Replacing the Slider Assembly and
Slider Housing
1. 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.
2. Toggle the sprayer ON/OFF switch between the ON and
OFF positions in short bursts until the slider assembly
stops in a position where the fluid section connecting pin
and retaining ring are visible through the slot in the slider
housing.
3. Turn off the engine and perform the Pressure Relief
Procedure.
4. Using a Phillips
screwdriver,
remove the four
front cover
screws. Remove
the front cover.
5. Slide the retaining
ring up on the
slider assembly to
expose the
connecting pin.
6. Push the
connecting pin
forward through
the slider
assembly and
piston. The
connecting pin
will fall out from
the rear window of the slider housing where it can be
retrieved.
7. Using a 7/8” open-end wrench, loosen and remove the
fluid hose from the fitting on the back of the fluid section.
8. Using a 21/4” wrench, loosen the fluid section jam nut.
Turn the fluid section counterclockwise by until it
disengages from the slider housing.
9. Using a 5/16” hex wrench, remove the four socket screws
and lock washers that secure the slider housing to the
pump housing.
10. Remove the slider housing and slider assembly by pulling it
straight out from the pump housing. The slider housing
assembly will disengage from the pump housing dowel pins
and the connecting rod will disengage from the crankshaft.
11. Remove the slider assembly from the slider housing by
grasping the bearing end of the connecting rod and lifting
it straight out from the slider housing.
12. Check the parts for wear.
a. If the slider housing bushing is scored or out of round it
should be replaced.
b. If the slider assembly is scored or the connection
between the connecting rod and slider assembly
exhibits movement other than pivoting movement, the
slider assembly should be replaced. The slider
assembly also should be replaced if the connecting rod
bearing shows signs of wear.
c. Any parts that will be reused should be cleaned
thoroughly, including the connecting rod. Also, clean the
crankshaft pin that the connecting rod bearing rides on.
d. If a new slider assembly will be used, remove the
retaining ring from the bottom of the old slider assembly
and slide it onto the new assembly so that it rests
above the connecting pin hole.
