Low and Reverse Brake
LOW AND REVERSE BRAKEPreparation
SST
Preinspection
Low and reverse brake operation
Check the low and reverse brake operation by applying compressed air as shown.
Air pressure:
392 kPa (4.0 kgf/cm2, 57 psi) max.
Clutch clearance
Note: Make several measurements and calculate the average value.
1. Measure the clearance between the retaining plate and the snap ring.
Low and reverse brake clearance:
2.1 - 2.4 mm (0.083 - 0.094 in)
2. If not as specified, replace parts as necessary.
3. Select and install the correct snap ring when assembling.
Disassembly / inspection / Assembly
1. Disassemble as shown in the figure, referring to Disassembly note.
2. Assemble in the reverse order of disassembly, referring to Assembly procedure.
Low and Reverse Brake:
Disassembly note
Snap ring
1. Install the SSTs in the transaxle case as shown.
Caution: Depress the spring and retainer assembly only enough to remove the snap ring.
2. Compress the spring and retainer assembly.
Caution: Do not deform the snap ring when removing it.
3. Remove the snap ring.
4. Remove the SSTs and remove the spring and retainer assembly.
Low and reverse brake piston
Remove the low and reverse brake piston by applying compressed air through the fluid passage.
Air pressure:
392 kPa (4.0 kgf/cm2, 57 psi ) max.
Inspection
Drive plates
1. Measure the facing thickness in three places, and calculate the average value.
Standard: 1.6 mm (0.063 in)
Minimum: 1.4 mm (0.055 in)
2. If not within specification, replace the drive plates.
Spring and retainer assembly
Note: Do not compress the spring when measuring it with vernier calipers.
1. Measure the free length of each spring and check for deformation.
Free length: 14.3 mm (0.563 in)
2. If not within specification, replace the spring and retainer assembly.
Assembly procedure
1. Install the low and reverse brake piston.
1) Apply ATF to the new inner and outer seals, and install them onto the low and reverse brake piston.
Seal ring inner diameter
Inner seal: 140.7 mm (5.539 in)
Outer seal: 170.5 mm (6.713 in)
2) Face the outer seal lip toward the inside by gently rolling it down around the circumference for easier installation into the case.
3) Install the low and reverse brake piston by pushing evenly around the circumference, being careful not to damage the outer seal.
2. Install the spring and retainer assembly.
3. Install the SSTs in the transaxle case as shown.
Caution: Depress the spring and retainer assembly only enough to install the snap ring.
4. Compress the spring and retainer assembly.
Caution: Do not deform the snap ring when installing it.
5. Install the snap ring.
6. Remove the SSTs.
Caution: Installation order: Driven-Drive-Driven-Drive-Driven-Drive-Driven-Drive
7. Install the drive and driven plates.
8. Install the retaining plate.
Caution: Do not deform the snap ring when installing it.
9. Install the snap ring.
10. Measure the low and reverse brake clearance.
Note: Make several measurements and calculate average value.
1) Measure the clearance between the snap ring and the low and reverse brake retaining plate.
Low and reverse brake clearance:
2.1 - 2.4 mm (0.083 - 0.094 in)
2) If not within specification, adjust it by selecting a proper snap ring from below.
Snap ring sizes
11. Check the low and reverse brake operation by applying compressed air through the fluid passage as shown in the figure.
Air pressure:
392 kPa (4.0 kgf/cm2, 57 psi) max.