Brake Booster - Tandem Diaphragm: Disassembly
- Remove pushrod boot, silencer, front housing seal, grommet and vacuum check valve.
- Scribe a mark on front and rear housings for reassembly reference. Scribe and unstake staked tabs. Install booster in Holding Fixture (J-23456). See Fig 1
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Courtesy of GENERAL MOTORS CORP.
- Tighten fixture handscrew just enough to allow for housing rotation. Turn fixture handle counter-clockwise until tabs on front housing are moved to unlocked position. Carefully separate housings. Remove power piston group, power piston return spring, and power piston bearing.
- Remove push rod, reaction retainer and power head silencer. Grasp assembly at outside edge of divider and diaphragms. Hold with push rod down against a hard surface.
- Use a slight force or impact to dislodge diaphragm retainer. Remove primary diaphragm, primary support plate and secondary power piston bearing. Remove housing divider, secondary support plate and diaphragm and power piston assembly.