High Clutch

HIGH CLUTCH








1. Check operation of high clutch.
a. Apply compressed air to oil hole of input shaft.
- Stop up a hole on opposite side of input shaft.
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 seal rings from input shaft.




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




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

6. Remove spring retainer and return springs.




- Do not remove return spring from spring retainer.




7. Remove piston from high clutch drum by turning it.




8. 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.

High clutch drive plates




- Check facing for burns, cracks or damage.
- Measure thickness of facing.

Thickness of drive plate:
RL4F03A
Standard value: 2.0 mm (0.079 in.)
Wear limit: 1.8 mm (0.071 in.)

RL4F03V
Standard value: 1.6 mm (0.063 in.)
Wear limit: 1.4 mm (0.055 in.)

- If not within wear limit, replace.

High clutch dish plate




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

Thickness of dish plate: 2.7 mm (0.106 in.)

- If deformed or fatigued, replace.

High 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.

Seal ring clearance




- Install new seal rings onto input shaft.
- Measure clearance between seal ring and ring groove.

Standard clearance: 0.08 - 0.23 mm (0.0031 - 0.0091 in.)

Allowable limit: 0.23 mm (0.0091 in.)

- If not within wear limit, replace input shaft assembly.

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.




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




5. Install drive plates, driven plates, retaining plate and dish plate.
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: 1.4 - 1.8 mm (0.055 - 0.071 in.)

Allowable limit:
RL4F03A 2.4 mm (0.094 in.)
RL4F03V 2.6 mm (0.102 in.)
Retaining plate: Refer to Specifications.




8. Check operation of high clutch.
Refer to "DISASSEMBLY" in "High Clutch".

9. Install seal rings to input shaft.




- Apply petroleum jelly to seal rings.




- Roll paper around seal rings to prevent seal rings from spreading.