A SERVICE OF

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Troubleshooting
306518ZAC 7
Troubleshooting
1. Follow Pressure Relief Procedure, page 6, before
checking or repairing gun.
2. Check all possible problems and causes before dis-
assembling gun.
Problem Cause Solution
Pump fails to operate
Inadequate air supply pressure or
restricted air lines
Increase air supply and/or clear
restriction
Closed or clogged valves Open and/or clear
Clogged fluid lines, hoses, valves,
etc.
Relieve pressure. Clear obstruction
Damaged air motor
Assess damage and service air
motor
Exhausted fluid supply Refill and reprime or flush
Continuous air exhaust
Worn or damaged air motor gasket
or seal
Asses wear or damage and service
air motor
Erratic pump operation
Exhausted fluid supply Refill and reprime or flush
Held open or worn intake valve or
piston packings
Clear and service
Pump operates, but output low on
upstroke
Held open or worn piston packings Clear and service
Pump operates, but output low on
downstroke
Held open or worn intake valve Clear and service
Pump operates, but output low on
both strokes
Inadequate air supply or restricted
air line
Increase air supply and /or clear
restriction
Closed or clogged valves Open and/or clear
Exhausted fluid supply
Refill fluid supply and reprime pump
or flush
Clogged fluid lines, hoses, valves,
etc.
Relieve pressure. Clear obstruction