TM 5-3805-281-24-1
Theory of Operation
NOTE: Numbers 1 thru 12 are used on the schematic
only to show the connections for pilot lines from
flow regulator to left and right control valve pilot caps.
Numbers not used on the machine
TO
HYDRAULIC
OIL TANK
TO RIGHT
PILOT PRESSURE
CONTROL VALVE
REGULATING VALVE
FROM
HYDRAULIC
OIL TANK
PILOT
FILTER
PILOT FILTER
PILOT PUMP
BYPASS VALVE
TO SYSTEM
TO PUMP
FROM ARM
RELIEF VALVE
REGULATORS
REDUCED
LEAKAGE VALVE
DP DG
SG
SE
SD
PF
TO FRONT
AND REAR PUMP
PG
REGULATORS
9025
05
TO SWING
104
PARK BRAKE
PI
RELEASE
POWER
SPEED
VALVE
BOOST
SENSING
FROM ARM
REGENERATIVE
TO REAR
PH
VALVE
PUMP CONTROL
DD
VALVE IN LEFT
ARM
CONTROL VALVE
REGENERATIVE
DE
PE
TO FRONT
PROPEL
PUMP CONTROL
FROM BUCKET
SPEED
VALVE IN RIGHT
FLOW CONTROL
CHANGE
CONTROL VALVE
PILOT VALVE B
VALVE
MANIFOLD
DS DH
SI
TO HYDRAULIC
SC
PD
OIL TANK
TO ARM
FROM BUCKET
TO PROPEL
PILOT OIL
REGENERATIVE
FLOW CONTROL
SPEED CHANGE
RETURN OIL
VALVE
PILOT VALVE A
VALVE
PILOT PRESSURE REGULATING AND SOLENOID VALVES SCHEMATIC
T114641
CED,TX08227,3046
1931MAR982/2
6-103
