Marine Engine Maintenance Schedules LEXM6231-01

Marine Engine Maintenance SchedulesFor Marine Propulsion Engines Used inCommercial Applications

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M A R I N E E N G I N E M A I N T E N A N C E S C H E D U L E S

Table of Contents

3116 & 3126 Marine Engine Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3208 Marine Engines (all rated rpms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3304B Marine Engines (all rated rpms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3306B Marine Engines (all rated rpms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3406 Marine Engines (all rated rpms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9

3408 Marine Engines (all rated rpms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11

3412 Marine Engines (all rated rpms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 -13

3508 Marine Engines (rated up to 1300 rpm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-15

3508/3508B Marine Engines (rated 1301 to 1600 rpm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-17












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3116 & 3126 Marine Engine Maintenance ScheduleUse fuel consumption, service hours, or time interval,whichever occurs first.

DailyEngine Crankcase Oil – Check oil levelCooling System – Check levelWater Separator (if equipped) – Drain water and

sedimentWalk-Around Inspection – Check engine for leaks

and loose connectionsAir Cleaner Indicator (if equipped) – Check service

indicator, inspect air cleaner elementMarine Gear (Transmission) – Check oil level

Every 1500 L (400 gal) of Fuel or 50 Hours*Zinc Rods – Inspect/Replace

Initial 250 Hours*Initial Valve Lash and Injector Fuel Timing –

Check/Adjust

Every 7500 L (2000 gal) of Fuel or 250 Hours or Yearly*Scheduled Oil Sampling Analysis (S•O•S)** –

ObtainEngine Crankcase** – Replace oil and filterFuel System – Replace final filter and clean fuel

inlet screen/Replace water separator element (if equipped)

Batteries – Clean/Check electrolyte levelBelts, Hoses, and Clamps – Inspect/Check/ AdjustCooling System – Test for coolant additive

(Conventional Coolant/Antifreeze only)

Every 15 000 L (4000 gal) of Fuel or 500 Hours*Aftercooler Core and Turbocharger Compressor

Housing – CleanCrankcase Breather – Clean

Every 30 000 L (8000 gal) of Fuel or 1000 Hours*Engine Protective Devices – Inspect/CheckRaw Water Pump – Inspect/CleanCooling System – Clean/Flush/Change coolant

and replace thermostat (ConventionalCoolant/Antifreeze only)

Every 60 000 L (16 000 gal) of Fuel or 2000 Hours*Valve Lash and Injector Fuel Timing –

Check/AdjustGovernor – Clean/Replace oil screen

Check/Adjust low idleAftercooler Core and Turbocharger Compressor

Housing – Clean (3116 only)

Every Four Years*Engine Coolant (for engines using LLCA only) –

Clean/Flush/Replace coolant

Overhaul Every 114 000 L (30 000 gal) of Fuel

* First perform previous service hour items.

** The oil change interval is based on fuel consumption. The sump capacity of 25 liters(26.4 U.S. quarts) will allow the maximum consumption of 7500 liters (2000 U.S. gallons)of fuel by the engine. This would be an average fuel consumption of 30 L/hr (8.0 gal/hr). Therefore, use fuel consumption as the best indicator of oil change interval. Confirm the interval with Scheduled Oil Analysis or consultyour Caterpillar dealer.


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3208 Marine Engines (all rated rpms)Use fuel consumption, service hours, or time interval,whichever occurs first.

DailyWalk-Around Inspection – Inspect for leaks and

loose connections Engine Crankcase – Check oil levelCooling System – Check coolant levelMarine Gear Oil – Check levelAir Cleaner Indicator (if equipped) – Check/Inspect/

Clean/ReplaceWater Separator – Drain water and sediment

Every 1900 L (500 gal) of Fuel or 50 Hours* Zinc Rods – Inspect Aftercooler Drain Plug (if equipped) – InspectAir Cleaner – Clean foam filter element (if equipped)

Every 9000 L (2400 gal) of Fuel or250 Hours or Yearly* Scheduled Oil Sampling Analysis (S•O•S) – Obtain Engine Oil and Filters – ChangeFuel System – Replace final fuel filterBatteries – CheckCrankcase Breather (if equipped) – CleanWater Separator – Inspect/Replace elementEngine Protective Devices – Inspect/CheckSea Water Strainer – Inspect/CleanSea Water Pump – Replace impeller and camCooling System – Test for supplemental coolant

additive concentration/Obtain coolant sample for analysis

Belts, Hoses, and Clamps – Inspect/Adjust/ReplaceOil Fumes Separator Canister (if equipped) –

Clean/Replace elementsExhaust Restricter (if equipped) – Inspect/Adjust

linkageAir Cleaner – Paper element air cleaner (if equipped),

foam element air cleaner (if equipped), AIRSEP®

closed crankcase system (if equipped) – Clean/Inspect

Valve Lash (at first oil change) only – Check/Adjust

Every 36 000 L (9000 gal) of Fuel or1000 Hours or Two Years* Cooling System – Clean/Flush/Change coolant,

Check coolant level/Replace thermostats Fuel Pump/Governor Housing – DrainPVC Valve (if equipped) – Check diaphragm and

hosesAftercooler Core (if equipped) – Inspect/Clean Valve lash – Check/Adjust

Every 72 000 L (19 000 gal) of Fuel or2000 Hours* Engine Valve Lash – AdjustSea Water Pump – Inspect/Replace seals & bearingsCoolant Hoses – ReplaceFuel Injection Nozzles – TestAir/Fuel Ratio Control (if equipped) – Check/AdjustTurbocharger (if equipped) – Inspect/CheckStarting Motor – InspectCrankshaft Torsional Vibration Damper and Engine

Mounts – Inspect/CheckHeat Exchanger – Inspect/CleanMarine Engine Performance Analysis – Obtain report

Every Four Years*Engine Coolant (for engines using LLCA only) –

Clean/Flush/Replace coolant

OVERHAUL Every 114 000 L (30 000 gal) of Fuel*Cylinder Head, Connecting Rods, Pistons,

Turbocharger, Oil Pump, Fuel Ratio Control, Cam Followers, Fuel Transfer Pump, and Timing Advance – Inspect/Rebuild or Exchange if necessary

Piston Rings, Main Bearings, Rod Bearings, Crankshaft Seals, Engine Mounts, and Hoses – Install new

Fuel Nozzles, Fuel Injection Pump, Governor, Injectors – Test

Crankshaft, Camshaft, Cam Bearings, and Damper – Inspect

Marine Gear Oil Cooler Core, Aftercooler Core, HeatExchanger Core – Clean/Test

Cooling System – Clean/Flush/Obtain coolant analysis

* First perform previous maintenance interval items.

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3304B Marine Engines (all rated rpms)Use fuel consumption, service hours, or time interval,whichever occurs first.

