Forward Clutch

U151F AUTOMATIC TRANSAXLE: FORWARD CLUTCH: INSPECTION

1. INSPECT PACK CLEARANCE OF FORWARD CLUTCH

(a) Install the forward clutch on the oil pump.





NOTICE:
Be careful not to damage the oil seal ring of the oil pump.

(b) Using a dial indicator, measure the forward clutch pack clearance while applying and releasing compressed air (392 kPa, 4.0 kgf/cm2, 57 psi).

Pack clearance:

1.00 to 1.25 mm (0.0394 to 0.4921 in.)

If the clearance is not as specified, inspect the discs, plates, and flange.

HINT
If the opening is large, cover it with a shop rag or a piece of cloth to prevent the compressed air from being released.

2. INSPECT FORWARD MULTIPLE DISC CLUTCH DISC

(a) Check if the sliding surface of the disc, plate, and flange are worn or burnt.





If necessary, replace them.

HINT
* If the lining of the disc comes off or discolors, or if a part of the groove is worn, replace all discs.
* Before installing new discs, immerse them in ATF for at least 15 minutes.

3. INSPECT FORWARD CLUTCH RETURN SPRING SUB-ASSEMBLY

(a) Using vernier calipers, measure the free length of the spring together with the spring seat.





Standard free length:

26.74 mm (1.0528 in.)

If the result is not as specified, replace the spring.

4. INSPECT PACK CLEARANCE OF FORWARD CLUTCH

(a) Using a dial indicator, measure the forward clutch pack clearance while applying and releasing compressed air (392 kgf/cm2, 4.0 kPa, 57 psi).





Pack clearance:

1.00 to 1.25 mm (0.0394 to 0.0492 in.)

If the piston stroke is less than the minimum, the parts may be assembled incorrectly. Check and reassemble the parts again.

If the clearance is not as specified, select another flange.

HINT
There are 5 different thicknesses of flanges available.

Flange thickness: mm (in.)





5. INSPECT FORWARD MULTIPLE DISC CLUTCH DISC

(a) Check if the disc lightly rotates when rotating the forward clutch assembly after inserting the multiple disc clutch into it.





NOTICE:
Do not place the forward clutch assembly in a vise.

If the result is not as specified, replace the forward multiple disc clutch disc.