BRAKES 50 60 65 4 646 SCREW RELAY VALVE 4 3600 4 9430677 Assy 2492187 4 Piston Cover I 18 x 1 Hex 30OM Steel Repl 9417951 2 709659 Assy 2492187 4444 2902l6 Exh Valve Cover 10 24 x 2 Cross Recess Pan Hd Mach 1 2494718 Assy 2492187 4 Z43975 Piston Adj 4 646 SPRING RELAY VALVE PISTON 4 3627 1 1 2494716 Assy 717892 2492187 243971 Return 4 646 SPRING RELAY VALVE INLET EXHAUST VALVE 4 3634 1 2494712 Assy 2492187 243965 Return 4 648 PLATE MASTER CYLINDER MOUNTING 4 1164 1 1 1 691812 CD CE CG CM CS Std LH Side at Fire Wall 1 1 692013 ME Std LH Side at Fire Wall 1 1 1 704431 CD CE CG CM CS w Cab w Hyd Brake Cyl 1 1 704407 CE CS w Cowl w Hyd Brake Cyl 1 692013 ME W Hyd Brake Cyl 4 649 KIT REPAIR MASTER CYLINDER 4 1055 1 1 1 2621562 Assy 2622211 5472159 Incl Diaphragm Gasket Primary Piston Retainer and SeaIs SOA 1 3910003 Assy 3900145 FC 59000 IncI Cups Piston Ring Valve 1 1 1 3912376 Assy 3900146 FC 59012 nc Cups Piston Ring Spring 1 3887014 Assy 3900147 2064148 FC 46459 IncI Cups Piston Ring Spring 1 1 3912368 Assy 3900148 FC 59013 ncI Cups Piston Ring Spring 1 1 1 3979493 Assy 685223 FC 71605 1 1 2054811 Asm 2035459 J 22309OB lncls Cups Piston Rings Seals Spring SOA 1 1 1 2064120 Asm 2061659 2231207 lncls Caps Piston Ring Spring 4 650 CYLINDER MASTER 4 1050 NOTE See Group 0 775 5 1700 For Clutch and Brake Master Cylinder 1 3900145 CE CS FE 57597 Wagner EIect 1 4 Dia Std Bo t 16 x 1 s Hex Not Used w Dual Brake System w Out Vac Cyl 1973 1 1 1 2061659 CD CE CG CM CS 2231189 Bendix 1 1 Dia Std Not Used w Dual Brake System W Vac Cyl 1 Eff w 1974 When Replacing 3900146 1 2061131 Tube 1 2059886 Rod Must Be Used Also Lines May Have To Be Rerouted Rep 3900146 1 1 1 2035459 CE CS TE Bendix W Cab W Dual Brake System W Hyd Cy Eff w 1974 Master Cylinder is Shorter than Replaced Number and may Require Rework of Connecting Tubes Stroke Pedal Travel will also be Shorter Rep 5472159 1 1 5472393 CE W Hyd Cy W Hyd Spring Parking Brk EH w 1978 SOA 1 1 1 685223 CE CG CM CS SE SG SM SS FF 72750 W Dual Brake System Prior to 1976 M 2nd Design on SEGO Models 1 2064148 CE CS CM CY FE 100559 Wagner Elect 1 4 Dia Heavy Duty Rep 3900147 1 1 2087885 CE ME Z FE 100558 Wagner E ect 1 Dia Not Used w Hyd Cy Eff w 1978 Repl 3900148 DetaiIs C Not Available at time of Publication 4 650 BOLT MOUNTING MASTER CYLINDER 4 1062 AR AR AR 454906 CD CE CG CM CS ME TE TG TM To Dash Pane 16 x 1 1 Hex 300M Steel Repl 9421235 AR AR 9425098 CE CS SE SS w Cowl w Dual Brake System 16 x 1 Hex 3OOM Steel Repl 9419054 AR AR 3997232 SE SG SM SS W Dual Brake System W Cowl 2 2 9421235 SE W Dual Brake System w Hyd Cyl W CowI 16 x 1 4 Hex 300M SteeI Eff w 1976 2nd Design 2 9421483 SE At Main Cyl Pwr Head 197B 2nd Design 4 650 GASKET MASTER CYLINDER MOUNTING 4 1127 1 1 1 674923 CD CE CG CM CS CY ME Cyl to Dash w Cyl 3900145 6 7 8 w Cab 4 650 STUD MASTER CYLINDER 4 1240 D 2 2 2 18000453 CE CS SE TE W Hyd Cyl 24 Thd One End 16 Thd Other End 2 02 Lg Eff w 1976 2nd Design WAREHOUSING AND DISTRIBUTION DIVISION 0F GENERAL MOTORS CORPORATION 78TM 4 646 4 650 4 118 N S reference only Added this issue AR PART