Drum; Diagnosis And Testing - Brake Drum; Out-Of-Round; Runout - Chrysler Sebring 2004 Service Manual

JR
DISC BRAKE CALIPER - REAR (Continued)
(4) Carefully lower caliper and brake shoes over
rotor reversing the removal procedure (Fig. 33).
Make sure that the caliper guide pin bolts, bushings
and sleeves are clear of the adapter bosses.
CAUTION: Extreme caution should be taken not to
cross thread the caliper guide pin bolts when they
are installed.
(5) Install the caliper guide pin bolts (Fig. 32).
Tighten the caliper guide pin bolts to a torque of 22
N·m (192 in. lbs.).
(6) Install the brake hose on the caliper. To do
this, first place one NEW special fitting washer on
each side of the hose fitting, then slide the banjo bolt
through the fitting. Next, thread the banjo bolt into
the threaded port on the rear of the brake caliper.
Tighten the banjo bolt to a torque of 35 N·m (26 ft.
lbs.).
(7) Install wheels and tire assembly.
(8) Tighten the wheel mounting stud nuts in
proper sequence until all nuts are torqued to half
specification. Then repeat the tightening sequence to
the full specified torque of 135 N·m (100 ft. lbs.).
(9) Lower vehicle.
(10) Remove the brake pedal depressor (holding)
tool.
(11) Bleed the hydraulic brake circuit to the brake
caliper. (Refer to 5 - BRAKES - STANDARD PROCE-
DURE)
(12) Road test the vehicle and make several stops
to wear off any foreign material on the brakes and to
seat the brake pads.

DRUM

DIAGNOSIS AND TESTING - BRAKE DRUM

OUT-OF-ROUND

A brake drum whose braking surface is out-of-
round can cause vehicle vibration and brake pedal
pulsation upon braking. To measure brake drum out-
of-round, perform the following:
(1) Remove the drum from the vehicle.
(2) Using a brake drum micrometer, measure the
inside diameter at several points around the inside of
the drum on the machined surface. Record the mea-
surements.
Drum braking surface out-of-round must not
exceed 0.050 mm (0.002 inch). If the measurement is
not within specification, reface or replace the drum.
(Refer to 5 - BRAKES/HYDRAULIC/MECHANICAL/
DRUM - STANDARD PROCEDURE). Always replace
the drum if machining will cause the diameter to
exceed drum maximum diameter. All brake drums
are marked with the maximum allowable brake
drum diameter (Fig. 40).

RUNOUT

A runout measurement can be done along with the
out-of-round measurement.
(1) Mount the drum on an off-vehicle brake lathe
following the manufacturers instructions.
(2) Mount a dial indicator on the lathe and posi-
tion the indicator needle against center of the brake
drum machined surface.
(3) Slowly rotate the drum by hand recording
high and low indicator readings through a 360° rota-
tion.
Drum braking surface runout must not exceed
0.050 mm (0.002 inch). If the measurement is not
within specification, reface or replace the drum.
(Refer to 5 - BRAKES/HYDRAULIC/MECHANICAL/
DRUM - STANDARD PROCEDURE). Always replace
the drum if machining will cause the diameter to
exceed drum maximum diameter. All brake drums
are marked with the maximum allowable brake
drum diameter (Fig. 40).
STANDARD PROCEDURE - BRAKE DRUM
MACHINING
If a brake drum is deeply scored or warped, it can
be machined on a brake lathe equipped to machine
brake drums. Follow the manufacturers instructions
on the machining procedure.
Measure the brake drum inside diameter before
machining. If machining the drum will cause the
drum to exceed maximum allowable diameter, do not
machine the brake drum. It needs to be replaced.
CAUTION: Do not machine the brake drum if it will
cause the drum to exceed maximum allowable
diameter.
All brake drums are marked with the maximum
allowable brake drum inside diameter (Fig. 40).
When machining, make sure the final finish feed
cut is set to fine in order to avoid a screw effect on
the brake shoes when the brakes are applied. This
final feed cut specification varies from lathe manu-
facturer to lathe manufacturer.
REMOVAL
NOTE: Before proceeding, (Refer to 5 - BRAKES -
WARNING)(Refer to 5 - BRAKES - CAUTION).
(1) Raise vehicle. (Refer to LUBRICATION &
MAINTENANCE/HOISTING - STANDARD PROCE-
DURE)
(2) Remove rear tire and wheel assembly.
BRAKES - BASE 5 - 23