Maintenance
WARNING
Before proceeding, follow the Pressure Relief Procedure
outlined previously in this manual. Additionally, follow all
other warnings to reduce the risk of an injection injury,
injury from moving parts or electric shock. Always
unplug the sprayer before servicing!
General Repair and Service Notes
The following tools are needed when repairing this sprayer:
Phillips Screwdriver
Needle Nose Pliers
Adjustable Wrench
Rubber Mallet
Flat-blade Screwdriver
1. Before repairing any part of the sprayer, read the
instructions carefully, including all warnings.
CAUTION
Never pull on a wire to disconnect it. Pulling on a wire
could loosen the connector from the wire.
2. Test your repair before regular operation of the sprayer to
be sure that the problem is corrected. If the sprayer does
not operate properly, review the repair procedure to
determine if everything was done correctly. Refer to the
Troubleshooting Charts to help identify other possible
problems.
3. Make certain that the service area is well ventilated in
case solvents are used during cleaning. Always wear
protective eyewear while servicing. Additional protective
equipment may be required depending on the type of
cleaning solvent. Always contact the supplier of solvents
for recommendations.
6. At the electronic control assembly:
a. Disconnect the white wire coming from the power cord
and the white wire coming from the relay.
b. Disconnect the three wires coming from the
potentiometer.
c. Disconnect the seven wires coming from the indicator
lights assembly.
7. Loosen and remove the three motor mounting screws.
8. Pull the motor out of the gearbox housing.
9. With the motor removed, inspect the gears in the gearbox
housing for damage or excessive wear. Replace the
gears, if necessary.
10. Install the new motor into the gearbox housing. Make
sure the housing gasket is positioned properly.
11. Secure the motor with the three motor mounting screws.
12. Reconnect the wires to the electronic control assembly
(refer to the electrical schematic in the Parts List section
of this manual).
13. Position the electronic cover over the electronic control
assembly. Secure the electronic cover with the three
electronic cover screws.
NOTE: Use only electronic cover screws to secure
the electronic cover (see Drive Assembly parts
list). Use of any other screws may damage the
electronic control assembly.
14. Slip the baffle assembly up and around the motor. Secure
the baffle assembly with the tie wrap.
15. Slide the motor shroud over the motor. Make sure the
shroud gasket is positioned properly.
16. Secure the motor shroud with the four motor shroud
screws.
Motor Shroud Screws
Motor Shroud
Electronic Cover
Electronic Cover
Screw
Gearbox
Housing
Motor Mounting
Screw
Electronic Control
Assembly
Motor
Baffle Assembly
Replacing the Motor Assembly
(with Electronic Control)
1. Perform the Pressure Relief Procedure, and unplug the unit.
2. Turn the pressure control knob to the CLEAN position in
the red zone to discharge any stored electricity.
3. Loosen and remove the four motor shroud screws.
Remove the motor shroud.
4. Release the tie wrap on the top of the baffle assembly
and slip the baffle assembly down off of the motor.
5. Loosen and remove the three electronic cover screws.
Lift the electronic cover off of the electronic control
assembly on the motor.
Housing Gasket
Shroud Gasket
Replacing the Gears
1. Perform the Pressure Relief Procedure, and unplug the unit.
2. Turn the pressure control knob to the CLEAN position in
the red zone to discharge any stored electricity.
3. Loosen and remove the four motor shroud screws.
Remove the motor shroud.
4. Release the tie wrap on the top of the baffle assembly and
slip the baffle assembly down off of the motor.
5. Loosen and remove the three electronic cover screws.
Lift the electronic cover off of the electronic control
assembly on the motor.
6. At the electronic control assembly:
a. Disconnect the white wire coming from the power cord
and the white wire coming from the relay.
b. Disconnect the three wires coming from the
potentiometer.
c. Disconnect the seven wires coming from the indicator
lights assembly.
DP-airless Page 8 of 18
