Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1966CHEVY II BASE, 2D SEDAN, 3.2L ENG, NOT AVAILABLE TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESMECHANICAL - HYDRAULICPOWER BRAKE UNITS - BENDIX SINGLE DIAPHRAGMOVERHAULREASSEMBLY
1966 Chevrolet Chevy II Base, 2D Sedan, 3.2L Eng, Not Available Trans
Power Brake Units - BENDIX Single Diaphragm: Overhaul: Reassembly
1966 Chevrolet Chevy II Base, 2D Sedan, 3.2L Eng, Not Available TransSECTION Reassembly
- Install vacuum check valve grommet (beveled edge on inside), dip check valve in clean, denatured alcohol and install. Install suitable holding fixture (J-22805) on front housing. Install new rear housing seal in center hole, using suitable tool (J 22677) to seat seal in recess (tool bottoms against housing when seal is in place).
- Assemble diaphragm plate assembly as follows: Lubricate outer diameter of diaphragm plate and extension, valve, and plunger bearing surfaces, and outer edge of valve poppet. Install valve and rod into diaphragm plate extension. Depress pushrod slightly and install air valve lock (lock must index and retain air valve). Install rolling diaphragm in diaphragm plate hub groove. Lubricate reaction disc and install disc (use master cylinder push rod to seat disc in diaphragm plate bore).NOTE: If disc is not fully seated, push rod height will be incorrect.
- Lubricate inside of bearing seal and diaphragm bead contact surface of rear shell. Install diaphragm plate assembly in rear housing. Place air filter element over push rod and into diaphragm plate extension. Install filter retainer. With holding-fixture in place, position suitable wrench (J-9504) over studs on rear housing and position front and rear housings together. Press down on wrench and rotate counterclockwise (rear housing) to lock housings. Align scribe marks. Rebend tabs on rear housing (if tabs are cracked or broken, housing must be replaced) Remove wrench from housing. Install air silencers over push rod end. Install push rod boot and boot retainer. On clevis type push rods, install lock nut and push rod clevis. Lightly lubricate piston rod (except rounded end). Guide rod into center bore until fully seated against reaction disc. Install front housing seal fin same manner as rear seal). Attach master cylinder.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.