Part 1
COMPONENTS
DISASSEMBLY OF OVERDRIVE BRAKE
1. REMOVE PISTON RETURN SPRING
a. While pushing the return spring, remove the snap ring with a screwdriver.
b. Remove the piston return spring.
2. REMOVE PLATES, DISCS AND FLANGE
3. REMOVE PISTON FROM DRUM
Apply compressed air to oil hole to remove the piston.
NOTE: Blow with the gun slightly away from the oil hole, and be careful that the piston dose not tilt.
4. REMOVE 0-RINGS
Remove the inner and outer 0-rings from the piston.
INSPECTION OF OVERDRIVE BRAKE
INSPECT DISCS, PLATES AND FLANGE
Check if the sliding surfaces of the discs, plates and flange are worn or burnt. If necessary, replace them.
NOTE:
- If the lining of the disc is exfoliated or discolored, or even a part of the printed numbers are defaced, replace all discs.
- Before assembling new discs, soak them in ATF for at least fifteen minutes.
DISASSEMBLY OF OVERDRIVE DIRECT CLUTCH
1. CHECK PISTON STROKE OF DIRECT CLUTCH
Using a dial indicator, measure the piston stroke while applying and releasing the compressed air (4 - 8 kg/sq.cm, 57 - 114 psi or 392 - 785 kPa) as shown.
SST 09350-32014 (09351-32190)
Piston stroke: 1.75 - 2.49 mm (0.0689 - 0.0980 in.)
If the piston stroke is greater than the maximum, inspect each component.
2. REMOVE OVERDRIVE DIRECT CLUTCH FROM CASE
3. REMOVE BEARING AND RACE FROM CLUTCH DRUM AND CASE
4. REMOVE SNAP RING WITH SCREWDRIVER
5. REMOVE FLANGES, DISCS AND PLATES
6. REMOVE PISTON RETURN SPRING
a. Place SST on the spring retainer and compress the spring with a shop press.
SST 09350-32014 (09351-32070, 09351-32200)
b. Remove the snap ring.
c. Remove the piston return spring.
7. REMOVE PISTON FROM CLUTCH DRUM
a. Install the clutch drum on the case.
b. Apply compressed air to the pressure apply hole of the case.
c. Remove the piston from the clutch drum. If the piston does not come out completely, use needle-nose pliers to remove it.
d. Remove the clutch drum from the case.
8. REMOVE 0-RINGS
Remove the two 0-rings from the piston.
INSPECTION OF OVERDRIVE DIRECT CLUTCH
1. INSPECT OVERDRIVE DIRECT CLUTCH
a. Check that the check ball is free by shaking the piston.
b. Check that the valve does not leak by applying low-pressure compressed air.
2. INSPECT DISCS, PLATES AND FLANGES
Check if the sliding surfaces of the discs, plates and flanges are worn or burnt. If necessary, replace them.
NOTE:
- If the lining of the disc is exfoliated or discolored, or even a part of the printed numbers are defaced, replace all discs.
- Before assembling new discs, soak them in ATF for at least fifteen minutes.
3. CHECK DIRECT CLUTCH BUSHING
Using a dial indicator, measure the inside diameter of the two direct clutch bushings.
Maximum inside diameter: 22.13 mm (0.8713 in.)
If the inside diameter is greater than the maximum, replace the direct clutch drum.
ASSEMBLY OF OVERDRIVE DIRECT CLUTCH
1. INSTALL CLUTCH PISTON
a. Install new 0-rings to the piston. Coat the 0-rings with ATF.
b. Press the piston into the drum with the cup side up, being careful not to damage the 0-ring.
2. INSTALL PISTON RETURN SPRING
a. Install the return spring and set snap ring in place.
b. Place SST on the spring retainer, and compress the spring with a shop press.
SST 09350-32014 (09351-32070, 09351-32200)
c. Install the snap ring with a screwdriver. Be sure end gap of snap ring is aligned with the groove of the clutch drum.
3. INSTALL PLATES, DISCS AND FLANGE
Install in order: P = Plate D = Disc
P - D - P - D - Flange
4. INSTALL SNAP RING
Be sure end gap of the snap ring is not aligned with the groove of the clutch drum.
5. INSTALL BEARING AND RACE
a. Coat the bearing with petroleum jelly and install it facing the race side downward to the clutch drum.
Bearing:
Outer diameter 46.3mm (1.823 in.)
Inner diameter 26.2mm (1.031 in.)
b. Coat the race with petroleum jelly and install it to the case.
Race:
Outer diameter 43.0mm (1.693 in.)
Inner diameter 24.5mm (0.965 in.)
6. INSTALL DIRECT CLUTCH ON CASE
7. RECHECK PISTON STROKE OF DIRECT CLUTCH
Using a dial indicator, measure the piston stroke while applying and releasing the compressed air (4 - 8 kg/sq.cm, 57 - 114 psi or 392 - 785 kPa) as shown.
SST 09350-32014 (09351-32190)
Piston stroke: 1.75 - 2.49mm (0.0689 - 0.0980 in.)