Front Brake and Coast Clutch Drum Assembly

Front Brake and Coast Clutch Drum Assembly









Front Brake and Coast Clutch Drum Assembly









Disassembly

1. NOTE: This is a select fit ring. See assembly procedure if installation of a new ring or clutch plate is required.

Remove the coast clutch pressure plate.

1. Remove the coast clutch retaining ring.

2. Remove the coast clutch pressure plate.





2. NOTE: Coast clutch friction plates are directional. Note direction of grooves for installation.

Remove the coast clutch disc pack.

- Inspect for wear, install new as necessary.





3. WARNING: While removing or installing the retaining ring, slowly release tool pressure on clutch piston springs. Failure to follow this instruction may cause the assembly to separate forcefully, resulting in serious personal injury.

NOTICE: Do not fully compress the Clutch Spring Compressor or damage to the spring retainer can occur.

Using the Clutch Spring Compressor, remove the coast clutch piston retaining ring.





4. Relieve the direct clutch spring tension and remove the Clutch Spring Compressor.

5. Remove the coast clutch piston springs.

1. Remove the coast clutch piston spring retainer.

2. Remove the 20 clutch piston springs.





6. WARNING: When using compressed air, never let air pressure exceed 138 kPa (20 psi) and always wear safety glasses. Compressed air may cause foreign material or parts to become airborne. Failure to follow this instruction may result in serious personal injury.

Remove the coast clutch piston.
- Apply air pressure to the hole in the drum to remove the coast clutch piston while blocking the other hole.





7. Remove the coast clutch piston inner seal and the coast clutch piston outer seal.





Assembly

1. NOTE: The lip seals must be positioned as shown. Care must be taken to prevent rollover of the lip seal.

Install the new coast clutch piston inner and outer seal.





2. NOTE: Lubricate the coast clutch piston inner and outer seal with transmission fluid.

Install the coast clutch piston into the Piston Seal Sizer.





3. Inspect the coast clutch components for damage or wear. Install new as necessary.
- Inspect the drum band surface, bushing and thrust surfaces for scores. Minor scores may be removed with a crocus cloth. Badly scored parts must be installed as new.

- Inspect the clutch piston bore and the clutch piston and the piston inner and outer bearing surfaces for scores.

- Check the fluid passages for obstructions. All fluid passages must be clean and free of obstructions.

- Inspect the clutch plates for wear, scoring and fit on the clutch hub serrations.

- Inspect the clutch pressure plate for scores on the clutch plate surface. Check the clutch release spring(s) for distortion.

- Verify the check ball in the front band brake and coast clutch drum is free to move and clear of foreign material.





4. NOTICE: Care must be taken to prevent damage to the seals during installation.

Install the coast clutch piston into the front band brake and coast clutch drum.





5. Carefully remove the coast clutch piston from the Piston Seal Sizer.





6. Install the coast clutch piston springs.

1. Install the 20 coast clutch piston springs.

2. Position the coast clutch piston spring retainer on the coast clutch piston springs.





7. NOTICE: Do not fully compress the Clutch Spring Compressor or damage to the coast clutch piston spring retainer may occur.

Using the Clutch Spring Compressor, install the coast clutch piston spring retainer ring.





8. Relieve the direct clutch spring tension and remove the Clutch Spring Compressor.

9. NOTICE: Coast clutch friction plates are directional and must be installed with grooves clockwise (ID to OD). The word TOP should face up. Improper installation can result in transmission damage.

NOTE: If new clutch plates are being used, they should be soaked in clean transmission fluid before assembly.

When installing friction plates, the word TOP should face up. If reusing plates, grooves must be installed clockwise. Install the coast clutch disc pack.





10. Install the 2 steel clutch plates and 2 friction clutch plates in alternating order starting with a steel clutch plate.





11. NOTE: The retaining ring is select fit.

Install the coast clutch pressure plate.

1. Install the clutch pressure plate.

2. Install the original coast clutch retaining ring.





12. WARNING: When using compressed air, never let air pressure exceed 138 kPa (20 psi) and always wear safety glasses. Compressed air may cause foreign material or parts to become airborne. Failure to follow this instruction may result in serious personal injury.

NOTE: The coast clutch piston is applied with air pressure and released when the air is removed.

Air check the assembly.
- Apply air pressure to the hole in the drum while blocking the other hole.





13. Check the coast clutch disc pack free play.

1. Push down on the coast clutch pressure plate.

2. Using a feeler gauge, check clearance between the coast clutch retaining ring and coast clutch pressure plate. Clearance should be 1.3-2.0 mm (0.051-0.078 in). If clearance is not within the specification, install a new coast clutch retaining ring that will correct free play adjustment.