STEERING SYSTEM PRESSURE

HYDRAULIC SYSTEM

1. Park machine on level ground, set parking brake

and lower blade.

2. Remove top bulkhead cover and rear floor plate.

3. Install a 3000 psi (20000 kPa/200 kg sq/cm)

pressure gauge in test port on bottom of steering relief

valve.

4. With engine RPM at 2000, check steering relief

pressure by turning machine to a full lock (fully turned)

position and taking gauge reading.

Caution: Do not hold for more than 30 seconds.

5. If pressure is more than 50 psi (345 kPa/3.5 kg

/sq cm) above or below 2000 psi (13780 kPa/140 kg sq

cm), the steering relief valve should be adjusted.

6. Remove valve cap for access to adjusting screw.

7. Turn adjusting screw one quarter turn at a time, in

to raise pressure, or out to lower pressure.

8. Recheck steering relief pressure.

Dozer Relief Adjustment

9. If the pressure is satisfactory, tighten locknut and

replace cap.

7. Recheck relief valve pressure with engine RPM at

Caution: After steering valve or steering pump repair

2000 and dozer at maximum height.

or replacement, before starting engine, back off relief

8. If the pressure is satisfactory, tighten locknut and

valve until spring tension on adjusting screw is

replace cap.

relieved.

Caution: After valve or pump repair or replacement,

before stating engine, back-off relief valve until

spring tension on adjusting screw is relieved.

STEERING SYSTEM PRESSURE

TESTING AND ADJUSTMENT should be made every

400 hours after machine operation with hydraulic oil at

operating temperature.

Steering Relief Adjustment

Steering Relief Valve

Steering Relief

Rev.760501

K300

60-1.3