8. 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: 390 kPa (4.0 kgf/cm2, 57 psi) max.
Low And Reverse Brake Clearance
Measure the clearance between the retaining plate and the snap ring. Make several measurements and calculate the average value. If the clearance is not within specification, replace parts as necessary.
Low and reverse brake clearance: 1.5 - 1.8 mm (0.059 - 0.071 inch)
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.
Disassembly Note
Snap Ring
1. Install the SSTs in the transaxle case as shown.
CAUTION: Depress the spring only enough to install the snap ring. Overpressing will damage the assembly edges.
2. Compress the spring and retainer assembly.
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: 390 kPa (4.0 kgf/cm2, 57 psi) max.
Inspection
Drive Plates
1. Measure the facing thickness in three places, and determine the average of the three readings.
Standard: 1.6 mm (0.063 inch)
Minimum: 1.4 mm (0.055 inch)
2. If not within specification, replace the drive plates.
Spring And Retainer Assembly
1. Measure the free length of each spring and check for deformation.
Free length: 18.07 mm (0.7114 inch)
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: 156.5 mm (6.1161 inch)
Outer seal: 188.0 mm (7.402 inch)
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. Overpressing will damage the retainer assembly edges.
4. Compress the spring and retainer assembly.
5. Install the snap ring.
6. Remove the SSTs.
7. Install the dished plate as shown in the figure.
8. Install the drive and driven plates in the following order.
Driven-Drive-Driven-Drive-Driven-Drive-Driven-Drive
9. Install the retaining plate.
10. Install the snap ring.
11. Measure the clearance between the low and reverse brake retaining plate and the snap ring. Make several measurements and calculate the average value. If the clearance is not within specification, adjust it by selecting a proper plate from below.
Low and reverse brake clearance: 1.5 - 1.8 mm (0.059 - 0.071 inch)
Retaining plate sizes
12. Check the low and reverse brake operation by applying compressed air through the fluid passage as shown in the figure.
Air pressure: 390 kPa (4.0 kgf/cm2, 57 psi) max.