TROUBLESHOOTING
NO PRESSURE IN SYSTEM (CONTINUED)
CAUSE REMEDY
Relief valve not functioning due to:
Cold fluid...............................................................................................Warm up system. Work with oil at recommended
operating temperature range.
(See Operation section).
Air leak or restriction at inlet line .........................................................Repair or clean.
Internal parts of pump are worn excessively.........................................Replace pump.
PUMP MAKING NOISE
CAUSE REMEDY
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 restric-
tion. 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 tem-
perature.
Oil intake suction filter plugged............................................................Clean filter.
Rag, paper, etc., pulled into suction line or pump.................................Remove.
Worn or broken parts.............................................................................Replace.
RT700 Series Page 5 - 22 Issued: August 2003
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