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12
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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.
13. Lubricate the inside diameter of the slider housing and the
outside diameter of the slider assembly with oil. Fill the slider
cup with Lubriplate 3000W grease (the slider cup is the area
on the slider assembly where the connecting rod and slider
housing join and pivot).
14. Insert the slider assembly into the bushing end of the slider
housing.
Crankshaft
Dowel Pin
Connecting Rod
Slider Housing
Socket Screw
Pump
Housing
Slider Housing
Slider Assembly
15. Hold the assembly up to the pump housing, lining up the
connecting rod with the crankshaft pin and the pump housing
dowel pins with their mating holes on the slider housing.
Slide the assembly onto the crankshaft pin and pump housing
dowel pins until the slider housing bottoms out on the pump
housing. Make sure the grease fitting on the connecting rod
is facing the open side of the pump housing.
16. Install the the four socket screws and lock washers that secure
the slider housing to the pump housing. Tighten in a diagonal
pattern and torque to 400–440 in.-lbs.
17. Lubricate the connecting rod bearing with Lubriplate 1242
grease by inserting the end of a grease gun onto the grease
fitting on the end of the crankshaft pin. Lubricate the main
housing bearing by inserting the end of a grease gun onto the
grease fitting in the center of the crankshaft. Also, lubricate
the connecting rod bushing by inserting the end of a grease
gun onto the grease fitting on the connecting rod.
18. Position the front cover over the pump housing. Secure the
front cover using the four front cover screws.
19. Apply blue Loctite to the bottom 3–4 threads on the fluid
section cylinder.
20. Turn the fluid section jam nut clockwise until it is flush against
the top of the cylinder.
21. Lubricate the first several threads at the top of the cylinder
with anti-seize compound.
22. Thread the cylinder into the pump housing, turning
clockwise. When the connecting pin hole on the piston
rod lines up with the hole in the slider assembly, insert the
connecting pin.
23. Slide the retaining ring down on the slider assembly to cover
the connecting pin.
24. Continue to turn the cylinder clockwise until the jam nut is
flush against the slider housing.
NOTE: If the nipple on the cylinder does not face the back
of the unit, turn the cylinder counterclockwise until
the nipple faces the back of the unit. Do not turn
the cylinder more than one full turn.
25. Once the nipple is positioned, turn the jam nut clockwise until
it contacts the pump housing.
26. Tighten the jam nut with a wrench to tighten it against the
slider housing.
27. Using a 7/8” open-end wrench, attach the fluid hose to the
fitting on the back of the fluid section. Tighten securely.
Replacing the Gears
1. Perform the Pressure Relief Procedure.
2. Using a Phillips screwdriver, remove the four front cover
screws. Remove the front cover.
3. Using a 7/8” open-end wrench, loosen and remove the fluid
hose from the fitting on the back of the fluid section.
4. Locate the four socket screws that secure the pump housing
to the gear housing. Two are at the inside top of the pump
housing and two are located on the external bosses at the
bottom of the pump housing.
5. Using a 1/4” hex wrench, remove the four socket screws that
secure the pump housing to the gear housing.
6. Slide the pump housing assembly away from the gear
housing.
7. Remove and clean the housing gasket. Replace if damaged.
8. Remove the gear assembly and the 1/4” thrust balls from
within the bearing bores that support the gear.
Housing Gasket
Gear Housing
Thrust Ball
Thin Thrust Washer
Thrust Ball
Front
Cover
Pump Housing
Gear
Assembly
Thick Thrust
Washer
Pump Housing
Socket Screw
Front Cover
Screw
9. Inspect the gears for excessive wear and replace if damaged
or worn. If the gear assembly is replaced, replace the two
thrust balls as well.
10. 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).
11. Inspect the output gear and the two thrust washers on the
end of the crankshaft in the pump housing for wear. This gear
is permanently attached to the crankshaft and pump housing.
If this gear is worn, the pump housing must be replaced.
NOTE: If replacing the pump housing , first remove the fluid
section, slider housing, and slider assembly from the
pump housing (refer to the “Replacing the Slider and
Slider Housing” procedure in this section).
