Front Clutch
FRONT CLUTCH
Components
Front Clutch Disassembly
1. INSTALL FRONT CLUTCH ASSEMBLY TO OVERDRIVE (O/D) CASE
2. REMOVE REAR CLUTCH HUB AND FRONT CLUTCH HUB
a. Using a screwdriver, remove the snap ring.
b. Remove the rear clutch hub and front clutch hub.
c. Remove the bearing and 2 races.
3. CHECK PISTON STROKE OF FRONT CLUTCH
a. Before checking the piston stroke, install the rear clutch hub.
b. Install the snap ring.
c. Using Special Service Tools (SST) and a dial indicator, measure the front clutch piston stroke while applying and releasing compressed air (392 - 785 kPa, 4 - 8 kgf/cm2, 57 - 114 psi).
SST 09350-20015 (09350-06120)
Piston stroke: 1.32 - 2.66 mm (0.0520 - 0.1047 inch)
If the values are non-standard, inspect the discs.
d. Remove the snap ring and rear clutch hub.
4. REMOVE DISCS AND PLATES
a. Using a screwdriver, remove the snap ring.
b. Remove the 4 discs and 4 plates.
5. REMOVE PISTON RETURN SPRINGS
a. Place SST on the spring seat and compress the return springs with a shop press.
SST 09350-20015 (09369-20040)
b. Using a snap ring expander, remove the snap ring.
c. Remove the piston return spring.
6. REMOVE FRONT CLUTCH PISTON
a. Place the front clutch drum onto the O/D case.
d. Hold the front clutch piston with hand, apply compressed air to the O/D case to remove the front clutch piston.
c. Remove the 2 O-rings from the piston.
Front Clutch Inspection
1. INSPECT DISC AND PLATE
Check to see if the sliding surface of the disc and plate are worn or burnt. If necessary, replace them.
HINT:
- If the lining of the disc is peeling off or discolored, or even if parts of the printed numbers are defaced, replace all discs.
- Before assembling new discs. soak them in Automatic Transmission Fluid (ATF) for at least 15 minutes.
2. CHECK FRONT CLUTCH PISTON
a. Check that check ball is free by shaking the piston.
b. Check that the valve does not leak by applying low pressure compressed air.
Front Clutch Assembly
1. INSTALL FRONT CLUTCH PISTON
a. Coat new O-rings with ATF and install them on the front clutch piston.
b. Place SST on the front clutch piston.
SST 09350-20015 (09369-20040)
c. Being careful not to damage the O-rings, press the clutch piston into the front clutch drum with both hands.
2. INSTALL PISTON RETURN SPRING
a. Install the piston return spring.
b. Place SST on the spring seat, and compress the return springs with a shop press.
SST 09350-20015 (09369-20040)
c. Install the snap ring with a snap ring expander. Be sure the end gap of the snap ring is not aligned with the spring seat claw.
3. INSTALL PLATES AND DISCS
a. Install the 4 plates and 3 discs.
Install in order: P=Plate D= Disc
P - D - P - D - P - D - P
b. Install the snap ring. Be sure the end gap of the snap ring is not aligned with the cutout portion of the front clutch drum.
c. Install the disc.
4. CHECK PISTON STROKE OF FRONT CLUTCH
a. Before checking the piston stroke, install the rear clutch hub.
b. Install the snap ring.
c. Using SST and a dial indicator, measure the front clutch piston stroke while applying and releasing compressed air (392 - 785 kPa, 4 - 8 kgf/cm2 , 57 - 114 psi).
SST 09350-20015 (09350-06120)
Piston stroke: 1.32 - 2.66 mm (0.0520 - 0.1047 inch)
If the piston stroke is less than the limit, parts may have been assembled incorrectly, check and reassemble again. If the piston stroke is nonstandard, select another plate.
HINT: There are 2 different thicknesses for the plate.
Plate thickness:
1.8 mm (0.071 inch)
2.0 mm (0.079 inch)
d. Remove the snap ring and rear clutch hub.
5. INSTALL FRONT CLUTCH HUB
a. Coat the bearing and races with petroleum jelly and install them onto the front clutch drum.
Bearing and races diameter
b. Install the front clutch hub into the front clutch drum.
HINT: Mesh the splines of the front clutch hub with the flukes of the discs by rotating and pushing the front clutch hub.
6. INSTALL REAR CLUTCH HUB
a. Install the rear clutch hub.
b. Install the snap ring. Be sure the end gap of the snap ring is not aligned with the cutout portion of the front clutch drum.