couldoccur through interference with an unlocked feeder handle.

5. LOWER FEEDER HANDLE.a. Push and hold feeder handle latch down.b. Lower feeder handle down.c. Release feeder handle latch. Feeder handle should be latched down.

FEEDERHANDLE

FEEDERHANDLELATCH


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6. REMOVE AP FEED CHUTE FROM 25MM GUN FEEDER.a. Squeeze two latches together and remove AP feed chute from front guide pin hole.b. Push AP feed chute to left away from 25mm gun feeder.

LATCHES

FRONT PIN HOLEFRONT GUIDE PIN

AP FEED CHUTE 25MM GUN FEEDER

Figure 5. AP Feed Chute Removal.

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7. REMOVE HE FEED CHUTE FROM 25MM GUN FEEDER.a. Squeeze two latches together and remove HE feed chute from front guide pin hole.b. Push HE feed chute to left away from 25mm gun feeder.

LATCHES

25MM GUNFEEDER

HE FEEDCHUTE

FRONT PINHOLE

FRONTGUIDE

PIN

Figure 6. HE Feed Chute Removal.

8. MANUALLY ELEVATE 25MM GUN TO 200 MILS (WP 0054).9. PULL OUT DRIVE SHAFT HANDLE.

a. Push in lock button.b. Pull out drive shaft handle as far as it will go.c. Release lock button.

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TM 9-2350-373-10-2 0098

Figure 7. Drive Shaft Handle and Lock Button.

LOCKBUTTON

DRIVE SHAFTHANDLE

CAUTION

25mm gun feeder can be damaged if it is dropped. Use both hands when removing 25mmgun feeder.

10. (H) RAISE FEEDER HANDLE.a. Push and hold feeder handle latch down.b. Raise feeder handle up.c. Release feeder handle latch. Feeder handle should be locked up.


FEEDERHANDLE

FEEDER HANDLELATCH

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TM 9-2350-373-10-2 0098

11. WITH RIGHT HAND, GET A FIRM GRIP ON FEEDER HANDLE. SLIDE OUT 25MM GUN FEEDER ABOUT 12INCHES (30 CM).

25MM GUNFEEDER

FEEDER HANDLE

Figure 9. Feeder Handle.

CAUTION

Make sure feeder handle is lowered and locked in the down position. Damage to the RBD couldoccur through interference with an unlocked feeder handle.

12.LOWER FEEDER HANDLE.a. Push and hold feeder handle latch down.b. Lower feeder handle down.c. Release feeder handle latch. Feeder handle should be locked down.

FEEDERHANDLE

FEEDERHANDLELATCH


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13.WITH LEFT HAND, GET A FIRM GRIP ON STEPPED SPACER. LIFT AND PULL 25MM GUN FEEDERFROM 25MM GUN RECEIVER.

25MM GUNFEEDER

FEEDERHANDLEGUIDE RAIL

STEPPEDSPACER

Figure 11. Stepped Spacer and Gun Feeder.

WARNING

Ammunition left in weapon during maintenance can explode when bumped or impacted.Exploding ammunition can kill or seriously injure you.

Be sure all ammunition is removed from weapon before maintenance or testing. Avoid bumpinggun components during removal.

WARNING

The M919 sabot round uses a depleted uranium (DU) penetrator which emits low levels ofradiation. Wear gloves when handling DU or M919 rounds. Wash hands before eating ortouching your face. If DU corrosion (yellow or white powder or stain) is visible on the surface ofthe round, dispose of gloves in accordance with AR 385-10.

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14.CHECK 25MM GUN ROTOR FOR AMMO.a. Remove any ammo present in gun rotor.

15.REMOVE 25MM GUN FEEDER FROM TURRET TO SQUAD AREA. HAVE HELPER ASSIST.

Figure 12. Gun Feeder Removal.

16.LAY 25MM GUN FEEDER ON FLAT SURFACE WITH FEEDER HANDLE DOWN.

25MM GUNFEEDER

FEEDER HANDLE

Figure 13. Gun Feeder and Feeder Handle.

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17.PUSH IN DRIVE SHAFT HANDLE ON 25MM GUN RECEIVER.a. Push in lock button.b. Push in drive shaft handle as far as it will go.c. Release lock button.

LOCKBUTTON

DRIVE SHAFTHANDLE

Figure 14. Drive Shaft Handle and Lock Button.

END OF TASK

END OF WORK PACKAGE

0098 9 / blank

Documents

TM_9-2350-373-10-2(PMCS)