Trouble shooting your hydraulic system – Ashland 1200 TR User Manual

Page 34

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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.

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