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Pressure Relief Procedure
To reduce the risk of serious bodily injury, including
fluid injection, injury from splashing fluid or solvent in
the eyes or on the skin, moving parts or electric
shock, always follow this procedure whenever you
shut off the sprayer, when checking or servicing any
part of the spray system, when installing, cleaning or
changing spray tips, and whenever you stop spray-
ing.
1. Engage the gun safety latch.
2. Turn the ON/OFF switch to OFF.
3. Unplug the power supply cord.
Check everything in the troubleshooting table
before disassembling the sprayer.
TYPE OF PROBLEM
Building circuit breaker opens
Sprayer circuit breaker opens
Sprayer will not run
Poor spray pattern
Troubleshooting
WHAT TO CHECK
If check is OK, go to next check
Check all electrical wiring for damaged
insulation.
Check for other electrical appliances on
circuit.
Check position of 15–20 (Lo-High) amp
switch.
Check for locked motor rotor. Unplug cord
and try to turn fan blades with a screwdriver.
Check for shorted motor. Use ohmmeter to
check for shorts between motor leads or
between motor leads and motor frame.
Check electrical supply with voltmeter. Meter
should read 105–125 VAC.
Check pressure control knob setting. Motor
will not run if it is at minimum setting (fully
counterclockwise).
Check for a clogged spray tip. Refer to
separate gun or tip instruction manual.
Check extension cord for visible damage.
Use a volt meter or test lamp at extension
cord outlet to check.
Check sprayer power supply cord for visible
damage such as broken insulation or wires.
Check electrical supply with volt meter. Meter
should read 105–125 VAC.
Check for motor damage. Remove drive
housing assembly. See page 21. Try to rotate
fan by hand.
Check for worn spray tip.
4. Disengage the gun safety latch. Hold a metal
part of the gun firmly to a grounded metal pail.
Trigger the gun to relieve pressure.
5. Engage the gun safety latch.
6. Open the pressure drain valve. Leave the pres-
sure drain valve open until you are ready to
spray again.
If you suspect that the spray tip 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 cou-
pling to relieve pressure gradually, then loosen com-
pletely. Now clear the tip or hose obstruction.
WHAT TO DO
When check is not OK refer to this column
Replace any damaged wiring.
Shutdown other electrical appliances on
circuit.
Put switch in 15 amp (LO) position.
Repair gear train or pump, if damaged. Thaw
the sprayer, if frozen; See NOTE 1. Replace
the pressure control, if damaged.
Inspect for damage to motor brush leads.
Replace motor, if necessary.
Connect to outlet of correct voltage.
Slowly increase pressure setting to see if
motor starts.
Relieve pressure. Refer to separate gun or
tip instruction manual for tip cleaning.
Replace extension cord.
Replace power supply cord.
Reset building circuit breaker; replace
building fuse. Try another outlet.
Replace motor (1) if fan won't turn.
Relieve pressure and then replace the tip.
See the separate gun or tip manual.
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