DailyWalk-Around Inspections – Check for leaks and

loose connectionsEngine Crankcase – Check oil level Cooling System – Check Coolant levelAir Cleaner – Check service indicator/

Service air cleaner when needed Air Starter (if equipped) – Check Lubricator

oil level Air Tank (if equipped) – Drain water and sediment Fuel Tank – Drain water and sediment Water Separator (if equipped) – Drain waterClutch (if equipped) – Lubricate/Check/Adjust

Every 1100 L (300 gal) of Fuel or 50 Hours or WeeklyZinc Rods – Inspect/Replace

First 5600 L (1500 gal) of Fuel or 250 Hours or MonthlyValve Lash – Check/Adjust (within the first and

fourth oil change intervals)

Every 5600 L (1500 gal) of Fuel or250 Hours or Monthly

Scheduled Oil Sampling Analysis (S•O•S) – ObtainEngine Crankcase – Replace oil and filterCrankcase Breather – CleanCooling System (Conventional Coolant/Antifreeze

only) – Test for SCA concentration/add SCA if necessary

Fuel System – Clean Primary fuel filter(if equipped)/Replace final fuel filter

Air Cleaner – Clean/Replace air filter elements Batteries – Clean/Check electrolyte levelBelts – Check/Adjust Hoses – Inspect/Replace

First 22 500 L (6000 gal) of Fuel or1000 Hours or Six MonthsFuel Ratio Control, Set Point and Low Idle –

Check/Adjust

Every 22 500 L (6000 gal) of Fuel or1000 Hours or Six MonthsWater Separator – Replace element Engine Protection Devices – Check operation Fuel Control Linkage – Check/Lubricate

Every 45 000 L (12 000 gal) of Fuel or2000 Hours or YearlyValve Lash and Valve Rotators – Check/Adjust Fuel Ratio Control, Set Point, and Low Idle –

Check/AdjustFuel Nozzles – Test Turbocharger (if equipped) – Clean/Inspect/CheckEngine Mounts – Inspect/Check Crankshaft Vibration Damper – Inspect/Check

Every 68 220 L (18 000 gal) of Fuel or3000 Hours or Two YearsWater Temperature Regulator (Thermostat) –

Replace Cooling System (Long Life Coolant/Antifreeze

only) – Drain/Clean/Replace coolant

Every 90 000 L (24 000 gal) of Fuel or4000 Hours or Three YearsJacket Water Pump, Sea/Raw Water Pump,

Alternator, Starting Motor, Turbocharger, and Air Compressor (if equipped) – Inspect/Rebuild or exchange (if necessary)

Every 135 000 L (36 000 gal) of Fuel or 6000 Hours or Four YearsCooling System (Long Life Coolant/Antifreeze

only) – Drain/Flush/Replace LLCA.

OVERHAULEvery 227 400 L (60 000 gal)


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3306B Marine Engines (all rated rpms)Use fuel consumption, service hours, or time interval,whichever occurs first.

DailyWalk-Around Inspection – Check for leaks and loose

connectionsEngine Crankcase – Check oil level Cooling System – Check coolant levelAir Cleaner – Check service indicator/Service air

cleaner when neededAir Starter (if equipped) – Check lubricator oil levelAir Tank (if equipped) – Drain water and sedimentFuel Tank – Drain water and sedimentWater Separator (if equipped) – Drain water Clutch (if equipped) – Lubricate/Check/Adjust

Every 1900 L (500 gal) of Fuel or50 Hours or WeeklyZinc Rods – Inspect/Replace

First 8500 L (2200 gal) of Fuel or250 Hours or MonthlyValve Lash – Check/Adjust (within the first and

fourth oil change intervals)

Every 8500 L (2200 gal) of Fuel or250 Hours or Monthly Scheduled Oil Sampling Analysis (S•O•S)* – Obtain Engine Crankcase* – Replace oil and filterCrankcase Breather* – CleanCooling System (Conventional Coolant/Antifreeze

only) – Test for SCA concentration/Add SCA if necessary

Fuel System – Clean primary fuel filter (if equipped)/Replace final fuel filter

Air Cleaner – Clean/Replace air filter elementsBatteries – Clean/Check electrolyte levelBelts – Check/AdjustHoses – Inspect/Replace

* For larger sump capacity, these maintenance items may be performed at 500 hours.

First 34 000 L (9000 gal) of Fuel or1000 Hours or Six Months Fuel Ratio Control, Set Point, and Low Idle –

Check/Adjust

Every 34 000 L (9000 gal) of Fuel or1000 Hours or Six MonthsWater Separator – Replace elementEngine Protection Devices – Check operationFuel Control Linkage – Check/Lubricate

Every 67 000 L (18 000 gal) of Fuel or2000 Hours or Yearly Valve Lash and Valve Rotators – Check/AdjustFuel Ratio Control, Set Point, and Low Idle –

Check/AdjustFuel Nozzles – TestTurbocharger (if equipped) – Clean/Inspect/CheckEngine Mounts – Inspect/CheckCrankshaft Vibration Damper – Inspect/Check

Every 91 000 L (24 000 gal) of Fuel or3000 Hours or Two Years Water Temperature Regulator (Thermostat) – ReplaceCooling System (Long Life Coolant/Antifreeze only)

– Add extenderCooling System (Conventional Coolant/Antifreeze

only) – Drain/Clean/Replace coolant

Every 136 000 L (36 000 gal) of Fuel or 4000 Hours or Three Years Jacket Water Pump, Sea/Raw Water Pump,

Alternator, Starting Motor, Turbocharger, and Air Compressor (if equipped) – Inspect/Rebuild or Exchange if necessary

Every 204 000 L (54 000 gal) of Fuel or 6000 Hours or Four Years Cooling System (Long Life Coolant/Antifreeze only)

– Drain/Flush/Replace LLCA

OVERHAUL341 000 L (90 000 gal)


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DailyWalk-Around Inspection – Inspect engine for leaks

and loose connections Engine Crankcase – Check oil levelCooling System – Check coolant level Marine Gear – Check oil levelAir Starter (if equipped) – Check lubricator bowl oil

level Air Cleaner – Check service indicator/Service air

cleaner when necessary Clutch Shift Collar – Lubricate

Every 1900 L (500 gal) of Fuel or50 Hours*Zinc Rods – Inspect/Replace

Every 4750 L (1250 gal) of Fuel or125 Hours*PTO Main Shaft, Shift Lever and Pilot Bearing

(if equipped) – Lubricate Clutch (if equipped) – Check/Adjust

Every 9500 L (2500 gal) of Fuel or250 Hours*Scheduled Oil Sampling Analysis (S•O•S) – Obtain Engine Crankcase – Replace oil and filters Fuel System – Replace final filter/Clean primary filter Cooling System (Conventional Coolant/Antifreeze

only) – Test for coolant additive concentration/Add liquid coolant additive or replace coolant additive maintenance element (if equipped)

Crankcase Breather – Clean Batteries – Clean/Inspect/Check electrolyte level Belts – Check/Adjust/Replace Hoses and Clamps – Inspect/Check Fuel Tank – Drain water and sedimentValve Lash (at first oil change) only – Check/Adjust

