Band Servo Piston Assembly

COMPONENTS

DISASSEMBLY




1. Block one oil hole in O.D. servo piston retainer and the center hole in O.D. band servo piston.
2. Apply compressed air to the other oil hole in piston retainer to remove O.D. band servo piston from retainer.
3. Remove D-ring from O.D. band servo piston.




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




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




6. Remove servo piston spring retainer, return spring C and piston stem from band servo piston.




7. Remove E-ring from band servo piston.




8. Remove servo cushion spring retainer from band servo piston.
9. Remove D-rings from band servo piston.
10. Remove O-rings from servo piston retainer.

INSPECTION




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

Inspection Standard:

Return springs
- Check for deformation or damage. Measure free length and outer diameter.

ASSEMBLY




1. Install O-rings onto servo piston retainer.
- Apply A.T.F. to O-rings.
- Pay attention to position of each O-ring.




2. Install servo cushion spring retainer onto band servo piston.




3. Install E-ring onto servo cushion spring retainer.




4. Install D-rings onto band servo piston.
- Apply A.T.F. to D-rings.




5. Install servo piston spring retainer, return spring C and piston stem onto band servo piston.




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




7. install band servo piston assembly onto servo piston retainer by pushing it inward.




8. Install D-ring on O.D. band servo piston.
- Apply A.T.F. to D-ring.




9. Install O.D. band servo piston onto servo piston retainer by pushing it inward.