2 MAINTENANCE
TROUBLE-SHOOTING CHART
PROBLEM
EXCESSIVE HEAT
RAPID WEAR
ERRATIC OPERATION
UNIT DOES NOT SHUT DOWN AT
END OF CYCLE
OVERLOADS TRIP FREQUENTLY
GUIDE SHOES WEARING EXCES-
SIVELY ONLY ON ONE SIDE
CAUSE
( 1) Continuous running
( 2) 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
( 1) Valve sticking or binding
( 2) Viscosity of oil too high
( 3) Air in system
( 4) Low oil
( 5) Low voltage
( 1) Magnetic interlock malfunction
( 1) Material being loaded unevenly to
one side
SOLUTION
( 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
( 2A) 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
viscosity
( 3A) Reduce pump pressures to factory
specifications.
( 4A) Tighten all suction fittings.
( 1A) Disassemble & clean as necessary
( 2A) Replace oil with 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 interlock per PROCEDURES
( 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 con-
nections are tight
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 phase protectors which
drop power to the motor if surges are pre-
sent.
( 1A) Distribute material evenly when load-
ing the machine
( 1B) Shim the cylinder up on the opposite
side from the wear
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