BRAKES 5 5 4 5 6 17 QQ 1 2 1 Q 7 7 g J r 1 Q 1 Q 4 1 1 1 8 3 lt 7 9 g H 10 xi 12 Q 13 14 15 16 Q 17 18 19 Q Q 20 r 1 2 22 23 24 Fig 6 I ain Cy1inder E p1oded View 1 Spring 7 Stop Screw 13 Primary Piston 19 Spring Retainer 2 Check Valve 8 Body 14 Seal 20 Seal 3 Valve Seat 9 Spring 15 Seal 21 Seal Protector 4 Bail Wire 10 Retainer 16 Piston Extension Screw 22 Secondary Piston 5 Cover 11 Seal 17 Secondary Piston Stop 23 Seal 6 Diaphragm 12 Sea Protector 18 Spring 24 Retaining Ring 7 Tap out both seats using 1 4 x 20 tap 11 Remove the primary seal primary seal protector 8 Install a spare brake line tube nut in the outlet hole and secondary seals from the secondary piston Re Place a flat washer on a one inch screw threaded to move the piston extension screw securing the pri screw into tapped hole and thread screw into mary piston spring to the primary piston Remove threaded hole in tube seat Hold the screw to keep it the spring retainer primary seal primary seal from turning and back out the tube nut This will re protector and secondary seal from the primary move the tube seat piston 9 Repeat Step 8 above on second tube seat 10 Remove the check valves and springs from the cav Cleaning and Inspection ities beneath the tube seats 1 Remove main cylinder casting from vise and inspect CORVAIR SHOP MANUAL SUPPLEMENT