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Troubleshooting
Pressure Relief Procedure
WARNING
INJECTION HAZARD
To reduce the risk of serious injury, in-
cluding fluid injection, splashing in the
eyes or on the skin, or moving parts,
always follow the Pressure Relief Procedure
whenever you
D are instructed to relieve the pressure
D shut off the pump
D stop spraying/dispensing
D check or service any of the system equipment
D install or clean the spray tips/nozzles
1. Lock the gun/valve trigger safety.
2. Turn off the air to the motor.
3. Close the bleed-type master air valve (required in
your system).
4. Unlock the gun/valve trigger safety. Hold a metal
part of the gun/valve firmly to a grounded metal
pail. Trigger the gun/valve to relieve pressure.
5. Lock the gun/valve trigger safety.
6. Open the fluid drain valve. Leave the fluid drain
valve open until you are ready to spray/dispense
again.
If you suspect that the spray tip/nozzle or hose is
completely clogged, or that pressure has not been fully
relieved after following the steps above, very slowly
loosen the tip guard retaining nut or hose end coupling
to relieve pressure gradually, then loosen completely.
Now clear the tip/nozzle or hose obstruction.
Stalled Motor
To restart a stalled motor, close the bleed-type master
air valve to bleed off all trapped air pressure. Turn the
air back on. This will trip the air valve of the air motor,
causing the piston to go to the top or bottom of its
stroke.
WARNING
MOVING PARTS HAZARD
The piston in the air motor moves when
air is supplied to the motor. Moving parts
can pinch or amputate your fingers or
other body parts. Relieve the pressure before
servicing the motor.
If Motor Will Not Operate
Check the following areas for damage or wear and
replace parts as needed.
Air valving mechanism: director valve (3), spring (4),
air valve housing (5), valve plate (2), valve plate seal
(1).
Trip rod: check for broken spring or bent rod (40). Do
not attempt to repair the trip rod.
Damaged toggle mechanism: guide (16), spring (17),
housing (18), pin (19).