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 transaxle case and the driven plate. Make several measurements and calculate the average value. If the clearance is not within specification, replace parts as necessary.
Low and reverse brake clearance: 1.7 - 2.1 mm (0.067 - 0.826 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 SST in the transaxle case as shown.
2. Compress the spring and retainer assembly.
3. Remove the snap ring.
4. Remove the SST 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
Spring And Retainer Assembly
1. Measure the spring free length.
2. If not within the specifications, replace the spring.
Drive Plates
1. Measure the facing thickness in several places, and determine the average of the three readings.
Standard: 1.6 mm (0.063 inch)
Minimum: 1.4 mm0 (0.055 inch)
2. If not within the specification, replace the drive plates.
Assembly Procedure
1. Install the drive and driven plates in the following order:
Driven-Drive-Driven-Drive-Driven-Drive-Driven-Drive
-Driven-Drive-Driven-Drive-Driven-Drive
2. Install the dish plate.
3. Install the retaining plate.
4. Install the snap ring.
5. 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: 138.6 mm (5.457 inch)
Outer seal: 156.8 mm (6.173 inch)
2. Install the low and reverse brake piston by pushing evenly around the circumference, being careful not to damage the outer seal.
6. Install the low and reverse brake spring and retainer in the transaxle case.
CAUTION: Align the oil holes in the low and reverse brake piston with the oil holes in the transaxle case.
7. Insert the piston into the transaxle case, and align the springs and piston pins by rotating the spring retainer.
8. Install the SST 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.
9. Compress the spring and retainer assembly.
8. Install the snap ring.
9. Remove the SST.
10. 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.
11. Measure the clearance between the transaxle case and the driven plate. 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: 1.7 - 2.1 mm (0.067 - 0.826 inch)