773E COOLING SYSTEM FLOW

THERMOSTAT RADIATOR
HOUSING

ENGINE BLOCK

ATAAC
ENGINE OIL COOLER

HOIST AND BRAKE

OIL COOLER

TRANSMISSION AND
TORQUE CONVERTER
OIL COOLER WATER PUMP
 775E COOLING SYSTEM FLOW
THERMOSTAT RADIATOR
AFTERCOOLER HOUSING

ENGINE BLOCK

ENGINE OIL COOLER

HOIST AND BRAKE

OIL COOLER

TRANSMISSION AND
TORQUE CONVERTER
OIL COOLER WATER PUMP
 STEERING HYDRAULIC SYSTEM

STEERING L
TANK T
CASE LS
DRAIN P
FILTER STEERING R
FILTER HMU

STEERING
PUMP

LOAD
PRESSURE
SENSING
REDUCING
VALVE
VALVE
STEERING PRESSURE
SWITCH

SECONDARY STEERING PUMP PRIMARY STEERING

LOAD SENSING
BACK-UP RELIEF VALVE
RESOLVER VALVE
SECONDARY STEERING
STEERING VALVE BACK-UP RELIEF VALVE
(REAR VIEW)
SECONDARY STEERING VALVE PRIMARY
CHECK VALVE (FRONT VIEW) CHECK VALVE
 STEERING HYDRAULIC
SYSTEM TO STEERING
VALVE
TO LOAD SENSING
RESOLVER

CROSSOVER
RELIEF VALVES

PISTON PUMP AND

LOAD SENSING
CONTROLLER
HMU

PRESSURE LOAD SENSING

REDUCING RESOLVER
VALVE

STEERING
PRESSURE
SWITCH LOAD
SENSING
VALVE DETAIL A

STEERING M
VALVE
TRANSMISSION
PRIMARY CHASSIS
SEE
STEERING ECM
DETAIL A
BACK-UP
RELIEF VALVE

STEERING
FILTER SECONDARY SECONDARY SECONDARY
STEERING STEERING STEERING
BACK-UP RELIEF PRIMARY RELIEF PUMP
VALVE VALVE
CASE DRAIN
FILTER
 SERVICE / RETARDER BRAKE SYSTEM RELIEF
VALVE
FRONT BRAKE VALVE OFF
SERVICE BRAKES ENGAGED
RETARDER RELEASED AIR TANK
(SERVICE)
ARC OFF

DRAIN VALVE
CAB ENCLOSURE

FRONT BRAKE RETARDER RELAY

RELAY
ON/OFF VALVE AIR VALVE
VALVE
SERVICE PRESSURE RELAY (SERVICE/
VALVE (ARC)
BRAKE FRONT BRAKE SENSOR VALVE RETARDER)
CONTROL RATIO VALVE (FRONT)
VALVE

PRESSURE
PROTECTION
VALVE

BRAKE BRAKE
CYLINDER CYLINDER
( FRONT ) ( REAR )

ARC
VALVE STOP LIGHT
RETARDER AND
SWITCH TRANSMISSION
SERVICE/RETARDER
SWITCH
 PARKING/SECONDARY BRAKE SYSTEM
SECONDARY BRAKES ENGAGED

RELAY DOUBLE
VALVE CHECK
PARKING (FRONT) VALVE
PARKING/
BRAKE SECONDARY
AIR SWITCH BRAKE
SWITCH BRAKE
CYLINDER
( FRONT )
BRAKE
INVERTER RELEASE
VALVE VALVE

SECONDARY
BRAKE
VALVE

PARK BRAKE
HOIST VALVE
RESET VALVE
PILOT SUPPLY