TROUBLESHOOTING
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 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 hydrau-
lic oil with a foam depressant.
BREAKAGE OF PARTS INSIDE PUMP HOUSING
CAUSE REMEDY
Excessive pressure above maximum pump rating ................................Check relief valve setting.
Seizure due to lack of oil.......................................................................Check reservoir level, oil filter and possibility of
restriction in suction line more often.
Solid matter being wedged in pump......................................................Check suction line filter, drain and flush system as
necessary.
RT700 Series Page 5 - 23 Issued: August 2003
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