36
2 MAINTENANCE
TROUBLESHOOTING CHART
CAUSE
( 1 ) Partly clogged intake strainer or
restricted intake pipe
( 2) Defective bearing
( 3) Air leak at pump intake pipe joints
( 1) Seal worn or damaged
( 1) Continuous running
( 2) Undersized hydraulic lines
( 3) High ambient temp in relation to
oil temp.
( 4) Excessive system leakage
( 1) Abrasive matter in the hydraulic oil
being circulated through pump
( 2) Viscosity of oil too low at working
conditions
( 3) Pressure too high
( 4) Air recirculation causing pump noise
( 1) Valve sticking or binding
( 2) Viscosity of oil too high
( 3) Air in system
( 4) Low oil
( 5) Low voltage
SOLUTION
( 1A) Pump must receive intake fluid
freely or cavitation results. Drain system,
clean intake pipe and clean or replace
strainer
( 2A) Replace pump
( 3A) Tighten joints as required.
( 1A) Replace seals or pump.
( 1A) When over 140 degrees F or hot in
comparison with circuit lines, pump
should be shut down immediately.
Before restarting, insure that fluid
cooling capacity is adequate to remove
system generated heat.
( 1B) Install oil cooler (air or water type)
( 1C) Install oil temperature shut down
switch
( 1D) Check to be sure CYCON Power Pack
has not been exchanged for Pressure
Shifting Power Pack.
( 2A) Replace with larger hydraulic lines
( 3A) Use lower viscosity oil
( 4A) Check system for bypassing or
leaks
( 1A) Install adequate filter or clean.
( 1B) Replace oil more often and clean
tank
( 2A) Replace oil with factory recommended.
( 3A) Reduce pump pressures to factory
specifications.
( 4A) Tighten all fittings.
( 1A) Disassemble & clean as necessary
( 2A) Change oil to factory recommended
viscosity
( 3A) Check for leaks, tighten fittings
( 4A) Fill reservoir with oil
( 5A) Check primary & secondary sides of
transformer for correct voltage.
( 1A) Check for correct voltage (incoming
power.)
( 1B) Check fuses or breakers at disconnect
( 1C) Check heater elements to be sure
they are tight
( 1D) Check wiring from starter to motor
to make sure all connections are tight
( 1E)Check motor leads to be sure all connec-
tions are tight surges or voltage
NOTE: Excessive overload tripping and/or
motor or coil failures may occur if voltage
surges or voltage drops are frequent in your
area. This circumstance can be remedied by
the installation of phrase protectors which
drop power to the motor if surges are present.
PROBLEM
PUMP MAKES NOISE-SOUNDS LIKE GRAVEL
PUMP SHAFT SEAL LEAKING
EXCESSIVE HEAT
RAPID WEAR
ERRATIC OPERATION
OVERLOADS TRIP FREQUENTLY