TM  10-3930-643-34 GENERAL  SUPPORT  BRAKE  MAINTENANCE.  (cont) 17-1. Power Cluster (S/N 2000 and below and 2904 and above). (Sheet 5 of 7) CLEANING/INSPECTION   (cont) 18. Inspect  master  cylinder (2) for cracks,  blocked  bores, leakage or damaged  threads. NOTE Replace  master  cylinder  if hydraulic fluid was present in boot at disassembly. 19. Inspect all parts. Refer to para- graph 2-9. ASSEMBLY 20. 21. 22. 23. 24. Soak new retainer (19) in clean hydraulic  fluid. Install new cup (20) and new retainer (19) on piston assembly (21). Coat inside of shell (18) with clean hydraulic fluid and install piston assembly (21) in shell (18). Install boot (17) in head (15). Install spring (16) on shaft of piston assembly (21). Go to sheet 6 17-6

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