Replacing The Gears And/Or Slider Assembly - Titan ADVANTAGE GPX 85 Owner's Manual

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).
English
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
NOTE: If any of the gears are worn and require
replacement, check the grease in the gear
housing for metal particles or shavings. Remove
the contaminated grease. Replace the grease
that has been removed with fresh Lubriplate GR-
132 grease.
16. Slide the slider assembly up and out of the slider bushing
in the front of the pump housing.
17. Check the parts for wear.
a. If the slider bushing is scored or out of round the
pump housing 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.
18. Coat the output gear assembly and each side of its thrust
washers with fresh Lubriplate GR-132 grease. Place the
thrust washers on their proper shaft of the output gear
assembly.
19. Lubricate the output gear assembly with fresh Lubriplate
GR-132 grease. Insert the gear assembly into its bore in
the gear housing, gear end first. The teeth on the gear will
mate with the teeth on the drive shaft pinion.
20. Generously coat all surfaces of the cylindrical crankshaft
assembly thrust washer with fresh Lubriplate GR-132
grease.
21. Slip the flat end of the cylindrical thrust washer behind the
gear on the output gear assembly, lining its bore up with
the gear housing bearing bore for the crankshaft assembly.
22. Lubricate the crankshaft assembly gear with fresh
Lubriplate GR-132 grease. Slide the gear side shaft of the
crankshaft through the cylindrical thrust washer and into
its bore within the gear housing.
23. Position the pin on the end of the crankshaft towards
the bottom of the gear housing (the bottom dead center
position).
24. Lubricate both faces of the large crankshaft assembly
thrust washer with fresh Lubriplate GR-132 grease. Place
the thrust washer onto the crankshaft against the gear.
25. Place the housing gasket over the gear housing dowel
pins.
26. Lubricate the outside of the slider assembly and the
inside of the slider bushing with oil. Fill the slider cup with
Lubriplate 1242 grease (the slider cup is the area on the
slider assembly where the connecting rod and slider join
and pivot).
27. Insert the slider assembly into the slider bushing.
28. Carefully place the pump housing assembly in front of the
gear housing assembly, lining up the gear housing dowel
pins with their corresponding holes in the pump housing.
Slide the pump housing onto the gear housing until there
is no gap between the housings and gasket.
NOTE: While sliding the pump housing into place,
the crankshaft pin will begin to protrude from
the bearing in the center of the pump housing.
Position the slider assembly so that as the
crankshaft pin protrudes from the main bearing,
it engages the connecting rod bearing.
IMPORTaNT: Do not force the pump housing and gear
housing together.
29. Locate the four socket screws and lock washers that
secure the pump housing to the gear housing.
30. Using a 1/4" hex wrench, snug and tighten the socket
screws in a crossing pattern. Torque to 200–230 in./lbs.
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