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Troubleshooting
Troubleshooting
PROBLEM
Pump output low on both strokes.
Pump output low on only one stroke.
Pump operates erratically.
Pump will not operate.
Pump will not prime
Excessive throat leakage.
Pump will not stall when fluid is shut off.
14
1. Relieve the pressure.
2. Check all possible problems and solutions before
CAUSE
Restricted air or 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.
Exhausted fluid supply.
Held open or worn ball check valves.
Worn piston packing.
Excessive hydraulic fluid supply pressure
to Viscount motor.
Restricted air or hydraulic supply lines.
Exhausted fluid supply.
Clogged fluid outlet line, valves, etc.
Damaged air motor or hydraulic motor.
Fluid dried on piston rod.
Suction line clogged.
Held open or worn ball check valves.
Piston assembled with wrong nut.
Worn piston rod or throat packings.
Warn ball check valves.
Worn piston packing.
disassembling pump.
Clear any obstructions; be sure all shutoff
valve are open; increase pressure, but do
not exceed maximum working pressure.
Refill and reprime pump.
Clear.
Replace. See lower manual 311690.
Check and repair.
Replace. See lower manual 311690.
Refill and reprime pump.
Check and repair.
Replace. See lower manual 311690.
See Viscount I Plus motor manual
308330 or Viscount II manual 308048.
Clear any obstructions; be sure all shut
off valves are open; increase pressure,
but do not exceed maximum working
pressure.
Refill and reprime pump.
Clear.
See air motor manual 311238 or hydrau-
lic motor manual 308330 or 308048.
Disassemble and clean pump. See lower
manual 311690. In future, stop pump at
bottom of stroke.
Clear. Flush more frequently.
Check and repair.
Use only the large, round, special nut.
Replace. See lower manual 311690.
Check and repair.
Replace. See lower manual 311690.
SOLUTION
311211L
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