PISTON RING SPRING RUBBER SPRING PISTON PRIMARY I INLET EXHAUST VALVE I DELIVERY PORT PRIMARY SUPPLY PORT IBLEED PASSAGE l LM OUTER RELAY PISTON I I RELAY p S ON I INNER RELAY PISTON RETURN SPRING V RI nr 2 L u LOWER INLET EXXHAUST SECONDARY DELIVERY 3 Z VALVE I 0Rt SECONDARY SUPPLY EEXHAUST II J PORT pORT MJ 20 Pm I 2 BOLT J I3 WASHER 21 GROMMET 4 SEAT W 5 BUMPER cu 22 SEAL 6 PISTO I N 23 PISTON 7 G MMET O E 24 cn0MMEr I 8 SPRING R gi j 25 SPRING V 26 GROMMET 9 PRIMARY PORTION 27 COVER OF VALVE BODY I 28 BOLT AND 3 V LOCK WASHERS I I IO DISC ASSY I V 2g DISC A Sy II s00Y R L I BODY 3 RETAINER I 2 RETAINER ti I I is 32 SPRING I I3 FRING g 0 ss GROMMET I4 WA HER Q C 34 SEAL I5 cIz0MMEI g ss GUIDE A IPI EAL C 36 RING I 7 RETAINER w I Q 37 SEAT I E Q sa DISC ASSY I 4BP 67 19 RING 39 RING 1967 71 SER 60 EMERGENCY AIR BRAKE CONTROL VALVE EXC TILT 1 4 640 RETAINER Cont Valve 21 4 640 GROMMET Cont Valve Piston 22 N L SEAL 2 8 900 BOLT HeIx 1 4 20 x 5 8 23 4 640 PlSTON Cont Valve Inner 3 4 640 WASHER Cont Valve Piston Relay Spring 24 4 640 GROMMET Cont Valve Piston I 4 4 640 SEAT Cont Valve Assy Seal 5 4 640 BUMPER Cont Valve Piston 25 4 640 SPR NG C0nt Valve Relay Assy Return 6 4 640 PlSTON Cont Valve 26 4 640 GROMMET Cont Valve Piston I 7 4 640 GROMMET Cont Valve Cover Piston Seal 27 4 640 COVE R Cont Valve Piston 8 4 640 SPRlNG ICont Valve Piston 28 8 931 L WASHER 5 16 Return 8 900 BOI T I lex I Id I5 16 X 7 8 9 N I BODY PART of 4 640 CONTROL 29 4 640 DISC ASSY Cont Valve ASSY Lower 10 4 640 DISC ASS Y Cont Valve 30 4 640 BODY Cont Valve Lower Upper 31 4 640 RETAlNER Cont Valve 11 4 640 BODY Ccmt Valve Lower Lower Seal 12 4 640 RETAlNER C0nt Valve 32 4 640 SPRING C0nt Valve Lower Upper Disc 33 4 640 GROMMET Cont Valve Lower 13 4 640 SPRING Cont Valve Upper Seal 14 4 640 WASHER Cont Valve Upper 34 N IL SEAL Spring 35 4 640 GU DE Cont Valve Lower 15 4 878 GROMME T Cont Valve Upper 36 8 900 RING Type T 16 N L SEAL 37 4 640 SEAT Cont Valve Exh 17 4 640 RETAINER Cont Valve Upper Check gx O Ring 38 4 640 DISC ASSY Cont Valve 18 8 934 RING Snaap Exh Check 19 8 934 RlNG Snaap 39 8 934 RING Type lnt Ret 20 4 640 PISTON ont Valve Outer Relay GIVI PARTS DIVISION GENERAL MOTORS CORPOR TlON CHEVROLET 72TM j 4 103 P 4 000 GROUP 4 L L L