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replacing the motor
1. Perform the Pressure Relief Procedure and unplug the sprayer.
2. Loosen and remove the two motor cover screws. Remove the
motor cover.
3. Loosen and remove the three belly pan screws. Remove the
belly pan.
4. On the back of the motor, disconnect the wire coming from
the potentiometer and the wire coming from the transducer.
Also, disconnect the two wires coming from the control panel
board (refer to the electrical schematic in the Parts List section
of this manual).
5. Remove the four control panel mounting screws. Pull back
the control panel for access to the control panel board.
6. At the the control panel board, disconnect the two wires
coming from the motor (refer to the electrical schematic in the
Parts List section of this manual).
7. Loosen and remove the four motor mounting screws.
8. Pull the motor out of the pump housing.
NOTE: If the motor will not dislodge from the pump
housing:
• Remove the front cover plate.
• Using a rubber mallet, carefully tap on the front
of the motor crankshaft that extends through the
slider assembly.
9. With the motor removed, inspect the gears in the pump
housing for damage or excessive wear. Replace the gears, if
necessary.
10. Install the new motor into the pump housing.
11. Secure the motor with the four motor mounting screws.
12. Reconnect the wires (refer to the electrical schematic in the
Parts List section of this manual).
13. Position the control panel on the pump housing and secure in
position using the four control panel mounting screws.
14. Replace the belly pan. Secure with the three belly pan screws.
15. Slide the motor cover over the motor. Secure the motor cover
with the two motor cover screws.
Motor cover
Control panel
mounting screw
Control panel
Front cover
Front cover screw
replacing the Gears
10. Remove and inspect the 2nd stage gear for damage or
11. Remove and inspect the gear and crank assembly for damage
12. Reassemble the pump by reversing the above steps. During
Motor
Motor
mounting
screw
Motor
cover
screw
Belly pan
Belly pan
screw
9
1. Perform the Pressure Relief Procedure and unplug the sprayer.
2. Loosen and remove the two motor cover screws. Remove the
motor cover.
3. Loosen and remove the three belly pan screws. Remove the
belly pan.
4. On the back of the motor, disconnect the wire coming from
the potentiometer and the wire coming from the transducer.
Also, disconnect the two wires coming from the control panel
board (refer to the electrical schematic in the Parts List section
of this manual).
5. Remove the four control panel mounting screws. Pull back
the control panel for access to the control panel board.
6. At the the control panel board, disconnect the two wires
coming from the motor (refer to the electrical schematic in the
Parts List section of this manual).
7. Loosen and remove the four motor mounting screws.
8. Pull the motor out of the pump housing.
NOTE: If the motor will not dislodge from the pump
housing:
• Remove the front cover plate.
• Using a rubber mallet, carefully tap on the front
of the motor crankshaft that extends through the
slider assembly.
9. Inspect the armature gear on the end of the motor for
damage or excessive wear. If this gear is completely worn out,
replace the entire motor.
excessive wear. Replace if necessary.
or excessive wear. Replace if necessary.
reassembly, make sure the thrust washer is in place.
NOTE: refill the gear box in the pump housing with five
ounces of Lubriplate (P/N L045-479 ).
Motor cover
Control panel
mounting screw
Control panel
Front cover
Front cover screw
Motor
mounting
screw
Motor
2nd stage
gear
Gear and
crankshaft
Thrust
washer
Motor
cover
screw
Belly pan
Belly pan
screw
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