General Repair Information - Graco 231-043 Instructions-Parts List Manual

Pressure Relief Procedure
To reduce the risk of serious bodily injury, including fluid in-
jection, splashing fluid or solvent in the eyes or on the skin,
or injury from moving parts or electric shock, always follow
this procedure whenever you shut of f the sprayer , when
checking or servicing any part of the spray system, when in-
stalling, cleaning or changing spray tips, and whenever you
stop spraying.
1. Engage the gun safety latch.
2. Turn the ON/OFF switch to OFF.
3. Unplug the power supply cord.
CAUTION
To reduce the risk of a pressure control malfunction:
Always use needle nose pliers to disconnect a
wire.
Mate wire connectors properly. Be sure the flat
blade of the insulated male connector is
centered in the wrap-around blade of the female
connector.
Route wires carefully through the center of the
U-shaped bourdon tube to avoid
with the movement of the bourdon tube. Also
avoid interference from the circuit board and
between the pressure control and cover.
Tool List
Phillips screwdriver
Small flat blade
screwdriver
Needle nose pliers
Plastic mallet
Adjustable wrench
Adjustable, open-end
wrench
Torque wrench
1. Keep all screws, nuts, washers, gaskets, and
electrical fittings removed during repair proce-
dures. These parts are not normally provided with re-
placement assemblies.
2. Test your repair before regular operation of the
sprayer to be sure the problem is corrected.

GENERAL REPAIR INFORMATION

WARNING
interference
1/4 in. hex key wrench
3/16 in. hex key wrench
5/8 in. socket wrench
3/8 in. open end wrench
1/2 in. open end wrench
3/4 in. open end wrench
7/8 in. open end wrench
High quality motor oil
Bearing grease
4. Disengage the gun safety latch. Hold a metal part of the
gun firmly to the side of a grounded metal pail, and trig-
ger the gun to relieve pressure.
5. Engage the gun safety latch.
6. Open the pressure drain valve, having a container
ready to catch the drainage. Leave the 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 fol -
lowing the steps above, VERY SLOWLY loosen the tip guard
retaining nut or hose coupling to relieve pressure gradually,
then loosen completely. Now clear the tip or hose.
WARNING
To reduce the risk of serious bodily injury, including
electric shock, DO NOT touch any moving parts or
electrical parts with your fingers or a tool while in-
specting the repair.
Shut off the sprayer and unplug it as soon as you
complete the inspection.
Reinstall all covers, gaskets, screws and washers
before operating the sprayer.
3. If the sprayer does not operate properly , review
the repair procedure again to verify that everything
was done correctly
Troubleshooting Guide, pages 16–21, to help iden-
tify other possible problems and solutions.
CAUTION
Do not run the sprayer dry for more than 30 seconds
to avoid damaging the pump packings.
4. Reinstall the motor shield before regular opera-
tion of the sprayer and replace it if it is damaged. The
cover directs cooling air around the motor to help pre-
vent overheating. It can also help reduce the risk of
burns, fire or explosion; see the WARNING, below.
WARNING
During operation, the motor and drive housing be-
come very hot and could burn your skin if touched.
Flammable materials spilled on the hot, bare motor
could cause a fire or explosion. Always have the mo-
tor shield in place during regular operation to reduce
the risk of burns, fire or explosion.
6
. If necessary , see the