TM 5-3805-281-24-1
Theory of Operation
CONTROL VALVE PILOT CIRCUIT OPERATION
9025
05
42
A--Right Propel Valve
G--Arm II Valve
M--Arm I Valve
S--Control Valve Pilot
B--Bucket Flow Control
H--Bucket Flow Control
N--Arm Rod End Reduced
Circuits
Pilot Valve B
Pilot Valve A
Leakage Pilot Valve
C--Bucket Valve
I--Bypass Shut-Off Valve
O--Boom II Valve
D--Boom I Valve
J--Warm-Up and Air Bleed
P--Auxiliary Valve
E--Boom Reduced
Circuit
Q--Propel Flow Control
Leakage Pilot Valve
K--Swing Valve
Valve
F--Boom Manual Lower
L--Arm Head End Reduced
R--Left Propel Valve
Release Screw
Leakage Pilot Valve
Continued on next page
CED,TX08227,3120
1905MAY981/2