Rear Brake Drum and Shoe Inspection

Rear Brake Drum and Shoe Inspection

Rear Brake Drum Removal and Installation:Drum

Brake Drum

Inspect brake drum for wear.

If drum inner diameter is exceeds the limit or uneven or stepped wear is excessive, replace the drum.

Rear brake drum inner diameter
"a"
Standard: 220 mm (8.66 in.)
Limit: 222 mm (8.74 in.)






Cracked, Scored or Grooved Drum

A cracked drum is unsafe for further service and must be replaced. Do not attempt to weld a cracked drum.

Smooth up any slight scores. Heavy or extensive scoring will cause excessive brake lining wear and it will probably be necessary to resurface drum braking surface.

If brake linings are slightly worn and drum is grooved, drum should be polished with fine emery cloth in the direction of drum depth but not circumferentially along drum inner.

NOTE:

When drum is removed, visually inspect wheel cylinder for brake fluid leakage. Correct leaky point, if any.

Brake Shoe

NOTE:

If the brake shoe lining is polished with sandpaper, abrading particles will be embedded in the lining and will damage the brake drum.

Do not polish a rough shoe lining with sandpaper. Replace the shoe with a new one.

Measure thickness of brake shoe (1). Also, check surface of lining for hardening, excessive wear.

If necessary, replace new brake shoes.

Rear brake shoe lining thickness
"a"
Standard: 4.0 mm (0.157 in.)
Limit: 1.0 mm (0.04 in.)