Forward Clutch

Preliminary Check





Check forward clutch clearance before disassembly. For checking clearance, measure height between snap ring and clutch flange by using vernier as shown in figure. If height is within specification, it means that clutch clearance is within specification. If height is out of specification, replace clutch discs or plates with new ones.
Height "a": 2.01 - 2.68 mm (0.079 - 0.105 inch)

Removal





1. Remove clutch plate snap ring.
2. Remove flange, discs and plates.





3. Remove seat snap ring. Compress piston return springs and remove snap ring. Place special tool (clutch spring compressor) on spring seat and compress spring with a press, and then, remove snap ring, using a screwdriver.

CAUTION: Do not push down return spring more than necessary.

Special Tool
(A): 09926-98310





4. Remove spring seat and springs.
5. Remove forward clutch piston. Blow compressed air through input shaft oil hole to remove piston. If piston does not pop out, take it out with long nose pliers.
6. Remove inner and outer seals (O-rings) from piston.

Inspection
1. Check valve (ball) for free movement in clutch piston.
2. Check valve for leakage by using low pressure air. If found faulty, replace clutch piston.

Installation





1. Install inner and outer seals (O-rings) to clutch piston.
Apply transmission fluid to them and fit to piston. Use new seals.
2. Install piston into input shaft drum.
Use care so that seals do not get twisted or caught.
3. Install 18 piston return springs and spring seat.





4. Install spring seat snap ring.
Compress return springs and install snap rings in groove by using a screwdriver.
Place special tool (clutch spring compressor) on spring seat and compress springs with a press.

CAUTION:
^ Check to make sure that snap ring is securely fitted in 4 projections of spring seat.
^ Do not compress return spring more than necessary.

Special Tool
(A): 09926-98310





5. Install discs, plates and flange in following order.
(1) Plate -> (2) Disc -> (3) Plate -> (4) Disc -> (5) Plate -> (6) Disc (7) Flange

NOTE: Before assembly, new discs should be soaked in automatic transmission fluid for 2 hours or more.

6. Install clutch plate snap ring.








7. After installing clutch plate snap ring, measure height between snap ring and clutch flange as previously outlined. If discs and plates are new and yet out of specification, install flange of different thickness. Following 2 types of clutch flanges are available as spare parts.
Height "a": 2.01 - 2.68 mm (0.079 - 0.105 inch)





8. Check clutch piston for movement by blowing air through input shaft oil hole.

CAUTION: Apply only low pressure air, or spring seat may be damaged.