Band Servo Piston Assembly

Band Servo Piston Assembly:

DISASSEMBLY




1. Remove band servo piston fixing bolts.




2. Apply compressed air to oil hole in transmission case to remove OD servo piston retainer and band servo piston assembly.
- Hold band servo piston assembly with a rag or nylon waste.




3. Apply compressed air to oil hole in OD servo piston retainer to remove OD servo piston from retainer.
- Hold OD servo piston while applying compressed air.




4. Remove D-ring from OD servo piston.




5. Remove O-rings from OD servo piston retainer.




6. Remove band servo piston assembly from servo piston retainer by pushing it forward.




7. Place piston stem end on a wooden block. While pushing servo piston spring retainer down, remove E-ring.




8. Remove OD servo return spring, band servo thrust washer and band servo piston stem from band servo piston.




9. Remove O-rings from servo piston retainer.




10. Remove D-rings from band servo piston.

INSPECTION

Pistons, retainers and piston stem
- Check frictional surfaces for abnormal wear or damage.

Return springs




- Check for deformation or damage.
- Measure free length and outer diameter.
Inspection standard: Refer to Specifications. [1][2]Mechanical Specifications

ASSEMBLY




1. Install D-rings to servo piston retainer.
- Apply ATF to D-rings.
- Pay attention to position of each O-ring.




2. Install band servo piston stem, band servo thrust washer, OD servo return spring and spring retainer to band servo piston.




3. Place piston stem end on a wooden block. While pushing servo piston spring retainer down, install E-ring.




4. Install O-rings to servo piston retainer.
- Apply ATF to O-rings.
- Pay attention to position of each O-ring.




5. Install band servo piston assembly to servo piston retainer by pushing it inward.




6. Install D-ring to OD servo piston.
- Apply ATF to D-ring.




7. Install O-rings to OD servo piston retainer.
- Apply ATF to O-rings.
- Pay attention to position of each O-ring.




8. Install OD servo piston to OD servo piston retainer.




9. Install band servo piston assembly and 2nd servo return spring to transmission case.
- Apply ATF to O-ring of band servo piston and transmission case.




10. Install OD servo piston assembly to transmission case.
- Apply ATF to O-ring of band servo piston and transmission case.




11. Install band servo piston snap ring to transmission case.