Wheel Cylinder Repair

GENERAL INFORMATION

Wheel Cylinder.

301. DUST BOOT.

302. PISTON.

303. SEAL.

304. EXPANDER SPRING.

305. VALVE CAP.

306. BLEEDER VALVE.

307. WHEEL CYLINDER

Disassembly

PROCEDURE.

1. Remove wheel cylinder 307 from the backing plate..

2. Dust boots

301..

3. Pistons 302 and seals

303..

4. Expander spring

304..

5. Valve cap 305 and bleeder valve 306..

Inspection

PROCEDURE.

1. Inspect the wheel cylinder bore and pistons 302 for

– scratches.

– dents.

– signs of corrosion.

– signs of wear..

2. Remove light corrosion from the cylinder bore with a soft lint-free cloth. If the corrosion cannot be removed, replace the wheel cylinder..

Clean.

PROCEDURE.

1. Wash all parts with alcohol or fresh brake fluid..

2. Dry the parts with a stream of oil-free compressed air..

3. Before assembly, lubricate the cylinder bore, pistons, and seals with fresh brake fluid..

Assembly.

Warning.

Before assembly, apply a thin layer of brake cylinder paste to the cylinder bore

and all new rubber parts (except dust boots)..

PROCEDURE.

1. Screw in bleeder valve 306 and install the cap

305..

2. Install the spring

304..

3. Seals 303 and pistons

302..

4. Dust boots

301..

5. Check that pistons 302 move freely in the cylinder..

6. Secure the wheel cylinder to the brake backing plate

4.