Every 38 000 L (10 000 gal) of Fuel or1000 Hours*Engine Protective Devices – Inspect/Check

Every 114 000 L (30 000 gal) of Fuel or3000 Hours*Fuel Ratio Control, Set Point, and Low Idle –

Check/AdjustEngine Mounts – InspectCrankcase Vibration Damper – Inspect/CheckCooling System (Long Life Coolant/Antifreeze only)

– Add extenderWater Temperature Regulator (Thermostat) – ReplaceCooling System (Conventional Coolant/Antifreeze

only) – Clean/Flush/Change coolantPAR Analysis – ObtainValve Lash – Check/Adjust/Inspect valve rotators

Every 190 000 L (50 000 gal) of Fuel or5000 Hours*Fuel Nozzles – TestAlternator – Inspect/Rebuild or ExchangeAir Compressor – Inspect/Rebuild or ExchangeJacket Water Pump – Inspect/Rebuild or ExchangeSea Water Pump – Inspect/Rebuild or Exchange Starting Motor – Inspect/Rebuild or ExchangeTurbocharger – Inspect/Rebuild or Exchange

OVERHAUL Every 760 000 L(200 000 gal) of Fuel for 1200-1350 ratedrpm, 646 000 L (170 000 gal) of Fuel for1800 rated rpm, 380 000 L (100 000 gal)of Fuel for 2100 rated rpm(Fuel amounts are based on an average fuel consumption of 38 liters/hour (10 gallons/hour) for each maintenance interval. The liter quantity will not directly convert to the gallon quantity for the number of hours.)

Cylinder Head, Connecting Rods, Pistons, Cylinder Liners, Turbocharger, Oil Pump, Spacer Plate, Fuel Ratio Control, Cam Followers, Fuel Transfer Pump, and Timing Advance – Inspect/Rebuild or Exchange

Piston Rings, Main Bearings, Rod Bearings, Valve Rotators, and Crankshaft Seals – Install new

Fuel Nozzles – TestFuel Injection Pump – TestCrankshaft, Camshaft, Cam Bearings, Damper,

Governor – Inspect


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3406 Marine Engines (all rated rpms) continuedOil Cooler – Clean/TestAftercooler Core – Clean/TestCoolant Analysis – Obtain



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cleaner when necessary Clutch Shift Collar (if equipped) – Lubricate


Every 6375 L (1688 gal) of Fuel or125 Hours*PTO Main Shaft, Shift Lever, and Pilot Bearing

(if equipped) – Lubricate Clutch (if equipped) – Check/Adjust

Every 13 000 L (3400 gal) of Fuel or250 Hours or Yearly*Scheduled Oil Sampling Analysis (S•O•S)** –

Obtain Engine Crankcase – Replace oil and filters Fuel System – Drain water and sediment from tank/

Replace final filter/Clean primary filter Cooling System (Conventional Coolant/Antifreeze

only) – Test for coolant additive concentration/Add liquid coolant additive or replace coolant additive maintenance element (if equipped)

Crankcase Breathers – Clean Batteries – Clean/Inspect/Check electrolyte level Belts – Check/Adjust/Replace Hoses and Clamps – Inspect/Check Air Cleaner – Clean/Replace air filter elementsValve Lash** (at first oil change only) – Check/Adjust

Every 51 000 L (13 500 gal) of Fuel or1000 Hours*Engine Protective Devices – Inspect/CheckMagnetic Pickup – Inspect/Adjust

Every 153 000 L (40 500 gal) of Fuel or3000 Hours*Fuel Ratio Control, Set Point, and Low Idle –

Check/AdjustEngine Mounts – InspectCrankcase Vibration Damper – InspectCooling System (Long Life Coolant/Antifreeze only)

– Add extenderWater Temperature Regulator (Thermostats) – ReplaceCooling System (Conventional Coolant/Antifreeze

only) – Clean/Flush/Change coolantPAR Analysis – ObtainValve Lash – Check/Adjust/Inspect valve rotators

Every 256 000 L (67 500 gal) of Fuel or5000 Hours*Fuel Nozzles – Test/ExchangeAlternator – Inspect/Rebuild or ExchangeAir Compressor – Inspect/Rebuild or ExchangeStarting Motors – Inspect/Rebuild or ExchangeTurbocharger – Inspect/Rebuild or ExchangeJacket Water Pump – Inspect/Rebuild or ExchangeRaw Water Pump – Inspect/Rebuild or Exchange

Every 306 000 L (81 000 gal) of Fuel or 6000 Hours or Four Years*Cooling System ( Long Life Coolant/Antifreeze only)

– Drain/Flush/Replace LLCA


** The oil change interval is based on fuel consumption. Use fuel consumption as the best indicator of oil change interval. The sump capacityalso determines oil change interval. Standardsump capacity requires oil and filter change at 250 hours. The deep sump capacity requires oil and filter change at 500 hours. Confirm the interval with Scheduled Oil Sampling or contact your Caterpillar dealer.


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OVERHAUL Every 1 140 000 L (300 000 gal) of Fuel for 1250-1350 rated rpm, 874 000 L (230 000 gal) of Fuel for1800 rated rpm, 570 000 L (150 000 gal)of Fuel for 2100 rated rpmCylinder Head, Connecting Rods, Pistons, Cylinder

Liners, Turbocharger, Oil Pump, Spacer Plate, Fuel Ratio Control, Cam Followers, Fuel Transfer Pump, and Timing Advance – Inspect/Rebuild or Exchange

Piston Rings, Main Bearings, Rod Bearings, Valve Rotators and Crankshaft Seals – Replace

Fuel Nozzles – TestFuel Injection Pump – TestCrankshaft, Camshaft, Cam Bearings, Damper,

Governor – InspectOil Cooler – Clean/TestAftercooler Core – Clean/TestCoolant Analysis – Obtain

Fuel amounts are based on an average fuel consumption of 51 liters/hour (13.5 gallons/hour)for each maintenance interval. The liter quantity will not directly convert to the gallon quantity for the number of hours.

