Trouble shooting your hydraulic system – Ashland 1200 TR User Manual
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TROUBLE SHOOTING YOUR HYDRAULIC SYSTEM
PROBLEM
POSSIBLE CAUSES
REMEDY
Excessive wear of pump Sustained high pressure
Check relief valve maximum
parts
above maximum pump rating
setting
Drive misalignment
Check and correct
Air recirculation causing
Check air problems in pump
chatter in system
making noise
Abrasive material in the oil
Clean or replace filter and
change oil
Viscosity of oil too low at
Check recommendations
working conditions
Breakage of inside pump Excessive pressure above
Check relief valve maximum
housing
pump rating
setting
Seizure due to lack of oil
Check reservoir level, oil filter
and possibility of restriction in
suction line.
External oil leakage
Shaft packing or seals worn
Replace
around pump shaft or
housing
Damaged head packing seals
Replace
Excessive case pressure due
Check case drain line for a
to restricted case drain flow
restriction and remove. Drain
(back to tank)
line may be too small; if small,
line is creating back pressure,
replace with larger line.
Excessive case pressure due
Repair pump for excessive
to excessive drain flow
leakage from pumping element
to case
Cracked housing
Replace all damaged parts
and seals.