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WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 10.
Problem
Pump fails to operate.
Pump operates but output is low on
both strokes.
Pump operates but output is low on
downstroke.
Pump operates but output is low on
upstroke.
Erratic or accelerated operation.
* To determine if the fluid hose or gun is obstructed, follow the Pressure Relief Procedure on page 10. Discon-
nect the fluid hose and place a container at the pump fluid outlet to catch any fluid. Turn on the power just
enough to start the pump. If the pump starts when the power is turned on, the obstruction is in the fluid hose or
gun.
Troubleshooting
1. Relieve the pressure.
2. Check all possible problems and solutions before
Cause
Restricted line or inadequate air or
hydraulic supply.
Insufficient air or hydraulic pressure
-- closed or clogged valves, etc.
Exhausted fluid supply.
Clogged fluid line, gun, etc.
Dirty or damaged motor.
Dried fluid seizure of displacement
rod.
Restricted line or inadequate air or
hydraulic supply.
Insufficient air or hydraulic pressure
-- closed or clogged valves, etc.
Exhausted fluid supply.
Clogged fluid line, gun, etc.
Packing nut too tight.
Loose packing nut or worn throat
packings.
Held open or worn intake valve.
Held open or worn fluid piston valve
or packings.
Exhausted fluid supply.
Piston and intake valves need ad-
justment.
Held open or worn intake valve.
Held open or worn fluid piston valve
or packings.
disassembling the pump.
Clear; increase air or hydraulic sup-
ply.
Open, clean
Refill; reprime or flush.
Clear.*
Service motor (see motor manual,
supplied).
Service (see displacement pump
manual, supplied).
Clear; increase air or hydraulic sup-
ply.
Open, clean
Refill; reprime or flush.
Clear.*
Loosen.
Tighten packing nut (see page 10);
replace throat packings.
Clear; service (see displacement
pump manual, supplied).
Clear; service (see displacement
pump manual, supplied).
Refill; reprime or flush.
Adjust (see displacement pump
manual, supplied).
Clear; service (see displacement
pump manual, supplied).
Clear; service (see displacement
pump manual, supplied).
Solution
307547
15
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