CLEANING
WARNING: DUST AND DIRT ACCUMULATING ON
BRAKE PARTS DURING NORMAL USE MAY CON-
TAIN ASBESTOS FIBERS FROM PRODUCTION OR
AFTERMARKET
BRAKE
LININGS.
BREATHING
EXCESSIVE
CONCENTRATIONS
OF
ASBESTOS
FIBERS CAN CAUSE SERIOUS BODILY HARM.
EXERCISE
CARE
WHEN
SERVICING
BRAKE
PARTS. DO NOT SAND OR GRIND BRAKE LINING
UNLESS EQUIPMENT USED IS DESIGNED TO CON-
TAIN THE DUST RESIDUE. DO NOT CLEAN BRAKE
PARTS
WITH
COMPRESSED AIR
OR
BY DRY
BRUSHING. CLEANING SHOULD BE DONE BY
DAMPENING THE BRAKE COMPONENTS WITH A
FINE MIST OF WATER, THEN WIPING THE BRAKE
COMPONENTS CLEAN WITH A DAMPENED CLOTH.
DISPOSE OF CLOTH AND ALL RESIDUE CONTAIN-
ING ASBESTOS FIBERS IN AN IMPERMEABLE
CONTAINER WITH THE APPROPRIATE LABEL. FOL-
LOW PRACTICES PRESCRIBED BY THE OCCUPA-
TIONAL SAFETY AND HEALTH ADMINISTRATION
(OSHA) AND THE ENVIRONMENTAL PROTECTION
AGENCY (EPA) FOR THE HANDLING, PROCESSING,
AND DISPOSING OF DUST OR DEBRIS THAT MAY
CONTAIN ASBESTOS FIBERS.
INSPECTION
Visually inspect the condition of the brake shoe lin-
ings (friction material) on the brake shoes through
the caliper. If a more in-depth inspection needs to be
made, removal of the brake shoes will be necessary.
(Refer to 5 - BRAKES/HYDRAULIC/MECHANICAL/
BRAKE PADS/SHOES - REMOVAL).
The brake shoe friction material thickness is to be
measured at the thinnest point of the friction mate-
rial.
The minimum front brake shoe assembly friction
material thickness (Fig. 13) is 2.5 mm (.100 in.).
When the brake shoe friction material reaches the
minimum thickness, the front brake shoes must be
replaced.
NOTE: When the brake shoes are replaced, only
brake shoes meeting the Original Equipment Manu-
facturer material formulation should be used. This
is required to maintain the original braking perfor-
mance of this vehicle.
Replace both brake shoes (inboard and outboard)
on both front or both rear wheels of the vehicle
whenever the brake shoes on either side of the vehi-
cle require replacement.
If the brake shoes do not require replacement,
install the original brake shoes back on the vehicle.
Make sure each brake shoe is returned to its original
position on the same wheel of the vehicle it was
removed from.
Fig. 12 Disc Brake Caliper Inspection
1 - PISTONS (4)
2 - DUST BOOTS (4)
3 - DISC BRAKE CALIPER ASSEMBLY
4 - BRAKE SHOE SUPPORTS (4)
5 - BRAKE ROTOR
Fig. 13 Brake Shoe Friction Material Thickness
Measurement
1 - BRAKE SHOE ASSEMBLY FRICTION MATERIAL THICKNESS
IS TO BE MEASURED AT THE THINNEST POINT.
2 - BRAKE SHOE ASSEMBLY FRICTION MATERIAL
3 - BRAKE SHOE ASSEMBLY BACKING PLATE
5 - 14
BRAKES - BASE
ZB
BRAKE PADS/SHOES - FRONT/REAR (Continued)