Ashland 1200 TR - Manual (Page 34)

34
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.