![background image](http://html1.mh-extra.com/html/graco/viscount-ii/viscount-ii_instructions-parts-list-manual_2251369014.webp)
Troubleshooting
14
3A0537G
Troubleshooting
Problem
Cause
Solution
Pump output low on both strokes.
Restricted hydraulic 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.
Excessive hydraulic fluid supply pres-
sure to motor.
See motor manual.
Pump will not operate.
Restricted hydraulic 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 hydraulic motor.
See motor manual.
Fluid dried on piston rod.
Disassemble and clean pump. See lower
manual. In future, stop pump at bottom of
stroke.