3408 Marine Engines (all rated rpms) continued


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Use fuel consumption, service hours, or time interval,whichever occurs first.




cleaner when necessary Clutch Shift Collar (if equipped) – Lubricate


Every 9500 L (2500 gal) of Fuel or125 Hours*PTO Main Shaft, Shift Lever, and Pilot Bearing

(if equipped) – LubricateClutch (if equipped) – Check/Adjust

First 19 000 L (5000 gal) of Fuel or250 Hours*Scheduled Oil Sampling Analysis (S•O•S) – ObtainEngine Crankcase – Replace oil and filtersCrankcase Breather – CleanCooling System (Conventional Coolant/Antifreeze

only) – Test for coolant additive concentrations/Add liquid coolant or replace coolant additive maintenance element (if equipped)

Fuel System – Clean primary filter/Replace final filterBatteries – Clean/Inspect/Check electrolyte levelBelts – Check/Adjust/ReplaceHoses and Clamps – Inspect/CheckFuel Tank – Drain water and sedimentValve Lash (at first oil change only) – Check/Adjust

Every 76 000 L (20 000 gal) of Fuel or1000 Hours*Engine Protection Devices – Inspect/Check

Every 227 500 L (60 000 gal) of Fuel or3000 Hours*Valve Lash – Check/Adjust/Inspect valve rotatorsFuel Ratio Control, Set Point, and Low Idle –

Check/AdjustEngine Mounts – InspectCrankshaft Vibration Damper – InspectCooling System (Conventional Coolant/Antifreeze

only) – Clean/Flush/Change coolantWater Temperature Regulators (Thermostat) –

ReplacePAR Analysis – ObtainCooling System (Long Life Coolant/Antifreeze only)

– Add extender

Every 379 000 L (100 000 gal) of Fuel or 5000 Hours*Fuel Nozzles – Test/ExchangeAlternator – Inspect/Rebuild or ExchangeAir Compressor – Inspect/Rebuild or ExchangeJacket Water Pump – Inspect/Rebuild or ExchangeSea Water Pump – Inspect/Rebuild or ExchangeTurbocharger – Inspect/Rebuild or ExchangeStarting Motor – Inspect/Rebuild or Exchange


3412 Marine Engines (all rated rpms)


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3412 Marine Engines (all rated rpms) continuedOVERHAUL Every 1 520 000 L(400 000 gal) of Fuel for 1200 ratedrpm, 1 310 000 L (345 000 gal) of Fuelfor 1800 rated rpm, 760 000 L(200 000 gal) of Fuel for 2100rated rpmCylinder Head, Connecting Rods, Pistons, Cylinder

Liners, Turbocharger, Oil Pump, Spacer Plate, Fuel Ratio Control, Cam Followers, Fuel Transfer Pump, and Timing Advance – Inspect/Rebuild or Exchange if necessary

Piston Rings, Main Bearings, Rod Bearings, Valve Rotators, and Crankshaft Seals – Install new

Fuel Nozzles – Test Fuel Injection Pump – Test Crankshaft, Camshaft, Cam Bearings, Damper,

Governor – InspectOil Cooler – Clean/TestAftercooler Core – Clean/TestCoolant Analysis – Obtain

Fuel amounts are based on an average fuel consumption of 76.29 liters/hour (20.13 gallons/ hour) for each maintenance interval. The liter quantity will not directly convert to the gallon quantity for the number of hours.


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3508 Marine Engines (rated up to 1300 rpm)Use fuel consumption, service hours, or time interval,whichever occurs first.

When RequiredUsed Filter Inspection – Inspect for debris

DailyWalk-Around Inspection – Inspect engine

for leaks and loose connectionsEngine Crankcase – Check oil levelCooling System – Check coolant levelBelts/Hoses – Check/InspectMarine Transmission Oil – Check levelAir Starter Lubricator (if equipped) – Check levelAir Tank – Drain waterEngine Air Cleaner – Check/Replace elementEngine Oil Filter Differential Pressure – CheckEngine Fuel Filter Differential Pressure – CheckDriven Equipment – Inspect/Check/LubricateDaily Engine Log Sheet – Daily recordings

Every 4550 L (1200 gal) of Fuel or50 Hours*Zinc Rods – Inspect/Replace Marine Gear Oil and Filter – Change oil on new/

rebuilt at first 50 hrs. only, then at normal interval

Every 11 350 L (3000 gal) of Fuel or125 Hours*Clutch – Check/AdjustClutch Bearing – Lubricate

Every 22 700 L (6000 gal) of Fuel or250 Hours* Scheduled Oil Sampling Analysis (S•O•S)** –

Obtain Engine Oil and Filters** – Replace Cooling System (Engines Using Standard Type

Antifreeze Only) – Add conditioner Batteries – Clean/Inspect/Check electrolyte levelAlternator Belts – Inspect/Check/Adjust Fuel Tank – Drain water and sediment Initial Valve Lash/Bridge, and Injector Timing –

Check/Adjust (at first oil change only)

Every 89 000 L (23 500 gal) of Fuel or 1000 Hours* Engine Protective Devices – Inspect/Check Engine Fuel Filters – Replace Primary Fuel Filter – Clean Crankcase Breather – Clean Marine Gear Oil and Filter – Replace Marine Gear Strainer and Breather – Clean Marine Gear Output Shaft Seal – Lubricate Governor Air Actuator (if equipped) – Lubricate

Every 178 000 L (47 000 gal) of Fuel or2000 Hours*Valve Lash/Bridge Adjustment – Check/AdjustTurbochargers – Inspect/Check Engine Mounts – Inspect/Check Damper – Inspect/Check

Every 267 000 L (70 500 gal) of Fuel or3000 Hours or 2 Years*Cooling System (Engines Using Standard Type

Antifreeze Only) – Drain/Flush/Fill Cooling System (Engines Using LLCA Only) –

Add Extender

Every 356 000 L (94 000 gal) of Fuel or4000 Hours*Air Compressor (if equipped) – Inspect/Rebuild or

Exchange if necessary Electric Starter – Inspect/Rebuild or Exchange if

necessary


** For larger optional sump capacity of 224 L (59 gal), these items occur at 500 hours. For larger optional sump capacity of 425 L (112 gal), these items occur at 1000 hours. Refer to the Operation and Maintenance Manual for the correct oil change interval for your specific engine.


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3508 Marine Engines (rated up to 1300 rpm) continuedEvery 535 000 L (141 000 gal) of Fuelor 6000 Hours* Cooling System – Drain/Flush/Fill Thermostats – Replace Turbochargers – Inspect/Rebuild or Exchange if

necessary Water Pump – Inspect/Rebuild or Exchange if

necessary Sea Water Pump – Inspect/Rebuild or Exchange if

necessary Air Starter (if equipped) – Inspect/Rebuild or

Exchange if necessary Alternator – Inspect/Rebuild or Exchange if

necessary

Top End Every 976 000 L (257 500 gal)of Fuel or 11 000 Hours* Cylinder Head Assembly – Rebuild or ExchangeInjectors – Replace PAR Analysis – Obtain after Top End

OVERHAUL Every 1 952 000 L (515 000 gal) of Fuel or 22 000 Hours* All Top End Items Connecting Rods – Inspect/Rebuild or Exchange if

necessary Cylinder Liners – Inspect/Rebuild or Exchange if

necessary Pistons – Inspect/Rebuild or Exchange if necessaryPiston Wrist Pins – Inspect/Exchange if necessarySpacer Plate – Inspect/Exchange if necessaryCam Follower Lifters – Inspect/Exchange if

necessary Fuel Transfer Pump – Inspect/Rebuild or Exchange if

necessary Prelube Pump (if equipped) – Inspect/Rebuild or

Exchange if necessary Mechanical Governor (if equipped) – Inspect/

Rebuild or Exchange if necessaryMechanical Fuel Ratio Control (if equipped) –

Inspect/Rebuild or Exchange if necessary Oil Pumps – Inspect/Rebuild or Exchange if

necessary

Piston Rings – Install New Main Bearings – Install New Rod Bearings – Install New Crankshaft Seals – Install New Crankshaft – Inspect Camshaft – Inspect Cam Bearings – Inspect Damper – Inspect Fuel System Linkage (if equipped) – Inspect Gear Train – Inspect Gear Train Bushings/Bearings – Inspect Thrust Washers – Inspect Driven Unit Alignment – Inspect Oil Cooler – Clean/Test Aftercooler Core – Clean/Test Coolant Analysis – Obtain PAR Analysis – Obtain after Overhaul



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3508/3508B Marine Engines (rated 1301 to 1600 rpm)Use fuel consumption, service hours, or time interval,whichever occurs first.




