STMG 746 10/02
- 133 -
TST 1
TST 2
ALL WHEEL STEER SYSTEM
THERMAL RELIEF VALVE
IRM LEFT VALVE
HOLD
ALL WHEEL STEER CONTROL VALVE GROUP
CIRCLE STEER VALVE
IRM SHUTOFF VALVE
RESOLVER
IRM RIGHT VALVE
PILOT POPPET VALVES LOCK VALVE
RESOLVER
PILOT POPPET VALVES
REAR AXLE
FROM STABILIZER VALVE GROUP
CROSSOVER LINE RELIEF VALVES
TO BACKHOE VALVE GROUP RETURN
AUXILIARY LOADER VALVE GROUP
FRONT AXLE
STEERING METERING UNIT
BACK FLOW CHECK VALVE
TILT LIFT SIGNAL
TO STABILIZER VALVE GROUP STEERING PRIORITY VALVE TO BACKHOE VALVE GROUP
TO BRAKE VALVE
102 All Wheel Steer System (AWS) • All Wheel Steer
The All Wheel Steer (AWS) system is similar to what was used on the "C" Series machines. Operation of the AWS valve is the same. The major differences between the models are: - Since the "D" Series AWS system uses non-boosted brakes, a steering and brake resolver is no longer in the signal line between the steering priority valve and the SMU. - Due to the reverse signal network, the lines routing between the valve sections has changed. - The switch to control AWS has been changed to two separate buttons as shown earlier.
