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Troubleshooting
3A0538F 15
Troubleshooting
Problem Cause Solution
Pump output low on both strokes. Restricted air supply lines. Clear any obstructions; be sure all shutoff
valves are open; increase pressure, but
do not exceed maximum working pres-
sure.
Exhausted fluid supply. Refill and reprime pump.
Clogged fluid outlet line, valves, etc. Clear.
Worn piston packing. Replace. See lower manual.
Pump output low on only one stroke. Held open or worn ball check valves. Check and repair.
Worn piston packings. Replace. See lower manual.
No output. Improperly installed ball check valves. Check and repair.
Pump operates erratically. Exhausted fluid supply. Refill and reprime pump.
Held open or worn ball check valves. Check and repair.
Worn piston packing. Replace. See lower manual.
Pump will not operate. Restricted air supply lines. Clear any obstructions; be sure all shut
off valves are open; increase pressure,
but do not exceed maximum working
pressure.
Exhausted fluid supply. Refill and reprime pump.
Clogged fluid outlet line, valves, etc. Clear.
Damaged air motor. See air motor manual.
Fluid dried on piston rod. Disassemble and clean pump. See lower
manual. In future, stop pump at bottom of
stroke.