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Troubleshooting
Problem
Pump output low on both strokes.
Pump output low on only one stroke.
No output.
Pump operates erratically.
Pump will not operate.
3A3381E
Cause
Restricted hydraulic supply lines.
Exhausted fluid supply.
Clogged fluid outlet line, valves, etc.
Worn piston packing.
Held open or worn ball check valves.
Worn piston packings.
Improperly installed ball check valves.
Exhausted fluid supply.
Held open or worn ball check valves.
Worn piston packing.
Excessive hydraulic fluid supply pressure
to motor.
Restricted hydraulic supply lines.
Exhausted fluid supply.
Clogged fluid outlet line, valves, etc.
Damaged hydraulic motor.
Fluid dried on piston rod.
Troubleshooting
Solution
Clear any obstructions; be sure all shutoff
valves are open; increase pressure, but
do not exceed maximum working pres-
sure.
Refill and re-prime pump.
Clear.
Replace. See lower manual.
Check and repair.
Replace. See lower manual.
Check and repair.
Refill and re-prime pump.
Check and repair.
Replace. See lower manual.
See motor manual.
Clear any obstructions; be sure all shut
off valves are open; increase pressure,
but do not exceed maximum working
pressure.
Refill and re-prime pump.
Clear.
See motor manual.
Disassemble and clean pump. See lower
manual. In future, stop pump at bottom of
stroke.
13
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