Forward Clutch

Disassembly





1. After removing retaining ring (1), remove direct clutch input hub (2) and forward clutch hub (3).





2. Remove bearing race and thrust bearing.





3. Install direct clutch input hub (1) and retaining ring (2).





4. Install forward clutch (2) to O/D case (1). Apply 4 - 8 kgf/cm2 air pressure into fluid hole at the right of cut in O/D case and measure movement of forward clutch piston.
If measured value is not within standard range, use either 1.8 mm (0.071 inch) or 2.0 mm (0.079 inch) clutch disc to adjust it to standard value.
Standard forward clutch piston movement 1.40 - 1.70 mm (0.056 - 0.067 inch)
5. Remove retaining ring (1) and then remove direct clutch input hub.





6. Remove retaining ring and then remove all clutch discs.
7. Using special tool and hydraulic press, compress forward clutch piston return spring and remove retaining return spring.
Special tool
(A): 09926-98310

CAUTION: Be careful when applying pressure, for overpressure will cause plate section of piston return spring to deform.





8. Remove forward clutch piston return spring.





9. Install forward clutch to O/D case. Blow low pressure air into fluid hole at the right of cut in O/D case to remove forward clutch piston.

Forward Clutch Inspection
Forward Clutch Piston
^ Shake piston to check that ball is not stuck.





^ Blow low pressure air to check ball section for leakage.

Forward Clutch Piston Return Spring





^ Measure free length.
Standard free length of forward clutch piston return spring 15.13 mm (0.596 inch)