STEERING
6C-5
SECTION 6C. STEERING UNIT
GENERAL
The power steering unit uses hydraulic pressure pro-
duced by the hydraulic traction pump. A pressure relief
valve located in the traction pump protects the steering
system from pressure damage. The relief valve is fac-
tory set at 1160 psi (7998 kPa).
Power steering is available as long as the engine is
running. The machine can be steered manually without
assistance from the hydraulic system.
REMOVAL
NOTE:
If available, use a portable hydraulic filtering unit
to remove the hydraulic oil from the hydraulic
tank. Place the filtering unit suction hose in the
tank and pump the oil into a clean and sealable
container.
If a portable filter is not available, an adjustable
vacuum pump can be installed on the hydraulic
tank fill port and vacuum applied to prevent leak-
ing during hydraulic system service and repair.
If a drain pan is used to drain the hydraulic tank,
dispose of the hydraulic oil and fill with clean oil
when service or repair is completed.
1. Using a portable filtering unit, vacuum pump, or
suitable container, drain the hydraulic oil or install
a vacuum pump on the hydraulic tank fill port.
2. Tag and remove the hoses from the bottom of the
steering valve. Immediately plug the hoses and
valve to prevent contamination of the hydraulic
system (Figure 6C-1).
3. Tilt the steering unit all the way toward the rear of
the machine.
4. Remove the steering tower cover (Figure 6C-1).
5. Remove the steering wheel cap, nut, and lock
washer (Figure 6C-1).
6. Remove the steering wheel (Figure 6C-1).
7. While supporting the steering valve, remove the
steering valve mounting nuts at the mounting
bracket (Figure 6C-1).
8. Remove the steering valve from the steering unit
(Figure 6C-1).
Figure 6C-1. Steering Unit Removal and Installation
Steering Valve
Steering Valve
Mounting Nuts
6C
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