PUMP MAKING NOISE Pump disconnect
notengaged
Shut engine off and engage
pump disconnect
Partially clogged intake line,
intake filter or restricted
intake pipe
Clean out intake filter screen
or eliminate restriction. Be
sure suction line is
completely open
Air leaks:
At pump intake pipe joints
Test by pouring oil on joints
while listening for change in
sound of operation. Tighten
as required
Air drawn in through inlet
opening
Check and add oil to
reservoir if necessary
Air bubbles in oil Use hydraulic oil containing a
foam depressant
Too high oil viscosity Work only with oil at
recommended operation
temperature
Oil intake suction filter
plugged
Clean filter
Rag, paper, etc., pulled into
suction line or pump
Remove
Worn or broken parts Replace
EXTERNAL OIL LEAKAGE
AROUND PUMP
Shaft seal worn causing oil to
leak into gear drive housing
Replace
Loose fitting on pump intake
or discharge
Keep all joints tight
Damaged “O” ring seals
between pump sections
Replace
Damaged “O” rings at fittings Replace
EXCESSIVE WEAR Abrasive matter in the
hydraulic oil being circulated
through the pump
Clean suction filter and
replace return filter. Drain &
flush system as necessary
Viscosity of oil too low at
working conditions1
Check oil recommendation
Sustained high pressure
above maximum pump rating
Check relief valve setting
Air recirculation causing
chatter in system
Check for air being drawn
into system. Use hydraulic oil
with a foam depressant
RT500
Troubleshooting
224 REVISED:
To Next Page
Loading...
Need help?
General
