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ON-VEHICLE INSPECTION AND ADJUSTMENT

9. Initial Setting of Clearance between Brake Drum and Shoe CAUTION

  • To ensure correct operation of the brakes, be sure to inspect both shoes on each wheel.

Standard value

Limit

Remedy

0.2 {0.0079}

Inspect, and ad-

just as required

Service standards (Unit: mm {in.})

Location

Maintenance item

  • Clearance between brake drum and shoe

[Inspection]

  • Cycle the brake pedal a couple of times to bring the brake shoes to conditions appropriate for the inspection.

  • Through the inspection hole, insert a thickness gauge between the brake drum and lining. The gauge should be able to be in- serted and out with slight resistance.

  • If the clearance does not conform to the standard value, perform the following adjustment.

[Adjustment]

  • Jack up the wheel being adjusted. Ensure that the wheel hub bearings are not loose.

  • With a 0.3 mm {0.012 in.} thickness gauge inserted through the inspection hole, adjust the drum-to-lining clearance in the follow- ing manners such that the gauge can be inserted and out with slight resistance.

  • If the thickness gauge can be inserted and out with no resis- tance, turn the adjuster through the inspection hole in the direc- tion of the arrow on the backing plate.

  • If the clearance is too small to insert the thickness gauge or there is considerable resistance when inserting the gauge, re- move the cover and insert a φ2 mm {0.079 in.} wire through the hole to lift the adjust lever for the wheel cylinder. Then, through the inspection hole turn the adjuster in the direction opposite to the arrow on the backing plate to increase the clearance be- tween the brake drum and shoe.

  • Then, cycle the brake pedal a couple of times. This will auto- matically bring the brake drum-to-shoe clearance to 0.2 mm

    • {0.0079

      in.}.

  • Insert a 0.2 mm {0.0079 in.} thickness gauge between the brake drum and lining. It should be able to be inserted and out with slight resistance.

  • Check the disc brake for normal operation. If faulty, disassem- ble and inspect the wheel cylinders.

35A-46

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