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740 ARTIICULATED TRUCKPOWER TRAIIN slidehydraulic fundamentaltransmission hidraulic systemTORQUE CONVERTER LOCKUP
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740
777744440000 AAAARRRRTTTTIIIICCCCUUUULLLLAAAATTTTEEEEDDDD TTTTRRRRUUUUCCCCKKKKPPPPOOOOWWWWEEEERRRR TTTTRRRRAAAAIIIINNNN
2001 Caterpillar Inc.
CDOWNSHIFTSOLENOID
UPSHIFTSOLENOID
FILTERROTARY
ACTUATOR
SELECTORVALVEGROUP
ROTARYSELECTOR
SPOOL
NEUTRALIZERVALVE
PRIORITYREDUCTION
VALVE
LUBERELIEF VALVE
RELIEFVALVE
A
B
D
E
F
G
H
PUMPPRESSURE
DOWNSHIFTPRESSURE
PILOT OILPRESSURE
LUBEPRESSURE
740 TRANSMISSIONHYDRAULIC SYSTEM
NEUTRALUPSHIFT
PRESSURE
ON
PRESSURE CONTROLGROUP
T/C LOCKUPSOLENOID
TORQUE CONVERTERSUMP
TRANSMISSIONPUMP
CHARGEPUMP
MAGNETICSCREEN
SOLENOIDVALVE
PRIORITYVALVE
RELIEFVALVE
INTERAXLEDIFFERENTIAL
TRANSFERGEAR
AXLE AXLE AXLE
OUTPUT TRANSFER GEAR HYDRAULIC CIRCUITDIFFERENTIAL LOCKS RELEASED
SOLENOIDVALVE
CHARGEPUMP
MAGNETICSCREEN
SOLENOIDVALVE
PRIORITYVALVE
RELIEFVALVE
INTERAXLEDIFFERENTIAL
TRANSFERGEAR
AXLE AXLE AXLE
OUTPUT TRANSFER GEAR HYDRAULIC CIRCUITINTERAXLE LOCK ENGAGED
SOLENOIDVALVE
CHARGEPUMP
MAGNETICSCREEN
SOLENOIDVALVE
PRIORITYVALVE
RELIEFVALVE
INTERAXLEDIFFERENTIAL
TRANSFERGEAR
AXLE AXLE AXLE
OUTPUT TRANSFER GEAR HYDRAULIC CIRCUITINTERAXLE AND DIFFERENTIAL LOCKS ENGAGED
SOLENOIDVALVE
CDOWNSHIFTSOLENOID
UPSHIFTSOLENOID
TORQUE CONVERTERSUMP
TRANSMISSIONPUMP
FILTERROTARY
ACTUATOR
SELECTORVALVEGROUP
ROTARYSELECTOR
SPOOL
NEUTRALIZERVALVE
PRIORITYREDUCTION
VALVE
LUBERELIEF VALVE
RELIEFVALVE
A
B
D
E
F
G
H
PUMPPRESSURE
DOWNSHIFTPRESSURE
PILOT OILPRESSURE
LUBEPRESSURE
740 TRANSMISSIONHYDRAULIC SYSTEM
NEUTRALUPSHIFT
PRESSURE
ON
PRESSURE CONTROLGROUP
T/C LOCKUPSOLENOID
JI
H
GF
E
D
C
B
A
10 9 8 7 6 4 3 2 1
GND VERIFYGEAR 5GEAR 4+ BATT
GEAR 3GEAR 2GEAR 1
GROUND
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10
TRANSMISSIONGEAR POSITION
SWITCH
CA
B
D
E
F
G
H
TRANSMISSION PRESSURECONTROL VALVE
NEUTRAL
FROM SELECTORAND PRESSURE
CONTROL VALVE
MODULATIONREDUCTION VALVE
(STATION DFOR T/C LOCKUP CLUTCH)
MODULATIONREDUCTION VALVES
(STATIONS A, B, C, E, F, G AND HFOR TRANS. PLANETARY)
FROM SELECTOR AND
PRESSURE CONTROLVALVE
LOAD PISTONBODY
FROM SELECTOR ANDPRESSURE
CONTROL VALVEPUMP
PASSAGEPRESSURE
CONTROL VALVE
LOAD PISTONORIFICE
TOTANK
TO TANK
PISTONPASSAGE SELECTOR
PISTONLOAD
PISTONMODULATION
REDUCTION VALVE
FROM SELECTIONAND PRESSURE
CONTROL VALVE
TRANSMISSION PLANETARYVALVE STATION
CLUTCH FILLING
TRANSMISSION PLANETARYVALVE STATION
CLUTCH ENGAGED
TO TRANSMISSIONLUBE
TRANSMISSION PLANETARYVALVE STATION
CLUTCH DECAY
DECAYORIFICE
FROMT/C LOCKUPSOLENOID
TO TANK
FROMSELECTOR AND
PRESSURECONTROL VALVE
LOAD PISTONORIFICE
BALLCHECKVALVE
MODULATIONREDUCTION
VALVE
SELECTORPISTON
LOADPISTON
TORQUE CONVERTER LOCKUP VALVE STATION
ROTARYSELECTOR
SPOOLNEUTRALIZERVALVE
PRIORITYREDUCTION
VALVE
LUBERELIEF VALVE
RELIEF VALVE
LUBRICATIONPRESSURE TAP
PILOT OILPRESSURE TAP
SCREEN
TO TRANSMISSIONPRESSURE
CONTROL VALVE
TO TRANSMISSIONPRESSURE
CONTROL VALVE
FROMTRANSMISSION
PUMP
740 TRANSMISSIONSELECTOR VALVE GROUP
NEUTRAL
ON
DOWNSHIFTSOLENOID
UPSHIFTSOLENOID
FROM TRANSMISSIONOIL FILTER
ROTOR
ROTARYVANE
STATIONARYVANE
UPSHIFTVALVE
BALL
BALL
TOTANK
DOWNSHIFTVALVE
12
3
45 6 7
RN
TRANSMISSION ROTARY ACTUATOR