TROUBLESHOOTING
FAILURE OF PUMP TO DELIVER FLUID
CAUSE REMEDY
Pumps not engaged................................................................................Engage pumps.
Low fluid level in reservoir...................................................................Add recommended oil and check level.
Oil intake suction filter plugged............................................................Clean filter.
Air leak in suction line, preventing priming or causing
noise and irregular action of control circuit ..........................................Repair leaks.
Oil viscosity too heavy to pick up prime...............................................Use lighter viscosity oil. Follow recommendation for
temperatures encountered.
Broken pump shaft or parts broken inside pump ..................................Contact your local distributor; if necessary, refer to
the manufacturer’s manual for the correct instruc-
tions in pump disassembly and repair.
NO PRESSURE IN SYSTEM
CAUSE REMEDY
Pumps not engaged................................................................................Engage pumps.
Pump not delivering oil for any of
the reasons listed previously .................................................................Follow remedies given previously.
Relief valve not functioning due to:
Valve setting not high enough...............................................................Increase pressure setting of valves.
Valve leaking.........................................................................................Check seat for score marks and reseat.
Spring in relief valve broken.................................................................Replace spring and readjust valve.
Internal leakage in control valves or cylinders......................................To determine location, progressively block off vari-
ous parts of circuit. When trouble is located, repair.
(Do not block between pump and relief valve).
SWING CIRCUITPUMPS
RT700 Series Page 5 - 21 Issued: August 2003
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