Band Servo Piston Assembly

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.

RETURN SPRINGS





^ Check for deformation or damage. Measure free length and outer diameter.
Inspection standard: Refer to Specifications.

Assembly





1. Install O-rings onto servo piston retainer.
^ Apply ATF 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 ATF 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 ATF to D-ring.





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