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Replacing the PRIME/SPRay valve
Perform the following procedure using PRIME/SPRAY valve
replacement kit P/N 800-915 or 700-258.
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
Valve Housing
Assembly
Groove Pin
Valve
Handle
Replacing the Sprayer ON/OFF Switch
1. Perform the Pressure Relief Procedure.
2. Using a Phillips screwdriver, remove the four screws that
secure the heat sink assembly to the housing. Carefully
remove the heat sink assembly from the housing. Gently
move the assembly away from the sprayer and allow the
assembly to hang from the housing.
3. Locate the bottom of the sprayer ON/OFF switch inside
the housing.
ON/OFF
Switch
Heat Sink
Assembly
Heat Sink
Assembly
Screw
4. Disconnect the switch wires from the sprayer ON/OFF
switch. Remember the locations of each of the two wires
(label the wires, if necessary).
5. Depress the mounting tabs on each corner of the sprayer
ON/OFF switch inside the housing and remove the switch
through the top of the housing.
6. Snap the new sprayer ON/OFF switch into the switch hole
in the housing.
7. Connect the two switch wires to the new sprayer ON/
OFF switch. Make sure the wires are connected to the
corresponding terminals from which they were removed
(refer to the labels created earlier in this procedure or
the electrical schematic in the Parts List section of this
manual).
8. Carefully place the heat sink assembly over the housing
taking care not to pinch any wires.
9. Install the four screws that secure the heat sink assembly
to the housing. Tighten securely.
© Titan Tool Inc. All rights reserved.
Pump
Manifold
Gasket
Valve Stem
Cam Base
Relay
Replacing the Gears and/or Slider
assembly
1. Using a Phillips screwdriver, remove the four front cover
screws. Remove the front cover.
2. Start the engine (refer to the procedures in the Operation
section of this manual). Turn the pressure control knob
clockwise to its maximum pressure setting.
3. Toggle the sprayer ON/OFF switch between the ON and
OFF positions in short bursts until the slider assembly and
piston stop at the bottom of their stroke (in their lowest
position).
4. Turn off the engine and perform the Pressure Relief
Procedure.
NOTE: If replacing the slider assembly, the fluid section
must be removed from the pump housing.
5. Using a 3/8" hex
wrench, remove the
two socket screws that
secure the fluid section
to the pump housing.
6. Pull fluid section
housing down
approximately 1/2"
from the gear box
housing to clear the
transducer.
7. Slide the fluid section
housing and piston rod
forward until the piston
rod is out of the T-slot
on the slider assembly.
8. Using a 1/4" hex
wrench,remove the four socket screws that secure the
pump housing to the gear housing.
Thrust Washer
Output Gear Assembly
Thrust Washer
Housing Gasket
Pump Housing
Slider Assembly
Pump Housing Socket Screw
9. Slide the pump housing away from the gear housing.
10. Remove and clean the housing gasket. Replace if damaged.
11. Slide the crankshaft assembly, with the two thrust washers
out from the gear housing side of the pump housing.
12. Remove the output gear assembly with the two thrust
washers.
13. Thoroughly clean the crankshaft assembly, the output
gear assembly, and all the thrust washers.
14. Inspect all parts for excessive wear and replace if
damaged or worn. If the crankshaft or output gear
assembly are replaced, replace the corresponding thrust
washers as well.
15. Inspect the pinion gear on the end of the drive shaft for
wear. Replace if damaged or worn (refer to the "Servicing
the Clutch Assembly" procedure in this section).
9
Pump
Housing
Slider
Assembly
Piston
Front
Cover
Fluid
Screw
Section
Front
Housing
Cover
Socket
Screw
Gear Housing
Cylindrical
Thrust Washer
Crankshaft
Assembly
Thrust
Washer
Slider Bushing
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