General Repair Information - Graco 231–034 Instructions And Parts List

General Repair Information

WARNING
To reduce the risk of a serious injury, follow the
Pressure Relief Procedure on page 4 whenever
you are instructed to relieve the pressure.
CAUTION
To reduce the risk of a pressure control malfunc-
tion, follow these precautions.
Use needle–nose pliers to disconnect the wires.
Be sure the flat blade of the insulated male con-
nector is centered in the wrap-around blade of
the female connector.
Route the electrical wires carefully through the
center of the U-shaped bourdon tube. Avoid
interference from the circuit board and between
the pressure control and cover.
WARNING
To reduce the risk of a serious injury, including
electric shock or a burn, follow these precautions
when repairing the sprayer.
Do not touch any moving parts or electrical
parts with your fingers or a tool while inspecting
the repair.
Shut off the sprayer and unplug the sprayer as
soon as you complete the inspection.
Reinstall all of the covers, gaskets, screws, and
washers before operating the sprayer.
Do not touch the motor or the drive housing dur-
ing operation. These parts may be very hot.
A fire or an explosion could result if flammable
fluids are spilled on a hot, bare motor.
Always have the motor shield in place during
regular operation.
These tools are needed for the repairs.
Phillips screwdriver
Small, flat–blade screwdriver
Needle–nose pliers
Plastic mallet
Adjustable wrench
Adjustable, open-end wrench
Torque wrench
1/4 inch hex–key wrench
3/16 inch hex–key wrench
5/8 inch socket wrench
3/8 inch open–end wrench
1/2 inch open–end wrench
3/4 inch open–end wrench
7/8 inch open–end wrench
High–quality motor oil
Bearing grease
1. Keep all the screws, nuts, washers, gaskets, and
electrical fittings that are removed during the repair
procedures. These parts are not normally provided
with the replacement assemblies.
2. Clean and inspect all parts. Replace worn or dam-
aged parts. If you are using a repair kit, use all of
the new parts in the kits even if the old parts still
look good.
3. Test the repair before the regular operation of the
sprayer to be sure the problem is corrected.
4. Replace the motor shield if it is damaged. The
shield directs air around the motor to help prevent
overheating.
5. If the sprayer does not operate properly, review the
repair procedure again to verify that everything
was done correctly. If necessary, refer to the trou-
bleshooting section, pages 16–21, to help identify
other possible problems and solutions.
CAUTION
Do not operate the sprayer without fluid in it for
more than 30 seconds, to avoid damaging the
pump packings.