Service Manual

Hydraulic System
8.22
Model 8042, 10042, 10054 Legacy Rev. 10/03
8.8.3 Boom Retract Circuit and Troubleshooting
(Refer to Section 8.8.22, “Boom Extend/Retract Circuit Description,” for a more detailed explanation of this
circuit.)
IN
T
T
AT TAC H
TILT
P
FRAME
SWAY
EXT/RET
LFT/LWR
AUX
HYDRAULIC
OIL COOLER
HYDRAULIC RESERVOIR
PUMP
MAIN CONTROL VALVE
EXTEND/
RETRACT
CYLINDER
RETURN
FILTER
E
R
Suction
Return
Load Sense
Pressure
10054 ONLY
EXTEND
LOCKOUT
VALVE
T
V
C
MH3530