Reverse Clutch

REVERSE CLUTCH






DISASSEMBLY




1. Check operation of reverse clutch
a. Install seal ring onto drum support of oil pump cover and install reverse clutch assembly. 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 snap ring.
3. Remove drive plates, driven plates, retaining plate, and dish plates.




4. Set Tool on spring retainer and remove snap ring from reverse clutch drum while compressing return springs.
- Set Tool directly above springs.
- Do not expand snap ring excessively.

5. Remove spring retainer and return springs.




- Do not remove return springs from spring retainer.




6. Remove piston from reverse clutch drum by turning it.




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

INSPECTION
Reverse clutch snap ring, spring retainer and return springs
- Check for deformation, fatigue or damage.
- Replace if necessary.
- When replacing spring retainer and return springs, replace them as a set.

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 plates




- Check for deformation or damage.
- Measure thickness of dish plate.

Thickness of dish plate: 2.8 mm (0.110 in.)

- If deformed or fatigued, replace.

Reverse clutch piston




- Make sure check balls are not fixed.
- Apply compressed air to check ball oil hole opposite the return spring to make sure that there is no air leakage.
- Apply compressed air to oil hole on return spring side to make sure air leaks past ball.

ASSEMBLY




1. Install D-ring and oil seal on piston.
- Take care with the direction of the oil seal.
- Apply A.T.F. to both parts.




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




3. Install return springs and spring retainer on piston.




4. Set Tool on spring retainer and install snap ring while compressing return springs.
- Set Tool directly above return springs.




5. Install drive plates, driven plates, retaining plate and dish plates.
- Do not align the projections of any two dish plates.
- Take care with the order and direction of plates.




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 Specifications.




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