LOAD KING 80-160, Operator'S Manual

Page: 313 / 369

313
PUMP MAKING NOISE
CAUSE REMEDY
Pump disconnect not engaged 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
CAUSE REMEDY
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
CAUSE REMEDY
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 conditions 1 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