SECTION : 4E1
REAR DISC BRAKES
TABLE OF CONTENTS
SPECIFICATIONS4E1–1 . . . . . . . . . . . . . . . . . . . . . . . . .
Fastener Tightening Specifications 4E1–1. . . . . . . . . .
DIAGNOSIS4E1–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lining Inspection 4E1–1. . . . . . . . . . . . . . . . . . . . . . . . .
Rotor Inspection 4E1–1. . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE AND REPAIR4E1–3 . . . . . . . . . . . . . .
ON–VEHICLE SERVICE 4E1–3. . . . . . . . . . . . . . . . . . . .
Shoe and Lining 4E1–3. . . . . . . . . . . . . . . . . . . . . . . . . . Caliper 4E1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rotor 4E1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hub and Parking Brake Shoe/Backplate 4E1–6. . . . .
UNIT REPAIR 4E1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caliper Overhaul 4E1–10. . . . . . . . . . . . . . . . . . . . . . . .
GENERAL DESCRIPTION AND SYSTEM
OPERATION4E1–12 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disc Brake Caliper Assembly 4E1–12. . . . . . . . . . . . . .
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
ApplicationNSmLb–FtLb–In
Brake Hose Inlet Bolt and Ring Seals3224–
Caliper Mounting Bolts5641–
Lower Caliper Mounting Bolt2720–
Parking Brake Shoe Hold–Down Spring As-
sembly Screw4–35
Rotor Detent Screw4–35
Hub Bolts6548–
DIAGNOSIS
LINING INSPECTION
1. Raise and suitably support the vehicle.
2. Remove the rear wheels. Refer to Section 2E, Tires
and Wheels.
3. Visually check the brake shoe linings for minimum
thickness and wear.
4. Measure the thickness.
Important : The minimum discard thickness of the brake
shoe lining is 2 mm (0.08 inch).
5. Install the shoes in axle sets only.
6. Install the rear wheels. Refer to Section 2E, Tires
and Wheels.
7. Lower the vehicle.
ROTOR INSPECTION
Brake rotors are manufactured with close tolerances for
thickness variation, flatness, and lateral runout, but pits
and grooves are created in rotors during usage. Lack of
uniformity of the braking surfaces of the rotor can cause
inadequate braking and a pulsating pedal during braking.
The surface finish of the rotor is also important because
an unsuitable surface finish can cause pulling and rapid
wear of the brake shoe lining. If a rotor does not meet the
specification, it should be refinished to specification or re-
placed. Refinishing of the rotor should only be done with
precision equipment.
Thickness variation can be checked by measuring the
thickness of the rotor at four or more points around the cir-
cumference of the rotor. All measurements must be made
at the same distance from the edge of the rotor. A rotor that
varies by more than. 1.0 mm (0.04 inch) can cause pedal
