23 Dec 2004 PDF File

Hydraulics

Version 1

Problem

Possible Cause

Correction

Cavitation

Oil too heavy

Oil filter plugged

Suction line plugged or too small

Change to proper viscosity

Clean filter

Clean line and check size of line

Oil heating

Oil supply low

Contaminated oil

Setting of relief valve too high or too low

Oil in system too light

Fill reservoir

Drain reservoir and refill with clean oil

Set to correct pressure

Drain reservoir and refill with proper viscosity oil

Shaft seal leakage

Worn shaft seal

Worn shaft in seal area

Debris in shaft seal suction side drain holes

Replace shaft seal

Replace drive assembly

Disassemble pump and inspect

Foaming oil

Low oil level

Air Leaking into suction line

Wrong kind of oil

Fill reservoir

Tighten fittings

Drain and fill reservoir with non-foaming oil