Troubleshooting Hydraulic Pump - Greenlee WW 980 Manuel D'instructions

Troubleshooting—Hydraulic Pump
Repair work must be done by qualified personnel
familiar with this equipment.
If possible, use a hand pump to apply back pressure
when checking for leaks.
Motor will not start.
Motor will not start
under load.
Motor starts, but stops
when it encounters a
load.
Greenlee Tools, Inc.
No power to motor.
Motor is damaged or worn out.
Voltage supplied to motor is
too low.
Current rating of extension cord is
too low.
Pilot-operated valve will not open,
will not open fully, or opens too
slowly.
Voltage supplied to motor is too
low.
Current rating of extension cord is
too low.
Motor is overheated.
Misalignment of the motor shaft
and low pressure pump drive shaft.
The counterweight needs
adjustment.
Motor is damaged or worn out.
980 Hydraulic Power Pump
How to use this table: If your hydraulic pump does not
operate properly, find the description of the problem
under the "Problem" column. Read the Probable Cause
and the Possible Remedy. Begin with solution listed
first, and proceed through all of the solutions until the
problem is solved. Where repairs are necessary, see the
appropriate schematic and item listed in the "Possible
Remedy" column.
Plug electric cord in to a properly rated power
source. Unplug cord and inspect the contacts.
Clean contacts if necessary.
Replace low voltage control. The voltage should
be 120 VAC (+/–10%).
Replace the electric cord.
Replace switch cord or ON/OFF switch.
Replace motor.
Unplug cord and check power source with
a voltmeter. The voltage should be 120 VAC
(+/– 10%).
See the extension cord specifications under
Electrical Connection in the Setup section of
this manual.
See "Troubleshooting—Pilot-Operated Valve" at
the end of this Troubleshooting section.
Unplug cord and check power source with
a voltmeter. The voltage should be 120 VAC
(+/– 10%).
See the extension cord specifications under
Electrical Connection in the Setup section of this
manual.
Let motor cool. Do not run motor continuously in a
hot environment.
Replace reservoir cover plate (22).
See Motor Face Seal, Figure A1, for the correct
setting of the counterweight.
Replace motor.
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