Every 5450 L (1440 gal) of Fuel or 50 Hours* Zinc Rods – Inspect/Replace Marine Gear Oil and Filter – Change oil on new/


Every 13 600 L (3600 gal) of Fuel or125 Hours* Clutch – Check/AdjustClutch Bearing – Lubricate

Every 27 200 L (7200 gal) of Fuel or250 Hours*Scheduled Oil Sampling Analysis (S•O•S)** –


Antifreeze Only) – Add conditioner Batteries – Clean/Inspect/Check electrolyte levelAlternator Belt – Inspect/Check/Adjust Fuel Tank – Drain water & sediment Initial Valve Lash/Bridge, and Injector Timing –


Every 109 000 L (28 800 gal) of Fuel or1000 Hours*Engine Protective Devices – Inspect/Check Engine Fuel Filters – Replace Primary Fuel Filter – Clean Crankcase Breather – Clean Marine Gear Oil and Filter – Replace Marine Gear Strainer and Breather – Clean Marine Gear Output Shaft Seal – Lubricate Governor Air Actuator (if equipped) – Lubricate



Antifreeze Only) – Drain/Flush/Fill Cooling System (Engines Using LLCA Only) – Add

Extender

Every 436 000 L (115 200 gal) of Fuelor 4000 Hours* Air Compressor (if equipped) – Inspect/Rebuild or


necessary




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3508/3508B Marine Engines (rated 1300 to 1600 rpm) continuedEvery 654 000 L (172 800 gal) of Fuelor 6000 Hours*Cooling System – Drain/Flush/Fill Thermostats – Replace Turbochargers – Inspect/Rebuild or Exchange if





necessary

Top End Every 976 000 L (257 500 gal)of Fuel or 9000 Hours*Cylinder Head Assembly – Rebuild or ExchangeInjectors – Replace PAR Analysis – Obtain after Top End






Exchange if necessary Mechanical Governor (if equipped) – Inspect/Rebuild

or Exchange if necessary Mechanical Fuel Ratio Control (if equipped) –


necessary




18

3508/3508B Marine Engines (rated 1601 to 1800 rpm) Use fuel consumption, service hours, or time interval,whichever occurs first.




Every 6400 L (1650 gal) of Fuel or 50 Hours*Zinc Rods – Inspect/Replace Marine Gear Oil and Filter – Change oil on new/



Every 32 000 L (8500 gal) of Fuel or250 Hours*Scheduled Oil Sampling Analysis (S•O•S)** –


Antifreeze Only) – Add conditioner Batteries – Clean/Inspect/Check electrolyte levelAlternator Belts – Inspect/Check/Adjust Fuel Tank – Drain water & sedimentInitial Valve Lash/Bridge, and Injector Timing –




Every 386 500 L (102 000 gal) of Fuelor 3000 Hours or 2 Years*Cooling System (Engines Using Standard Type


Extender

Every 514 000 L (136 000 gal) of Fuel or 4000 Hours* Air Compressor (if equipped) – Inspect/Rebuild or


necessary




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Every 771 000 L (204 000 gal) of Fuel or 6000 Hours*Cooling System – Drain/Flush/Fill Thermostats – Replace Turbochargers – Inspect/Rebuild or Exchange if





necessary

Top End Every 976 000 L (257 500 gal)of Fuel or 7500 Hours* Cylinder Head Assembly – Rebuild or ExchangeInjectors – Replace PAR Analysis – Obtain after Top End






Exchange if necessary Mechanical Governor (if equipped) – Inspect/

Rebuild or Exchange if necessary

Mechanical Fuel Ratio Control (if equipped) –Inspect/Rebuild or Exchange if necessary

Oil Pumps – Inspect/Rebuild or Exchange if necessary



3508/3508B Marine Engines (rated 1601 to 1800 rpm) continued


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Use fuel consumption, service hours, or time interval,whichever occurs first.




Every 6670 L (1760 gal) of Fuel or 50 Hours*Zinc Rods – Inspect/Replace Marine Gear Oil and Filter – Change oil on new/



Every 33 400 L (8800 gal) of Fuel or250 Hours* Scheduled Oil Sampling Analysis (S•O•S)** –




Every 133 500 L (35 000 gal) of Fuel or1000 Hours*Engine Protective Devices – Inspect/CheckEngine Fuel Filters – Replace Primary Fuel Filter – Clean Crankcase Breather – Clean Marine Gear Oil and Filter – Replace Marine Gear Strainer and Breather – Clean Marine Gear Output Shaft Seal – Lubricate Governor Air Actuator (if equipped) – Lubricate


Every 398 000 L (105 000 gal) of Fuelor 3000 Hours or 2 Years* Cooling System (Engines Using Standard Type


Extender



necessary



3512 Marine Engines (rated up to 1300 rpm)


21

3512 Marine Engines (rated up to 1300 rpm) continuedEvery 796 000 L (210 000 gal) of Fuelor 6000 Hours*Cooling System – Drain/Flush/Fill Thermostats – Replace Turbochargers – Inspect/Rebuild or Exchange if





necessary

Top End Every 1 460 000 L (385 000 gal) of Fuel or 11 000 Hours*Cylinder Head Assembly – Rebuild or ExchangeInjectors – Replace PAR Analysis – Obtain after Top End

OVERHAUL Every 2 920 000 L (770 000 gal) of Fuel or 22 000 Hours*All Top End Items Connecting Rods – Inspect/Rebuild or Exchange if








necessary

Piston Rings – Install New Main Bearings – Install New Rod Bearings – Install New Crankshaft Seals – Install New Crankshaft – Inspect Camshaft – Inspect Cam Bearings – Inspect Damper – Inspect Fuel System Linkage (if equipped) – Inspect Gear Train – Inspect Gear Train Bushings/Bearings – InspectThrust Washers – Inspect Driven Unit Alignment – Inspect Oil Cooler – Clean/Test Aftercooler Core – Clean/Test Coolant Analysis – Obtain PAR Analysis – Obtain after Overhaul



22








Every 41 000 L (10 800 gal) of Fuel or250 Hours* Scheduled Oil Sampling Analysis (S•O•S)** –




Every 164 000 L (43 200 gal) of Fuel or1000 Hours* Engine Protective Devices – Inspect/Check Engine Fuel Filters – Replace Primary Fuel Filter – Clean Crankcase Breather – Clean Marine Gear Oil and Filter – Replace Marine Gear Strainer and Breather – Clean Marine Gear Output Shaft Seal – Lubricate Governor Air Actuator (if equipped) – Lubricate

