Lull 944E-42 Service Manual - Manual (Page 384)

Hydraulic System
8.132 Model 644E-42/944E-42 Rev. 6/04
8.8.39 Auxiliary Hydraulic Circuit & Troubleshooting
(Male Coupler Pressurized - Single Joystick) (644E-42, SN 0160003109 & After)
(944E-42, SN 0160003107 & After)
(Refer to Section 8.8.62, “Auxiliary Hydraulics Circuit Description (Single Joystick),” for a more detailed
explanation of this circuit.)
INLET
OUTLET
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
RETURN
FILTER
25 PSI
(1,7 BAR)
BYPASS
CHECK
VALVE
SINGLE
JOYSTICK
HYDRAULIC OIL
COOLER
CHECK VALVE
85 PSI (5,9 bar)
HYDRAULIC
RESERVOIR
Suction
Return
Load Sense
Pressure
Pilot Pressure
PUMP
1
3
T
P
4
2
P4 P3
P
P2
T
EB
EA
HB
HA
CTB
CTA
SINGLE
JOYSTICK
PILOT
SELECT
VALVE
P1 TB
TA
AUX2
AUX1
AUXILIARY
COUPLERS
MAIN
CONTROL
VALVE
MU6460
Relief
Valve
Female
Coupler
Male
Coupler
Main
Relief
Valve
Implement
Pump
Pressure
Tap
Pressure
Reducing
Cartridge
“PPG”
Pressure
Tap
Unloader
Cartridge
Pilot
Supply
Line