Troubleshooting 21 - Woods BH90-X Operator's Manual

PROBLEM
Noisy pump caused by cavitation
Oil heating
Shaft seal leakage
Foaming oil
Boom drops as dipper or bucket
cylinder lever is activated while
boom control is in raised position
Jerky operation
MAN0451 (6/2/2006)
TROUBLESHOOTING
POSSIBLE CAUSE
Oil too heavy
Oil filter plugged
Suction line plugged or too small
Suction line kinked
Oil supply low
Contaminated oil
Setting of relief valve too high or
too low
Pump operating too fast
Worn shaft seal
Low oil level
Air leaking into suction line
Wrong kind of oil
Moisture in oil
Load check valve leaking
Hydraulic hoses plumbed
incorrectly
Change to proper viscosity.
Replace filter.
Clean line and check for size.
Replace line.
Fill reservoir.
Drain reservoir, change filter, and
refill with clean oil.
Set to correct pressure.
Do not exceed 540 rpm PTO
speed.
Replace shaft seal.
Fill reservoir.
Tighten fittings.
Drain and refill reservoir with non-
foaming oil.
Keep oil temperature below 180°
and continue to operate as oil
dries out, or replace oil and purge
system if foaming is excessive.
Clean or replace check valve
assembly.
Check hydraulic plumbing
schematic and correct hose
routing as required.

Troubleshooting 21

SOLUTION