Pump Assembly

Pump Assembly





Special Tool(s)

Disassembly





1. Remove the separator plate and gaskets, discard the gaskets.





2. Remove the check ball and note the location.





3. Remove the relief valve and note the location.





4. Remove the Pump cover.





5. WARNING: Use extreme caution when removing the spring to prevent personal injury. Failure to follow these instructions may cause personal injury.

CAUTION: Place a piece of cardboard or a suitable material under a screwdriver to prevent damage to the housing gasket surface.

Remove the pump bore ring spring.





6. Remove the outside vane support retaining pin.





7. Remove the metal bore ring and support seal.
1. Remove the bore ring side seal (metal).
2. Remove the support seal (O-Ring).





8. Remove the pump bore ring radial seal and support.
1. Remove the pump bore ring radial seal (orange rectangular).
2. Remove the pump bore ring radial seal support (black round).





9. Remove the top pump vane support ring.





10. Remove the outer pump bore ring.





11. Remove the vanes.





12. Remove the rotor.





13. Remove the bottom pump vane support ring.





14. Remove the bolts.





15. Remove the retaining ring.





16. Remove the TCC, and EPC solenoid.





17. NOTE: The shift solenoids are interchangeable. Take note of the shift solenoid connector orientation.

Remove the shift solenoids by pressing the locking tabs with a screwdriver and rotating them.

Assembly





1. NOTE: Be sure the solenoids are locked in place by pressing down and rotating them.

Install new O-rings and install the shift solenoids by pressing down and rotating them until they lock in place.





2. Install new O-rings and install the EPC and TCC solenoids.





3. Install the TCC solenoid retaining ring.





4. Install the bolts.





5. Install the bottom pump vane support ring.





6. NOTE: The counter bore area is where the pump shaft and mating splines pass through the rotor.

Install the rotor with the counter bore facing up.





7. NOTE: The shiny portion of the vane blade is installed outward toward the pump bore ring.

Install the pump vanes.





8. Install the pump body ring with the O-ring groove facing up.





9. Install the top pump vane support ring.





10. Install the pump bore ring radial seal and support.
1. Install the pump bore ring radial seal (orange rectangular).
2. Install the pump bore ring radial seal support (black round).





11. Install the metal bore ring and support seal.
1. Install the support seal (O-ring).
2. Install the bore ring side seat (metal).





12. Remove the outside vane support retaining pin.





13. CAUTION: Be sure the pump bore area is well cleaned. It is a hidden trap for foreign material. Flow from the pump goes into the manual valve circuit, then passes into the EPC circuit. Pump pressure at this point is very high. Any foreign material not cleaned out here will be pumped through the transaxle on the first operation.

Install the pump bore ring spring between the case and the tab on the pump bore ring.





14. NOTE: Use the pump drive shaft to align the pump cover during installation.

Install the pump cover and bolts.





15. Install the relief valve.





16. Install the check balls.





17. Using the special tools, install the separator plate and the gaskets.





18. Using the special tools, assemble the main control assembly.





19. Install the bolts.