Every 328 000 L (86 400 gal) of Fuel or2000 Hours* Valve Lash/Bridge Adjustment – Check/AdjustTurbochargers – Inspect/Check Engine Mounts – Inspect/Check Damper – Inspect/Check



Extender



necessary




23

3512/3512B Marine Engines (rated 1301 to 1600 rpm) continued

Every 982 000 L (259 200 gal) of Fuelor 6000 Hours* Cooling System – Drain/Flush/Fill Thermostats – Replace Turbochargers – Inspect/Rebuild or Exchange if





necessary

Top End Every 1 460 000 L (385 000 gal) of Fuel or 9000 Hours*Cylinder Head Assembly – Rebuild or ExchangeInjectors – Replace PAR Analysis – Obtain after Top End

OVERHAUL Every 2 920 000 L (770 000 gal) of Fuel or 18 000 Hours*All Top End Items Connecting Rods – Inspect/Rebuild or Exchange if








necessary




24








Every 48 500 L (12 800 gal) of Fuel or250 Hours*Scheduled Oil Sampling Analysis (S•O•S)** –





Every 388 000 L (102 400 gal) of Fuelor 2000 Hours* Valve Lash/Bridge Adjustment – Check/AdjustTurbochargers – Inspect/Check Engine Mounts – Inspect/Check Damper – Inspect/Check



Extender



necessary




25

3512/3512B Marine Engines (rated 1601 to 1800 rpm) continuedEvery 1 164 000 L (307 200 gal) of Fuel or 6000 Hours* Cooling System – Drain/Flush/Fill Thermostats – Replace Turbochargers – Inspect/Rebuild or Exchange if





necessary

Top End Every 1 460 000 L (385 000 gal) of Fuel or 7500 Hours*Cylinder Head Assembly – Rebuild or Exchange Injectors – ReplacePAR Analysis – Obtain after Top End






Exchange if necessary

Mechanical Governor (if equipped) – Inspect/Rebuildor Exchange if necessary

Mechanical Fuel Ratio Control (if equipped) –Inspect/Rebuild or Exchange if necessary





26

3516 Marine Engines (rated up to 1300 rpm) Use fuel consumption, service hours, or time interval,whichever occurs first.



for leaks and loose connectionsEngine Crankcase – Check oil levelCooling System – Check coolant levelLeaks and Loose Connections – Check engineBelts/Hoses – Check/InspectMarine Transmission Oil – Check levelAir Starter Lubricator (if equipped) – Check levelAir Tank – Drain waterEngine Air Cleaner – Check/Replace elementEngine Oil Filter Differential Pressure – CheckEngine Fuel Filter Differential Pressure – CheckDriven Equipment – Inspect/Check/LubricateDaily Engine Log Sheet – Daily recordings






Antifreeze Only) – Add conditioner Batteries – Clean/Inspect/Check electrolyte levelAlternator Belts – Inspect/Check/Adjust Fuel Tank – Drain water & sediment Initial Valve Lash/Bridge, and Injector Timing –


Every 176 000 L (46 500 gal)of Fuel or 1000 Hours*Engine Protective Devices – Inspect/Check Engine Fuel Filters – Replace Primary Fuel Filter – Clean Crankcase Breather – Clean Marine Gear Oil and Filter – Replace Marine Gear Strainer and Breather – Clean Marine Gear Output Shaft Seal – Lubricate Governor Air Actuator (if equipped) – Lubricate




Extender

Every 704 000 L (186 000 gal) of Fuelor 4000 Hours*Air Compressor (if equipped) – Inspect/Rebuild or


necessary


** For larger optional sump capacity of 400 L (l06 gal), these items occur at 500 hours. For larger optional sump capacity of 830 L (219 gal), these items occur at 1000 hours. Refer to the Operation and Maintenance Manual for the correct oil change interval for your specific engine.


27

3516 Marine Engines (rated up to 1300 rpm) continuedEvery 1 056 000 L (279 000 gal) of Fuel or 6000 Hours* Cooling System – Drain/Flush/Fill Thermostats – Replace Turbochargers – Inspect/Rebuild or Exchange if





necessary

Top End Every 1 942 000 L (512 500 gal) of Fuel or 11 000 Hours* Cylinder Head Assembly – Rebuild or ExchangeInjectors – Replace PAR Analysis – Obtain after Top End

OVERHAUL Every 3 844 000 L (1 025 000 gal) of Fuel or 22 000Hours*All Top End Items Connecting Rods – Inspect/Rebuild or Exchange if








necessary Piston Rings – Install New

Main Bearings – Install New Rod Bearings – Install New Crankshaft Seals – Install New Crankshaft – Inspect Camshaft – Inspect Cam Bearings – Inspect Damper – Inspect Fuel System Linkage (if equipped) – Inspect Gear Train – Inspect Gear Train Bushings/Bearings – Inspect Thrust Washers – Inspect Driven Unit Alignment – Inspect Oil Cooler – Clean/Test Aftercooler Core – Clean/Test Coolant Analysis – Obtain PAR Analysis – Obtain after Overhaul



28





Every 10 600 L (2800 gal) of Fuel or 50 Hours*Zinc Rods – Inspect/Replace Marine Gear Oil and Filter – Change oil on new/








Every 424 000 L (112 000 gal) of Fuelor 2000 Hours*Valve Lash/Bridge Adjustment – Check/AdjustTurbochargers – Inspect/Check Engine Mounts – Inspect/Check Damper – Inspect/Check



Extender

Every 848 000 L (168 000 gal) of Fuelor 4000 Hours*Air Compressor (if equipped) – Inspect/Rebuild or


necessary


** For larger optional sump capacity of 400 L (l06 gal), these items occur at 500 hours. For larger optional sump capacity of 830 L (219 gal), these items occur at 1000 hours. Refer to the Operation and Maintenance Manual for the correct oil change interval for your specific engine.


