TM 5-3805-281-24-1
Theory of Operation
HYDRAULIC PUMP REGULATOR OPERATION
FROM SOLENOID
27 PILOT OIL
VALVE MANIFOLD
28 REDUCED PILOT OIL
1
29 REAR PUMP SUPPLY OIL
30 FRONT PUMP SUPPLY OIL
CONTROL VALVE
31 CONTROL VALVE
NEUTRAL PASSAGE 2
NEUTRAL PASSAGE OIL
32 TRAPPED OIL
REAR PUMP 3
33 RETURN OR PRESSURE
CONTROL
REMOTE
FREE OIL TO SERVO
VALVE
CONTROL
PISTON
SPOOL
REMOTE
LARGE END 4
CONTROL 7 PISTON
5
SLEEVE
26 PRESSURE
6
SENSOR
RETURN
TO PUMP
8 PILOT OIL
HOUSING 14
INLET
SPEED SENSE 13
9025
SIGNAL PORT
05
19
PUMP PRESSURE 12
INLET
9 LOAD SLEEVE
LOAD PISTON 11
15 FEEDBACK LINK
LOAD SPOOL 10
16 TO LEFT CONTROL VALVE
TO FRONT PUMP
TO RIGHT CONTROL VALVE 25
17 REGULATOR
FROM FRONT PUMP 24
REGULATOR
18
PILOT
PUMP
19
22
23
PILOT
20
FRONT
PRESSURE
SERVO
REAR
PUMP
REGULATING
PISTON
PUMP
21
VALVE
SERVO
PISTON
34 REGULATOR OPERATION
T114808
Continued on next page
CED,TX08227,3092
1918APR981/2
