Lull 944E-42 Service Manual - Manual (Page 320)

Hydraulic System
8.68 Model 644E-42/944E-42 Rev. 6/04
8.8.7 Park Brake Circuit & Troubleshooting
(Refer to Section 8.8.50, “Brake Circuit Description,” for a more detailed explanation of this circuit.)
Suction
Return
Load Sense
Pressure
Pilot Pressure
FRONT AXLE
HYDRAULIC
RESERVOIR
PUMP
ACCUMULATOR
CHARGE/SECONDARY
FUNCTION VALVE
LS
DRAIN P1
LSG ACR
SW P
ACF EF CF PIL PB
PBG
PPG
SW
Suction
Return
Load Sense
Pressure
Pilot Pressure
FRONT AXLE
HYDRAULIC
RESERVOIR
PUMP
ACCUMULATOR
CHARGE/SECONDARY
FUNCTION VALVE
LS
DRAIN P1
LSG ACR
SW P
ACF EF CF PIL PB
PBG
PPG
SW
CV2
CV2
MU5750
Pressure Reducing
Cartridge
Parking Brake
Solenoid Valve
“PBG”
Pressure Tap
Pressure Reducing
Cartridge
“PBG”
Pressure Tap
Parking Brake OFF (Oil Pressure to Parking Brake)
Parking Brake ON (No Oil Pressure)
Parking Brake
Solenoid Valve
“CV2”
Check Valve
“CV2”
Check Valve