29

3516/3516B Marine Engines (rated 1301 to 1600 rpm) continuedEvery 1 272 000 L (336 000 gal) of Fuelor 6000 Hours* Cooling System – Drain/Flush/Fill Thermostats – Replace Turbochargers – Inspect/Rebuild or Exchange if





necessary









Inspect/Rebuild or Exchange if necessary





30





Every 12 900 L (3400 gal) of Fuel or 50 Hours*Zinc Rods – Inspect/Replace Marine Gear Oil and Filter – Change oil on new/








Every 516 000 L (136 000 gal) of Fuelor 2000 Hours* Valve Lash/Bridge Adjustment – Check/AdjustTurbochargers – Inspect/Check Engine Mounts – Inspect/Check Damper – Inspect/Check



Extender

Every 1 032 000 L (272 000 gal) of Fuelor 4000 Hours*Air Compressor (if equipped) – Inspect/Rebuild or


necessary




31

3516/3516B Marine Engines (rated 1601 to 1800 rpm) continuedEvery 1 548 000 L (408 000 gal) of Fuelor 6000 Hours*Cooling System – Drain/Flush/Fill Thermostats – Replace Turbochargers – Inspect/Rebuild or Exchange if





necessary









Inspect/Rebuild or Exchange if necessary


Piston Rings – Install New Main Bearings – Install New Rod Bearings – Install New Crankshaft Seals – Install New Crankshaft – Inspect Camshaft – Inspect Cam Bearings – Inspect Damper – Inspect Fuel System Linkage (if equipped) – Inspect Gear Train – Inspect Gear Train Bushings/Bearings – InspectThrust Washers – Inspect Driven Unit Alignment – InspectOil Cooler – Clean/Test Aftercooler Core – Clean/Test Coolant Analysis – Obtain PAR Analysis – Obtain after Overhaul



32

3606 Marine Engines (all rated rpms) Use fuel consumption, service hours, or time interval,whichever occurs first.


for leaks and loose connectionsEngine Oil, Engine Coolant, Marine Gear Oil***,

Air Starter Lubricator Oil, Air Prelube Pump Lubricator Oil, and Woodward EGB29P Actuator Oil (if equipped) – Check level

Air Filter Differential Pressure, Oil Filter DifferentialPressure, Fuel Filter Differential Pressure, and Driven Equipment – Check

Air Tank – Drain water and sediment Fuel Tank (Day Tank if equipped) – Drain water and

sediment

Every 14 200 L (3700 gal) of Fuel or50 Hours*Zinc Rods – Inspect/Replace


Obtain Cooling System – Test/Add supplemental coolant

additive (conditioner) if necessary

Every 284 000 L (75 000 gal) of Fuel or1000 Hours*Valve Lash, Injector Timing, Valve Bridge, and

Injector Synchronization (at initial 1000 hours only), Shutoff Controls and Alarms, 3161 GovernorOil Level (if equipped), Centrifugal Oil Filter Bearing, Exhaust System Leaks, and Air Filter Restriction – Inspect/Check

Oil Filters, Fuel Filters, Marine Gear Oil and Filter – Replace

Crankcase Breather System – CleanCentrifugal Oil Filters – CleanManual Barring Device – LubricateElectric Prelube Pump (if equipped) – LubricateFuel Control Linkage – LubricateFuel Sample – ObtainCoolant Sample – ObtainPrimary Fuel Filters – Drain waterFlywheel Ring Gear – Lubricate with MPGM

Every 568 000 L (150 000 gal) of Fuelor 2000 Hours*

Valve Lash, Injector Timing, Valve Bridge, and Injector Synchronization – Check/Adjust

Every 853 000 L (225 000 gal) of Fuelor 3000 HoursCooling System – Clean/Flush

Every 1 705 000 L (450 000 gal) of Fuel or 6000 Hours or Yearly*Water Temperature Regulators – Replace Oil Temperature Regulators – Replace PAR Analysis – Obtain

Every 2 130 000 L (562 500 gal) of Fuelor 7500 Hours or Yearly*Sea Water Pump – Rebuild or Exchange Water Pump Seals, Fuel Transfer Pump Seals,

Crankshaft Seals, Prelube Pump Brushes, Exhaust Shield, and Damper for Leakage – Inspect/Replace

Woodward EGB29P Actuator Oil (if equipped) – Replace

Woodward EGB29P Actuator Operation (if equipped) – Check for proper operation (reference SEBD9122)

TOP END OVERHAUL 5 500 000 L (1 500 000 gal) of Fuel or 20 000 HoursRemanufacture or Rebuild:

Cylinder Heads, Unit Injectors, Cylinder Head Intake and Exhaust Inserts, Cylinder Head Inner and Outer Valve Springs, Cylinder Head Valve Spring Guides, Cylinder Head Valve Locks, Cylinder Head Valve Rotocoils, Cylinder Head Intake Valves, Cylinder Head Exhaust Valves, Cylinder Head Dowels, Grind Valves and Seats (if not replaced), and Lap Valves and Seats (for full face contact)


33

3606 Marine Engines (all rated rpms) continuedReplace:

Cylinder Head Gaskets, Seals, O-Ring Seals and Plugs, Turbocharger Bearings, Bushings and Seals, Oil Pump Bushings and Seals, Fuel Transfer Pump Seals, Oil Cooler Seals and Regulators, Water Temperature Regulators and Seals, Oil Temperature Regulators and Seals, Exhaust Manifold Gaskets, Thermocouples (if equipped), Water Pump Bearing and Seals, Exhaust Shields, and Valve Lubricator Pump

Clean and Inspect:

Oil Cooler Core

Inspect/Replace:

Starter Brushes, Thrust Bearings (except crankshaft), Water Pump Idler Gear Bearings, and Camshaft Idler Gear Bearings

OVERHAUL Every 11 000 000 L (3 000 000 gal) of Fuel or 40 000 Hours Rebuild:

Vibration Damper Bearings and Fluid, Centrifugal Filter Bearings, Starters, Cylinder Head and Woodward Actuator

Replace:

Piston Rings, Connecting Rod Bearings, Main Bearings, Camshaft Bearings, Rocker Arm Bearings, Injectors, Aftercooler Core, Accessory Group Bearings, Front and Rear Gear Train Bearings, Cylinder Head Valves and Valve Guides, Exhaust Manifold Seals and Bellows, Exhaust Shields, Intake Air Lines Seals, Inlet and Outlet Water Temperature Regulators and Seals, Oil Temperature Regulators and Seals, Fuel Rack Bearings, 3161 Governor, and Cylinder Head Valve Spring Guides

Clean and Inspect:

Oil Cooler

Clean:

Lube Oil Suction Screen

Inspect/Replace:

Pistons, Piston Rods, Cylinder Liners, Crankshaft, Camshafts, Valve Mechanism Group, Front Gear Group, Rear Gear Group, Exhaust Manifolds, Shutoff Controls and Alarms, and Priority Valve

Replace Gaskets and Seals:

Crankcase Side Cover Group, Central Structure Cover Group, Camshaft Front Cover Group, Camshaft Drive Gear Cover Group, Front Housing Group, Gear Inspection Group, Rear Housing Group, Rear Structure Cover Group, Power Take-Off Cover Group, Priority Valve Group, Crankshaft, Valve Mechanism Cover Group, Oil Lines, All Water Lines, Oil Cooler, and Vibration Damper and Fuel Lines


** Scheduled Oil Sampling or Oil Analysis (including infrared analysis) should be the determining factor for oil change intervals.

