Lull 944E-42 Service Manual - Manual (Page 312)

Hydraulic System
8.60 Model 644E-42/944E-42 Rev. 6/04
8.8.3 Pump & Cooling Circuit & Troubleshooting (Single Joystick)
(Refer to Section 8.8.47, “Pump and Cooling Circuit Description (Single Joystick),” for a more detailed
explanation of this circuit.)
RETURN
FILTER
25 PSI
(1,7 BAR)
BYPASS
CHECK
VALVE
SINGLE
JOYSTICK
PILOT
SELECT
VALVE
P1 TB
TA
AUX2
AUX1
EB
EA
HB
HA
CTB
CTA
T P
P2 P3 P4
SINGLE
JOYSTICK
HYDRAULIC OIL
COOLER
CHECK VALVE
85 PSI (5,9 bar)
HYDRAULIC
RESERVOIR
Suction
Return
Load Sense
Pressure
Pilot Pressure
1
3
T
P
4
2
MAIN CONTROL
VALVE
INLET
OUTLET
BRIDGE DRAIN
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
FRAME
SWAY
JOYSTICK P
T
2 1
PUMP
MU5430