Graco 231-081, Instructions And Parts List

24

307–920

GENERAL REPAIR NOTES

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.
4. Disengage the gun safety latch. Hold a metal part

of the gun firmly to the side of a grounded metal

pail, and trigger the gun to relieve pressure.

5.  Engage the gun safety latch.
6.  Open the pressure drain valve, having a con-

tainer ready to catch the drainage. Leave the

pressure 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,  wrap a rag around

the tip guard retaining nut or hose end coupling and

VERY SLOWLY loosen the part to  relieve pressure

gradually, then loosen completely . Now clear the

obstruction.

WARNING

Phillips screwdriver

Small flat blade 

screwdriver

Needle nose pliers

Plastic mallet

Adjustable wrench

2” open–end wrench

Torque wrench

1/4” hex key wrench

3/16” hex key wrench

5/8” socket wrench

3/8” open end wrench

1/2” open end wrench

3/4” open end wrench

7/8” open end wrench

High quality motor oil

Bearing grease 

Mineral spirits

Tool List

1. 

When disconnecting wires

 in the pressure control

assembly, use needle nose pliers to separate mating

connectors.

When reconnecting the  wires

, be sure the flat

blade of the insulated male connector is centered in

the wrap–around blade of the female connector.

CAUTION

To reduce the risk of a pressure control malfunction,

be sure to properly mate connectors, and never pull

on a wire to disconnect it. Pulling on a wire could

loosen the connector from the wire.

2.

Route wires carefully

 in the pressure control as-

sembly, guiding them through the legs of the U–

shaped bourdon tube. This is to avoid interfering with

the bourdon tube, which moves as the pressure set-

ting changes, and to avoid pinching the wires be-

tween the pressure control and cover.

CAUTION

Improper wire routing can result in poor sprayer per-

formance or damage to the pressure control.

3.

Keep all screws, nuts, washers, gaskets, and

electrical fittings

 removed during repair proce-

dures. These parts are not normally provided with re-

placement assemblies.

4. 

Test your repair before regular operation 

of the

sprayer to be sure the problem is corrected.

If the sprayer does not operate properly

, review

the repair procedure again to verify that everything

was done correctly . If necessary , refer to the

Troubleshooting Guide, pages 16–21, to help iden-

tify other possible problems and solutions.

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.

WARNING

CAUTION

Do not run the sprayer dry for more than 30 seconds

to avoid damaging the pump packings.

5. 

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.

During operation, the motor becomes very hot and

could burn your skin if touched. Flammable materi-

als spilled on the hot, bare motor could cause a fire

or explosion. Always have the motor shield in place

during regular operation to reduce the risk of burns,

fire or explosion.

WARNING