GM4 64 o OD X P Q Q11I j d I QEQQB Q QS 4 J Q I l r 0 3 1Q 0 E m 1 G Q Q I 1 xi W Q1 Q F 1 1 T vw w S i 9 rp it l 2 Q 1 xx E 1 1 wk 1 W ao l i 1 1 gg GM4 64 1978 8 I BRAKE BOOSTER VACUUM DUAL DIAPHRAGMXMORAINE 1 RETAINER Pwr Cyl Boot 1 N S 17 DIAPHRAGM Secondary 1 2 N S 2 BOOT Pwr Cy 1 2 N S 18 PLATE Secondary Support 1 N S 3 SILENCER Air 1 2 N S 19 PISTON Pwr Brk CyI 1 3 4 922 4 BEARING Prim Pwr Piston 1 2 N S 20 RING Ext Ret 5 8 Dia Shaft 1 2 4 8 934 5 SPACER Pwr Cyl Mtg Cadillac 4 898 21 BUMPER Reaction 1 2 4 N S 6 HOUSING Rear 1 N S 22 SPRING Air Valve 1 4 N S 7 FILTER Air 1 2 4 N S 23 BODY Reaction 1 3 N S 8 RETAINER Cont VaIve 1 2 4 N S 24 RETAINER Reaction Body 1 3 4 N S 9 VALVE ASM Air 1 4 N S 25 PISTON Reaction 1 3 N S 10 SEAL O Ring 1 2 N S 26 DISC Reaction 1 2 3 N S 11 SILENCER Pwr Haad 1 2 4 N S 27 RETAINER Reaction 1 N S 12 RETAINER Diaphragm 1 2 N S 28 ROD Pwr Brk Cyl 1 4 924 13 DIAPHRAGM Primary 1 2 N S 29 SPRING Pwr Piston Ret 1 N S 14 PLATE Primary Support 1 N S 30 HOUSING Front 1 N S 15 BEARING Secondary Pwr Piston 1 31 GROMMET Check Valve Also Part of 2 N S Item 32 1 2 4 955 16 HOUSING Divider 1 N S 32 VALVE W Grommet Vac Check 1 2 4 955 33 SEAL Frt Hsg 1 2 N S NOTE 1 Part of Group 4 901 CYLINDER Vac Pwr Brk NOTE 2 Part of Group 4 898 REPAIR KIT Pwr Brk Cyl NOTE 3 Pan of Group 4 922 PISTON KIT Vac Pwr Brk NOTE 4 Part of Group 4 918 PLUNGER VALVE Pwr Brk Cyl Ti 1987 GENERAL MOTORS SERVICE PARTS OPERAT ONS OVLDSMOB LE 31A T 4 000 GROUP 4 142 7 87