Greenlee / A Textron Company 10 4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
980 Hydraulic Power Pump
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.
PROBLEM PROBABLE CAUSE POSSIBLE REMEDY
Motor will not start. No power to motor. 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.
Motor is damaged or worn out. Replace motor.
Motor will not start under load. Voltage supplied to motor is too low. Unplug cord and check power source
with a voltmeter. The voltage should
be 120 VAC (+/– 10%).
Current rating of extension cord is too See the extension cord specifications
low. under Electrical Connection in the
Setup section of this manual.
Pilot-operated valve will not open, will See “Troubleshooting—Pilot-Operated
not open fully, or opens too slowly.
Valve” at the end of this Troubleshooting
section.
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.
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