Greenlee Textron / Subsidiary of Textron Inc.
6
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
1721-m4 Spec. Hydraulic Power Pump
Minor Hydraulic Trouble Chart
The hydraulic unit should be observed constantly for
out-of-the-ordinary performance and unusual noises.
If any of these are present, shut off pump and take
corrective steps immediately to avoid possible expensive
repairs later on. In most cases, a minor repair will solve
the problem but it is suggested that, if trouble continues,
POSSIBLE REMEDY
PROBLEM
PROBABLE CAUSE
Pump motor will not start.
Power cord not sufficiently connected.
Check for tight connections.
Power cord cut.
Replace.
Defective motor or switch.
Replace or repair.
Fuse in wall box blown.
Replace fuse.
Will not pump oil.
Not primed.
Run pump for a few minutes, tipping
unit from side to side.
Sticking plunger.
Replace #8 & 9.
Plugged-up screens.
Clean or replace #24.
Defective control valve.
Repair or replace.
Sticking vanes.
Repair or replace #16 & 17.
Excessive noise in hydraulic
Low in oil.
Add oil.
system.
Air in system.
Run pump to work out air.
Loose drive shaft adapter.
Tighten set screw #70.
Defective motor.
Replace.
Necessary to add oil often.
Oil leaks.
Check for broken lines, loose fittings,
or connections.
the unit should be returned to the factory or to a qualified
service center for the proper repair. Under no conditions
allow unqualified personnel to attempt to repair the pump,
particularly the pump block unit, as serious, irreparable
damage may result.
If the above corrective measures fail to make the pump function, it is recommended that you send the pump back to
the factory or to a qualified service center.
