BENDIX/DELCO-Moraine Dual Piston Master Cylinder: Overhaul: Reassembly
- Put check valve spring in drum brake outlet.CAUTION: Check valve in disc brake outlet will cause disc brakes to lock up.
Put check valve on top of spring and insert tube seat in outlet against valve. Use a spare tube nut, and screw nut into outlet to bottom tube seat. Remove nut and inspect for burrs or shavings caused by installing seat.
- Install new secondary cups on rear of front (secondary) piston, with cup lips facing away from each other. Some front pistons use a cup in the rear grooves and an "O" ring in the second groove from the rear, with the cup lip facing forward and back of cup against protector washer.NOTE: Protector washer may be permanently attached to cup.
- If it is necessary to disassemble rear (primary) piston for replacement of parts see "Primary Piston Assembly" illustration.
- Coat bore of cylinder and all cups with brake fluid, then put spring retainer on end of front spring and put spring on end of front piston so that retainer is seated inside cup. Hold open end of cylinder down and push front spring and piston up into bore until spring seats against end of cylinder.
- Hold cylinder with open end up and insert rear piston assembly, spring end first, into master cylinder. Install lock ring in groove, or screw and retainer, if used. Push rear piston into bore and install stop screw and "O" ring, if used.CAUTION: Stop screw is a special screw. Do not substitute with any other type.CAUTION: On all Cadillac models except Seville, there is no stop screw installed even though a drilled and tapped hole may be provided. If a stop screw is installed, damage to master cylinder piston or seal will result.
- Install master cylinder cover and gasket with beaded side of gasket facing cylinder casting. On manual brake systems, assemble pushrod through retainer, if used, and push retainer over end of master cylinder. Install new boot over pushrod and press boot down over pushrod retainer.TIGHTENING SPECIFICATIONS
Application Ft. Lbs. American Motors Master Cylinder-to-Firewall 20-35 Master Cylinder-to-Power Unit 20-35 Brake Line-to-Master Cylinder 10-15 Chrysler Corp. Master Cylinder-to-Firewall 17 Master Cylinder-to-Power Unit 7-17 Brake Line-to-Master Cylinder 3/8-7/16" 7-13 1/2-9/16" 10-15 Ford Motor Co. Master Cylinder-to-Firewall 13-25 Master Cylinder-to-Power Unit 13-25 Brake Line-to-Master Cylinder 3/8-7/16" 10-15 1/2-9/16" 10-17 General Motors Master Cylinder-to-Firewall 24 Master Cylinder-to-Power Unit 24 Brake Line-to-Master Cylinder 14