Chrysler 300M Service Manual page 131

5 - 24 BRAKES - BASE BRAKE SYSTEM
DISC BRAKE CALIPER - FRONT (Continued)
(7) Clean the piston bore and drilled passage ways
using alcohol or a suitable solvent. Wipe it dry using
only a lint-free cloth.
(8) Inspect the piston bore for scoring or pitting.
Bores that show light scratches or corrosion can usu-
ally be cleared of the light scratches or corrosion
using crocus cloth. Bores that have deep scratches or
scoring should be honed. Use Caliper Hone, Special
Tool C-4095 or equivalent, to hone the bore. Do not
over-hone the bore. Don not increase the diameter of
the bore more than 0.0254 mm (0.001 inch) (Fig. 31).
If the bore does not clean up within this specifica-
tion, a new caliper housing should be installed.
Fig. 31 Honing Brake Caliper Piston Bore
1 - CALIPER
2 - CALIPER BORE
3 - SPECIAL TOOL C-4095
NOTE: During the honing procedure, coat the
stones and bore with brake fluid. After honing the
bore, carefully clean the seal and boot grooves with
a stiff non-metallic rotary brush. Use extreme care
in cleaning the caliper after honing. Remove all dirt
and grit by flushing the caliper bore with fresh
clean brake fluid; wipe it dry with a clean, lint free
cloth and then clean it a second time.
(9) Inspect the caliper piston for pitting, scratches,
or any physical damage. Replace the piston if there is
evidence of scratches, pitting or physical damage.
CLEANING - CALIPER
WARNING: DUST AND DIRT ACCUMULATING ON
BRAKE PARTS DURING NORMAL USE MAY CON-
TAIN ASBESTOS FIBERS FROM PRODUCTION OR
AFTERMARKET BRAKE
EXCESSIVE CONCENTRATIONS
FIBERS CAN CAUSE SERIOUS BODILY HARM.
EXERCISE CARE
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.
To clean or flush the internal passages of the brake
caliper, use fresh brake fluid or Mopar Non-Chlori-
nated Brake Parts Cleaner. Never use gasoline, ker-
osene, alcohol, oil, transmission fluid or any fluid
containing mineral oil to clean the caliper. These flu-
ids will damage rubber cups and seals.
INSPECTION - CALIPER
Inspect the disc brake caliper for the following:
• Brake fluid leaks in and around boot area and
inboard lining
• Ruptures, brittleness or damage to the piston
dust boot
• Damaged, dry or brittle guide pin dust boots
If caliper fails inspection, disassemble and recondi-
tion caliper, replacing the seals and dust boots.
LININGS. BREATHING
OF ASBESTOS
WHEN SERVICING
LH
BRAKE