Reverse Clutch

COMPONENTS

DISASSEMBLY




1. Check operation of reverse clutch.
a. Install seal ring onto oil pump cover and install reverse clutch. Apply compressed air to oil hole.
b. Check to see that retaining plate moves to snap ring.
c. If retaining plate does not move to snap ring, D-ring or oil seal may be damaged or fluid may be leaking at piston check ball.




2. Remove drive plates, driven plates, retaining plate, dish plate and snap ring.




3. Remove snap ring from clutch drum while compressing clutch springs.
- Do not expand snap ring excessively.

4. Remove spring retainer and return spring.




5. Install seal ring onto oil pump cover and install reverse clutch drum. While holding piston, gradually apply compressed air to oil hole until piston is removed.
- Do not apply compressed air abruptly.

6. Remove D-ring and oil seal from piston.

INSPECTION

Reverse clutch snap ring and spring retainer
- Check for deformation, fatigue or damage.

Inspection Standard:

Reverse clutch return springs
- Check for deformation or damage. Also measure free length and outside diameter.




Reverse clutch drive plates
- Check facing for burns, cracks or damage.
- Measure thickness of facing.

Thickness of drive plate:
Standard value: 2.0 mm (0.079 in)
Wear limit: 1.8 mm (0.071 in)

- If not within wear limit, replace.

Reverse clutch dish plate
- Check for deformation or damage.




Reverse clutch piston
- Shake piston to assure that balls are not seized.
- Apply compressed air to check ball oil hole opposite the return spring to assure that there is no air leakage.
- Also apply compressed air to oil hole on return spring side to assure that air leaks past ball.

ASSEMBLY




1. Install D-ring and oil seal on piston.
- Apply A.T.F. to both parts.




2. Install piston assembly by turning it slowly and evenly.
- Apply A.T.F. to inner surface of drum.




3. Install return springs and spring retainer.




4. Install snap ring while compressing clutch springs.




- Do not align snap ring gap with spring retainer stopper.




5. Install drive plates, driven plates, retaining plate and dish plate.




6. Install snap ring.




7. Measure clearance between retaining plate and snap ring. If not within allowable limit, select proper retaining plate.

Specified clearance:
Standard: 0.5 - 0.8 mm (0.020 - 0.031 in)
Allowable limit: 1.2 mm (0.047 in)

Retaining plate: Refer to S.D.S.




8. Check operation of reverse clutch. Refer to "DISASSEMBLY" of Reverse Clutch.