Advertisement
HYDRAULIC GEAR PUMP
2)
Problem
Pump does not develop full
pressure
Pump will not pump oil
Noisy pump caused by
cavitation
Oil heating
Foaming oil
Shaft seal leakage
C
C
ause
System relief valve set too low or
leaking.
Oil viscosity too low.
Pump is worn out.
Reservoir low or empty.
Suction strainer clogged.
Oil too thick.
Oil filter plugged.
Suction line plugged or too small.
Oil supply low.
Contaminated oil.
Setting of relief valve too high or too
low.
Oil viscosity too low.
Low oil level.
Air leaking into suction line.
Wrong kind of oil.
Worn shaft seal.
Worn shaft in seal area.
6-11
Remedy
Check system relief valve for proper
setting.
Change to proper viscosity oil.
Repair or replace pump.
Fill reservoir to proper level.
Clean suction strainer.
Change to proper viscosity.
Clean filters.
Clean line and check for proper size.
Fill reservoir to proper level.
Drain reservoir and refill with clean oil.
Set to correct pressure.
Drain reservoir and fill with proper
viscosity.
Fill reservoir to proper level.
Tighten fittings, check condition of
line.
Drain reservoir, fill with non-foaming
oil.
Replace shaft seal.
Replace drive shaft and seal.
Advertisement
