Remove and discard the servo piston seal ring (Fig.
304). Then clean the servo components with solvent and dry with compressed air. Replace either spring if collapsed, distorted or broken. Replace the plug and piston if cracked, bent, or worn. Discard the servo snap rings and use a new ones at assembly.
Fig. 304 Rear Servo Components
1 - SNAP RING
2 - PISTON SEAL
3 - PISTON PLUG
4 - SPRING RETAINER
5 - SNAP RING
6 - PISTON SPRING
7 - CUSHION SPRING
8 - PISTON