Forward Clutch Cylinder

Forward Clutch Cylinder





Special Tool(s)

Part 1 Of 2:

Part 2 Of 2:

Forward Clutch-Disassembled View

Disassembly
1. Inspect the clutch cylinder thrust surfaces, piston bore and clutch plate serrations for scores or burrs. Minor scores or burrs may be removed with crocus cloth. Install a new clutch cylinder if it is badly scored or damaged.
2. Check the fluid passage in the clutch cylinder for obstructions. Clean out all the fluid passages. Inspect the clutch piston for scores and install a new piston if necessary. Inspect check balls for freedom of movement and correct seating.
3. Check the clutch release spring for distortion and cracks. Install a new spring (including wave spring) if distorted or cracked.
4. Inspect the composition clutch plates, steel clutch plates and clutch pressure plate for worn or scored bearing surfaces. Install new parts if they are deeply scored or burred.
5. Check the clutch plates for flatness and fit on clutch hub serrations. Discard any plate that does not slide freely on serrations or that is not flat.
6. Check the clutch hub thrust surfaces for scores and clutch hub splines for wear.





7. NOTE: The forward clutch hub may remain in the shell during disassembly.

Remove the forward clutch hub and the No. 3 forward clutch hub front bearing.





8. NOTE: To aid handling, the forward clutch assembly may be set in the extension housing or a hole in the work bench.

Remove the forward clutch pack selective retaining ring.





9. Remove the following components.
1 Remove the pressure plate.
2 Remove the clutch pack.
3 Remove the pressure spring.





10. CAUTION: Apply only enough pressure to release pressure on the retaining ring. If too much pressure is applied, the spring may break.

Using the special tool, remove the forward clutch retaining ring.
11. Slowly release the press and remove the forward clutch from the press.





12. Remove the forward clutch retainer and the return spring.





13. NOTE: Air pressure may be required to remove the forward clutch piston.

Remove the forward clutch piston.





14. Remove the inner and outer forward clutch piston seals.





15. NOTE: The seals are solid seals, however, when installing new seals use scarf-cut seals.

Remove the forward clutch input shaft seals.





16. Make sure the check ball in the clutch cylinder is free and clean. Check for correct seating.

Assembly
1. Inspect the clutch cylinder thrust surfaces, piston bore and clutch plate serrations for scores or burrs. Minor scores or burrs may be removed with crocus cloth. Install a new clutch cylinder if badly scored or damaged.
2. Check the fluid passage in the clutch cylinder for obstructions. Clean out all fluid passages. Inspect the clutch piston for scores and install a new piston if necessary. Inspect check balls for freedom of movement and correct seating.
3. Check the clutch release spring for distortion and cracks. Install a new spring (including the wave spring) if distorted or cracked.
4. Inspect composition clutch plates, steel clutch plates and clutch pressure plate for worn or scored bearing surfaces. Install new parts if they are deeply scored or burred.
5. Check the clutch plates for flatness and fit on the clutch hub serrations. Discard any plate that does not slide freely on serrations or that is not flat.
6. Check the clutch hub thrust surfaces for scores and the clutch hub splines for wear.





7. NOTE: To aid handling, the forward clutch assembly may be set in the extension housing or a hole in the work bench.

Install the inner and outer forward clutch piston seals. Note the direction of the sealing rings before installation.





8. NOTE: Coat the piston seals and clutch drum sealing area with petroleum jelly.

Position the special tools on the clutch piston.





9. Using the special tools, install the forward clutch piston into the clutch drum.
^ Push the piston to the bottom of the drum using even pressure.





10. Using the special tool, compress the piston return spring and install the retaining ring.
11. Slowly release the press pressure and remove the forward clutch.





12. NOTE: Before assembly, soak the new clutch discs in clean automatic transmission fluid for 15 minutes.

Install the clutch pack assembly.
1 Install the pressure ring.
2 Install the clutch pack.
3 Install the pressure plate.





13. Install the clutch pack retaining ring.





14. Install the special tool on the forward clutch pack.
^ Push downward on the clutch pack.
^ Release pressure and zero the dial indicator.





15. Using the special tool, check the clutch pack clearance.
1 Lift up on the clutch pack until it fully seats against the clutch pressure plate retainer.
2 Read the dial indicator.
^ If the clearance is not within specifications, install the correct size retaining ring.





Selective Retaining Ring





16. NOTE: Make sure the scarf-cut seals are mated correctly.

Slide the two scarf-cut seals on the input shaft.





17. Install the two scarf-cut seals on the input shaft.





18. Install the No. 3 forward clutch hub front bearing and the forward clutch hub.