*** See specifications of marine gear manufacturer for other maintenance.


34



for leaks and loose connectionsEngine Oil, Engine Coolant, Marine Gear Oiling***

Air Starter Lubricator Oil, Air Prelube Pump Lubricator Oil, and Woodward EGB29P Actuator Oil (if equipped) – Check level



sediment

Every 38 000 L (10 000 gal) of Fuel or50 Hours*Zinc Rods – Inspect/Replace




Every 375 000 L (100 000 gal) of Fuelor 1000 Hours*Valve Lash, Injector Timing, Valve Bridge, and

Injector Synchronization (at initial 1000 hours only), Shutoff Controls and Alarms, 3161 Governor Oil Level (if equipped), Centrifugal Oil Filter Bearing, Exhaust System Leaks, and Air Filter Restriction – Inspect/Check

Oil Filters, Fuel Filters, Marine Gear – ReplaceCrankcase Breather System – CleanCentrifugal Oil Filters – CleanManual Barring Device – LubricateElectric Prelube Pump (if equipped) – LubricateFuel Control Linkage – LubricateFuel Sample – ObtainCoolant Sample – ObtainPrimary Fuel Filters – Drain waterFlywheel Ring Gear – Lubricate with MPGM

Every 750 000 L (200 000 gal) of Fuel or 2000 Hours*Valve Lash, Injector Timing, Valve Bridge, and

Injector Synchronization – Check/Adjust

Every 1 137 000 L (300 000 gal) of Fuel or 3000 Hours*Cooling System – Clean/Flush

Every 2 274 000 L (600 000 gal) of Fuel or 6000 Hours or Yearly*Water Temperature Regulators – Replace Oil Temperature Regulators – Replace PAR Analysis – Obtain

Every 2 800 000 L (750 000 gal) of Fuelor 7500 Hours or Yearly*Sea Water Pump – Rebuild or Exchange Water Pump Seals, Fuel Transfer Pump Seals,




TOP END OVERHAUL 7 500 000 L (2 000 000 gal) of Fuel or 20 000 Hours Remanufacture or Rebuild:



35



Clean and Inspect:

Oil Cooler Core

Inspect/Replace:

Starter Brushes, Thrust Bearings (except Crankshaft), Water Pump Idler Gear Bearings, and Camshaft Idler Gear Bearings


Vibration Damper Bearings and Fluid, Centrifugal Filter Bearings, Starters, Cylinder Head, and Woodward Actuator

Replace:


Clean and Inspect:

Oil Cooler

Clean:


Inspect/Replace:








36



for leaks and loose connectionsEngine Oil, Engine Coolant, Marine Gear Oil***, Air

Starter Lubricator Oil, Air Prelube Pump Lubricator Oil and Woodward EGB29P Actuator Oil (if equipped) – Check level



sediment

Every 28 400 L (7500 gal) of Fuel or50 Hours*Zinc Rods – Inspect/Replace





Injector Synchronization (at initial 1000 hours only), Shutoff Controls and Alarms, 3161 GovernorOil Level (if equipped), Centrifugal Oil Filter Bearing, Exhaust System Leaks, and Air Filter Restriction – Inspect/Check



Every 1 136 000 L (300 000 gal) of Fuel or 2000 Hours*Valve Lash, Injector Timing, Valve Bridge, and



Every 3 411 000 L (900 000 gal) of Fuel or 6000 Hours or YearlyWater Temperature Regulators – Replace Oil Temperature Regulators – Replace PAR Analysis – Obtain

Every 4 260 000 L (1 125 000 gal) ofFuel or 7500 Hours or YearlySea Water Pump – Rebuild or Exchange Water Pump Seals, Fuel Transfer Pump Seals,




TOP END OVERHAUL 11 000 000 L(3 000 000 gal) of Fuel or 20 000 Hours Remanufacture or Rebuild:

Cylinder Heads, Unit Injectors, Cylinder Head Intake and Exhaust Inserts, Cylinder Head Inner and Outer Valve Springs, Cylinder Head Valve Spring Guides, Cylinder Head Valve Locks, Cylinder HeadValve Rotocoils, Cylinder Head Intake Valves, Cylinder Head Exhaust Valves, Cylinder Head Dowels, Grind Valves and Seats (if not replaced), and Lap Valves and Seats (for full face contact)


37



Clean and Inspect:

Oil Cooler Core

Inspect/Replace:

Starter Brushes, Thrust Bearings (except Crankshaft), Water Pump Idler Gear Bearings, and Camshaft Idler Gear Bearings



Replace:


Clean and Inspect:

Oil Cooler

Clean:


Inspect/Replace:








38



for leaks and loose connectionsEngine Oil, Engine Coolant, Marine Gear Oil***, Air

Starter Lubricator Oil, Air Prelube Pump Lubricator Oil, and Woodward EGB29P Actuator Oil (if equipped) – Check level



sediment

Every 37 900 L (10 000 gal) of Fuel or50 Hours*Zinc Rods – Inspect/Replace





Injector Synchronization (at Initial 1000 Hours Only), Shutoff Controls and Alarms, 3161 Governor Oil Level (if equipped), Centrifugal Oil Filter Bearing, Exhaust System Leaks, and Air Filter Restriction – Inspect/Check



Every 1 520 000 L (400 000 gal) of Fuel or 2000 Hours*Valve Lash, Injector Timing, Valve Bridge, and



Every 4 548 000 L (1 200 000 gal) ofFuel or 6000 Hours or Yearly*Water Temperature Regulators – Replace Oil Temperature Regulators – Replace PAR Analysis – Obtain

Every 5 700 000 L (1 500 000 gal) ofFuel or 7500 Hours or Yearly*Sea Water Pump – Rebuild or Exchange Water Pump Seals, Fuel Transfer Pump Seals,




TOP END OVERHAUL 15 000 000 L(4 000 000 gal) of Fuel or 20 000 Hours Remanufacture or Rebuild:



39


Cylinder Head Gaskets, Seals, O-Ring Seals and Plugs, Turbocharger Bearings, Bushings and Seals, Oil Pump Bushings and Seals, Fuel Transfer Pump Seals, Oil Cooler Seals and Regulators, Water Temperature Regulators and Seals, Oil TemperatureRegulators and Seals, Exhaust Manifold Gaskets, Thermocouples (if equipped), Water Pump Bearing and Seals, Exhaust Shields, and Valve Lubricator Pump

Clean and Inspect:

Oil Cooler Core

Inspect/Replace:

Starter Brushes, Thrust Bearings (except crankshaft), Water Pump Idler Gear Bearings, and Camshaft Idler Gear Bearings



Replace:

Piston Rings, Connecting Rod Bearings, Main Bearings, Camshaft Bearings, Rocker Arm Bearings, Injectors, Aftercooler Core, Accessory Group Bearings, Front and Rear Gear Train Bearings, Cylinder Head Valves and Valve Guides, Exhaust Manifold Seals and Bellows, Exhaust Shields, Intake Air Lines Seals, Inlet and Outlet Water Temperature Regulators and Seals, Oil Temperature Regulators and Seals, Fuel Rack Bearings, 3161 Governor, and Cylinder Head ValveSpring Guides

Clean and Inspect:

Oil Cooler

Clean:


Inspect/Replace:







LEXM6231-01 Printed in U.S.A.© 1996 Caterpillar Inc. All rights reserved.

Documents

Marine Engine Maintenance Schedules LEXM6231-01