Accumulator. Front servo

Accumulator

Inspect the accumulator piston and seal rings (Fig.

303). Replace the seal rings if worn or cut. Replace the piston if chipped or cracked.

Check condition of the accumulator inner and outer springs (Fig. 303). Replace the springs if the coils are cracked, distorted or collapsed.

Fig. 303 Accumulator Components

1 - INNER SPRING

2 - ACCUMULATOR PISTON

3 - OUTER SPRING

4 - SEAL RINGS

Front servo

Clean the servo piston components with solvent and dry them with compressed air. Wipe the band clean with lint free shop towels.

Replace the front band if distorted, lining is burned, flaking off, or worn to the point where the grooves in the lining material are no longer visible.

Inspect the servo components. Replace the springs if collapsed, distorted or broken. Replace the guide, rod and piston if cracked, bent, or worn. Discard the servo snap ring if distorted or warped.

Check the servo piston bore for wear. If the bore is severely scored, or damaged, it will be necessary to replace the case.

Replace any servo component if doubt exists about condition. Do not reuse suspect parts.