1. Install a 3000 psi (20,000 kPa/200 kg sq/ cm)
pressure gauge in dozer hydraulic system test port on
CHECK HYDRAULIC TANK OIL LEVEL daily with
front frame bulkhead at dozer cylinder hose.
machine level, blade lowered and engine off. The level
gauge is mounted on the forward surface of the hydraulic
2. With engine RPM at 2000, check relief valve
tank on the operator's left. Add the proper fluid as
pressure by raising dozer blade to maximum height and
taking gauge reading.
Caution: Do not hold for more than 30 seconds.
3. If pressure is more than 50 psi (345 kPa/3,5
kg/sq. cm.) above or below 1500 psi (J0335 kPa/106
kg/sq cm), the relief valve should be adjusted.
Hydraulic Oil Level Gauge
CHECK ALL HOSES AND CONNECTIONS every 50
hours for leaks, correcting where necessary. Damaged
hoses should be replaced immediately.
4. Remove acorn cap on relief valve.
DOZER SYSTEM PRESSURE:
5. Loosen jam nut.
6. Turn adjusting screw one quarter turn at a time, in
TESTING AND ADJUSTMENT should be made every
to raise pressure, or out to lower pressure.
400 hours after machine operation with hydraulic oil at
Dozer ReIief Adjustment
Dozer System Pressure Test