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SYMPTOM
Hydraulics overheat.
Foaming oil.
Hydraulic pump leaking.
Excessive pump noise.
LeeBoy Model 695 Motor Grader
Table 5-3. Troubleshooting Chart (Cont.)
CAUSE
Excessive load.
Oil cooler clogged.
Low oil level.
Using low viscosity oil in summer.
Transmission or hydraulic internal
leakage.
Oil level is too high or too low.
Incorrect type of oil.
Pump suction screen restricted.
Air leakage on suction side of pump.
Cap screws holding pump housing
together are loose.
Worn shaft seal.
Low oil level.
Transmission or hydraulic filter
restricted.
Aeration of oil - charge side leaking.
Oil lines contacting operator's station
or frame (clamps or isolators).
Worn transmission pump, loose pump
drive coupling, loose pump attaching
hardware, leakage in hydraulic
system (pump remains in stroke),
or misalignment between pump and
engine.
Maintenance
REMEDY
Reduce load.
Clean oil cooler and measure air flow.
Fill the hydraulic oil reservoir to the correct
level.
Drain, flush, and fill the hydraulic oil
reservoir with the correct oil. Replace the
oil filter.
See your authorized dealer.
Adjust oil level to full mark on dipstick.
Drain, flush, and fill the hydraulic oil
reservoir with the correct oil. Replace the
oil filter.
Clean the screen.
Tighten fittings and inspect hoses for
damage. Replace damaged hoses.
Tighten screws to torque specification.
See your authorized dealer.
Fill the hydraulic oil reservoir to the correct
level.
Replace filter.
Tighten fittings and inspect hoses for
damage. Replace damaged hoses.
Inspect lines, clamps, and isolators. Repair
or replace as required.
See your authorized dealer.
5 5
5-49
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