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Replacing the PRIME/SPRay valve
Perform the following procedure using PRIME/SPRAY valve
replacement kit P/N 0507690.
1. Drive the groove pin out of the valve handle.
2. Remove the valve handle and the cam base.
3. Using a wrench, loosen and remove the valve housing
assembly from the pump manifold.
4. Make sure the gasket is in place and thread the new
valve housing assembly into the pump manifold. Tighten
securely with a wrench.
5. Place the cam base over the valve housing assembly.
Lubricate the cam base with grease and line up the cam
with the pump manifold using the dowel pin.
6. Line up the hole on the valve stem with the hole in the
valve handle.
7. Insert the groove pin into the valve handle and through the
valve stem to secure the valve handle in position.
Dowel Pin
Groove Pin
Valve Stem
Gasket
Pump
Manifold
Valve Housing
Assembly
Valve
Handle
Cam Base
Replacing the Filters
Pump Filter
1. Loosen and remove the filter housing.
2. Pull the filter from the pump manifold.
NOTE: If the filter breaks off in the pump manifold, use a
small wood screw to remove.
3. Inspect the filter seal. Based on inspection, clean or
replace the seal.
4. Push the new or cleaned filter into the pump manifold.
5. Slide the filter housing over the filter and thread it into the
pump manifold until secure.
Filter Housing
Filter
Filter Seal
Pump Manifold
Gun Filter
1. Pull down on the bottom of the trigger guard and swing it
away from the handle.
2. Slide off the handle and unscrew the handle tube from the
gun head.
3. Turning clockwise, unscrew the filter from the gun body.
NOTE: Left-handed threads require turning the filter
clockwise to remove.
4. Screw the new or cleaned filter counterclockwise into the
gun head.
5. Slide the handle tube over the filter and screw it into the
gun head.
6. Slide the handle over the handle tube and reattach it to
the gun head.
7. Secure the trigger guard back in position on the bottom of
the handle.
NOTE: For more detail, part number information, and
complete assembly drawings, please see the
LX-80 Platinum Gun Owner’s Manual (P/N 313-
2302).
Replacing the Motor assembly
1. Perform the Pressure Relief Procedure and unplug the
sprayer.
2. Remove the four motor cover screws. Remove the motor
cover.
3. Remove the four heat sink assembly screws. Pull the heat
sink assembly away from the gear box housing.
4. Disconnect the five wires from the relay that is mounted
on the inside of the heat sink assembly.
5. Remove the three relay mounting screws from the heat
sink assembly. Remove the relay.
6. Using the three relay mounting screws, install the new relay
onto the heat sink assembly. Tighten the screws securely.
7. Connect the five wires to the new relay (refer to the
electrical schematic in the Parts List section of this manual).
8. Using the four heat sink assembly screws, install the heat
sink assembly onto the gear box housing. Tighten the
screws securely.
9. Disconnect the black and red wires coming from the gear
box housing. Disconnect the black and red wires from the
capacitors. Disconnect the black and red wires from the
motor.
10. Loosen and remove the four motor mounting screws.
11. Pull the motor out of the gear box 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.
12. With the motor removed, inspect the gears in the gear
box housing for damage or excessive wear. Replace the
gears, if necessary.
13. Install the new motor into the gear box housing.
NOTE: Rotate the motor fan manually until the armature
gear engages with the mating gear in the gear
box housing.
14. Secure the motor with the four motor mounting screws.
15. Push the new capacitors into their clip on the new motor.
