2-4 Brake Band
2-4 BRAKE BANDPreparation
SST
Disassembly / Inspection / Assembly
1. Disassemble in the order shown in the figure.
2. Assemble in the reverse order of disassembly, referring to Assembly procedure.
2-4 Brake Band:
Inspection
Servo return spring
1. Measure the return spring free length and check for deformation.
Free length: 43.25 mm (1.703 in)
2. If not within specification, replace the return spring.
2-4 brake band
Note: Use a piece of wire to secure the 2-4 brake band so that it is not damaged by being stretched.
Check the 2-4 brake band for wear and burning.
Orifice check spring
Note: Do not compress the spring when measuring it with vernier calipers.
1. Measure the spring free length.
Specification
2. If not as specified, replace the spring.
Assembly procedure
Caution: Install the spring exactly in the direction shown.
1. Install the orifice valve, orifice check spring, and orifice holder as shown.
2. Install the orifice assembly and washer to the transaxle case.
3. Tighten the orifice assembly by using a hexagonal wrench.
Tightening torque:
40 - 53 Nm (4.0 - 5.5 kgf-m, 29 - 39 ft-lbf)
4. Apply ATF to new D-rings and install them to the servo piston.
D-ring inner diameter
Piston stem side: 58.5 mm (2.303 in)
Servo retainer side:
29.4 mm (1.157 in) (B6, Z5)
25.5 mm (1.004 in) (BP)
5. Insert the piston stem into the servo piston and secure it with a new spring clip.
6. Apply ATF to the new O-ring and install it to the servo retainer.
O-ring inner diameter: 65.7 mm (2.587 in)
7. Assemble the servo piston and servo retainer.
8. Install the snap ring.
Adjustment without SST
1. Mark the piston stem as shown at the point it exits the transaxle case.
Note: Measure several times and calculate the average value.
2. Apply compressed air through the fluid passage with a rubber-tipped air nozzle as shown and measure the piston stem stroke.
Air pressure: 392 kPa (4.0 kgf/cm2, 57 psi) max.
Stroke: 1.0 - 1.7 mm (0.0394 - 0.0669 in )
3. If not within specification adjust it by selecting the proper piston stem from below.
Adjustment with SST
Caution: Do not deform the snap ring when removing it.
1. Remove the snap ring and remove the 2-4 band servo assembly.
2. Install the servo piston to the SST
3. Apply ATF to the O-ring removed from the servo retainer.
4. Install the O-ring to the SST
5. Install the band servo assembly and SST into the transaxle case and secure it with the snap ring.
6. Set a dial indicator against the piston stem.
7. Apply compressed air through the fluid passage -with a rubber-tipped air nozzle as shown and measure the piston stem stroke.
Air pressure: 392 kPa (4.0 kgf/cm2, 57 psi) max.
Stroke: 1.0 - 1.7 mm (0.0394 - 0.0669 in)
8. If not within specification, adjust it by selecting the proper piston stem from below.
Piston stem length
9. Remove the band servo assembly and remove the SST. Reinstall the servo retainer.
10. Replace the O-rings with new ones.
11. Install the band servo assembly into the transaxle case and secure it with the snap ring.