Lull 944E-42 Service Manual - Manual (Page 316)

Hydraulic System
8.64 Model 644E-42/944E-42 Rev. 6/04
8.8.5 Joystick Circuit & Troubleshooting (Rear - Dual Joystick)
(Refer to Section 8.8.48, “Joystick Circuit Description (Dual Joystick),” for a more detailed explanation of
this circuit.)
Suction
Return
Load Sense
Pressure
Pilot Pressure
PUMP
HYDRAULIC
RESERVOIR
ATTACH
TILT
FRAME
EXT/RET LFT/LWR
AU
X
TRANS
ACCUMULATOR
CHARGE/SECONDARY
FUNCTION VALVE
LS
DRAIN P1
LSG ACR
SW P
ACF EF CF PIL PB
PBG
PPG
SW
MAIN CONTROL
VALVE
INLET
OUTLET
HYDRAULIC OIL
COOLER
REAR JOYSTICK
3
T
P
4
1 2
CHECK VALVE
85 PSI (5,9 bar)
RETURN
FILTER
25 PSI
(1,7 BAR)
BYPASS
CHECK
VALVE
MU0711
Pressure
Reducing
Cartridge
“PPG”
Pressure
Tap
“P1”
Pressure
Tap