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# 7. Measurement of Disc Brake Drag Torque Service standards

Approx. 5 sec. after re- leasing brake pedal

9.8 N·m {7.2 ft.lbs, 1.0 kgf·m} or less

After turning disc rotor 10 revolutions

6.9 N·m {5.1 ft.lbs, 0.7 kgf·m} or less

Standard value

Maintenance item

## Drag torque of disc brake

• (tangential force at hub

bolts)

## Limit

Remedy

Inspect

Approx. 5 sec. after releasing brake pedal

After turning disc rotor 10 revolutions

Front Rear Front Rear

81 N {8.3 kgf} 83 N {8.5 kgf} 85 N {8.7 kgf} 83 N {8.5 kgf}

57 N {5.8 kgf} 59 N {6 kgf} 60 N {6.1 kgf} 59 N {6 kgf}

# Table of tangential forces

FE

## FG

• Ensure that the starting torque of the wheel hub bearings con- forms to the standard value.

• Using a spring balance, measure the tangential force at the hub bolts.

• The tangentizl force is calculated by the following formula. Tangential force = Dragging torque / (Hub bolt P.C.D. / 2)

• If the measured tangential force conforms to the specified value, this means that the drag torque of the disc brake conforms to the standard value.

• If the measured value does not conform to the specified torque, check the sliding portions of the piston and piston seal.

• 8.

Inspection of Drum Brake Lining Thickness

# CAUTION

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

# Service standards (Unit: mm {in.})

Location

## Brake lining thickness

φ320 {12.6} drum

Standard value

Limit

Remedy

4.0 {0.16}

Replace

• Remove the cover from the backing plate. Through the inspec- tion hole, check the thickness of the brake lining.

• If the measured value is equal to or less than the limit, replace all of the brake linings or shoes on the same axle.

• After the inspection, be sure to install the cover.

35A-45

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