(5) 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 the equivalent to hone the bore. Do
not over-hone the bore. Don not increase the diame-
ter of the bore more than 0.0254 mm (0.001 inch)
(Fig. 52). If the bore does not clean up within this
specification,
a
new
caliper
housing
should
be
installed.
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.
(6) Inspect the caliper piston for pitting, scratches,
or any physical damage. Replace the piston if there is
evidence of scratches, pitting or physical damage.
Fig. 50 Removing Caliper/Piston Dust Boot
1 - CALIPER
2 - SCREWDRIVER
3 - BOOT
Fig. 51 Removing Piston Seal
1 - PLASTIC TRIM STICK
2 - CALIPER
3 - PISTON SEAL GROOVE
4 - PISTON SEAL
Fig. 52 Honing Brake Caliper Piston Bore
1 - CALIPER
2 - CALIPER BORE
3 - SPECIAL TOOL C-4095
5 - 30
BRAKES - BASE
PL/SRT-4
DISC BRAKE CALIPER - FRONT (Continued)