T4B 53 0 Q QI J 9 ii o 0 R G W I i i J x J K I 8 G g Q I 0 Q Q I NQ A El G e Q 0 O T a i wo Qi 3 5 0 m G Q T4B 53 1979 84 CG W JB 3 SINGLE DIAPHRAGM VACUUM CYLINDER MORAINE I BAIL Resvr Cup 4 4 4 651 20 ROD W Seal Vac Pwr Brk Cyl Return 4 924 2 COVER Rewr 4 651 21 RETAINER Reaction Z N S 3 DIAPHRAGM KIT Resvr Also Pan of 22 PLATE Reaction Lever 2 N S 4 649 Repair Kit 4 851 23 LEVER Reaeti n 2 N S 4 SCREW Cyl Stop 1 N S 24 SPRING Air Valve 2 N S 5 BODY M 4 yI 1 N S 25 VALVE Air Part ol 4 898 Repair Kit N S 6 INSERT Tube Seat 1 N S 26 BUMPER Reaction 2 N S 1 SPRING secondary Piszon 1 Ns 27 RETAINER Air Valve spring 2 Ns 8 RETAINER Secondary Piston Spring 28 RING Snap 2 N S 1 N S 29 PISTON Power 4 922 9 SEAL Primary Part of 4 649 Repair 30 SILENCER Air Part 014 898 Repair Kit N S Kit N S 10 PROTECTOR Seal Part of 4 649 31 SUPPORT Diaphragin Z N S Repair Klt N S 32 DIAPHRAGM Pwr Piston Part of I1 PISTON Saoondary 4 663 4 898 Repair Kit N S 12 SEAL Secondary Part of 4 649 Repair 33 SEAL 0 Ring Part of 4 898 Repair Kit N S Kit N S 13 PISTON ASM Primary Part ol 4 649 34 ROD Push Part of 4 998 Repair Kit N S Repair Klt N S 35 RETAINER VaIve 2 N S 14 RETAINER Pist0n I N S 36 WASHER Push Rod Limiter 2 N S 15 VALVE W Grommet Vac Chk Also 31 SLINCER Pwr Head Part ot 4 898 Part of 4 898 Repair Kit 4 955 Repair Kit N S 16 SEAL Front Hsg Part 014 898 Repair 38 SHELL ASM Z N S Kit N S 39 BEARING Pwr Piston Part of 4 898 17 SHELL ASM Z N S Repair Kit N S 1B SPRING Pwr Piston Return 2 N S 4 BOOT CyIinder 2 N S 19 RING Pwr Piston Look Part of 4 898 Repair Kit N S NOTE 1 Serviced only as pan of replacement Cylinden Brake Maszen Group 4 650 NOTE 2 Serviced only as pan oi repalcement Cylinder Vacuum Power Brake Booster Group 4 901 WAREHOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS CORPORATION I T TRUCK 52A 4 000 GROUP 4 ws 1 84