Chrysler Le Baron, Dodge Dynasty, Plymouth Acclaim. Manual — part 224
tool for this operation, because of the possibility
of scratching piston bore or burring edges of seal
groove.
The double pin caliper uses a sealed for life bushing
and sleeve assembly. If required this assembly can be
serviced using the following procedure.
(1) Using your fingers push on one end the inner
sleeve until it pops out of the bushing. Then grasp the
inner sleeve with your fingers and pull the inner sleeve
out from the inside of the bushing (Fig. 3).
(2) Using your fingers collapse one side of the bush-
ing. Then pull on the opposite side to remove the
bushing from the caliper assembly (Fig. 4).
CLEANING AND INSPECTION
Clean all parts using alcohol or a suitable solvent
and wipe dry. Clean out all drilled passages and bores
on the caliper assembly body. (Whenever a caliper
has been disassembled, a new boot and seal must
be installed at assembly).
Inspect the caliper assembly piston bore for scoring
or pitting. Bores that show light scratches or corrosion,
can usually have the scratches or corrosion removed
using crocus cloth.
Bores that have deep scratches or scoring should be
honed. Use Caliper Hone, Special Tool C-4095, or
equivalent providing the diameter of the bore is not
increased more than 0.0254 mm (0.001 inch) (Fig. 5).
If the bore does not clean up within this specification,
a new caliper housing should be installed. Install a new
piston if the old one is pitted or scored.
When using Caliper Honing Tool, Special Tool
C-4095, 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 with brake fluid; wipe dry with a clean,
lint free cloth and then clean a second time.
ASSEMBLING REAR DISC BRAKE CALIPER
Clamp caliper in vise (with protective caps on vise
jaws).
Fig. 2 Removing Piston Seal
Fig. 3 Removing Inner Sleeve From Bushing
Fig. 4 Removing Bushings From Caliper
Ä
BRAKES
5 - 49
CAUTION: Excessive vise pressure will cause bore
distortion and binding of piston.
Dip new piston seal in clean brake fluid and install
in the groove of the caliper bore. Seal should be po-
sitioned at one area in groove and gently worked
around the groove (Fig. 6), using only your fingers
until properly seated.
NEVER USE AN OLD PISTON SEAL. (Be sure
that fingers are clean and seal is not twisted or
rolled) (Fig. 6).
Coat new piston boot with clean brake fluid leav-
ing a generous amount inside boot.
Position dust boot over piston after coating with
brake fluid.
Install piston into caliper bore pushing it past the
piston seal until it bottoms in the caliper bore (Fig.
7).
CAUTION: Force must be applied to the piston uni-
formly to avoid cocking and binding of the piston in
the bore of the caliper.
Position dust boot in counterbore of the caliper pis-
ton bore.
Using a hammer and Installer Piston Caliper Boot,
Special Tool C-4383-7 and Handle, Special Tool
C-4171, drive boot into counterbore of the caliper
(Fig. 8).
Fig. 5 Honing Piston Bore
Fig. 6 Installing New Piston Seal
Fig. 7 Pushing Piston into Bore
Fig. 8 Installing Boot in Caliper
5 - 50
BRAKES
Ä
Use the following steps, to install the Guide Pin
Sleeve Bushings into the caliper assembly.
(1) Fold the bushing in half lengthwise at the solid
middle section of the bushing (Fig. 9).
(2) Using your fingers insert the folded bushing into
the caliper assembly (Fig. 10). Do not use a sharp
object to perform this step do to possible damage
to the bushing.
(3) Unfold the bushing using your fingers or a
wooden dowel until the bushing is fully seated into the
caliper assembly. Flanges should be seated evenly on
both sides of the bushing hole in the caliper assembly
(Fig. 11).
Install the Guide Pin Sleeve into the guide bushing
using the following procedure.
(1) Install the sleeve into one end of the bushing
until the seal area of the bushing is past the seal
groove in the sleeve (Fig. 12).
(2) Holding the convoluted end of the bushing with
one hand. Push the sleeve through the bushing (Fig.
13) until the one end of the bushing is fully seated
into the seal groove on the one end of the sleeve.
(3) Holding the sleeve in place work the other end
of the bushing over the end of the sleeve and into the
Fig. 11 Bushing Correctly Installed In Caliper
Fig. 12 Installing Caliper Sleeves
Fig. 9 Folded Caliper Guide Pin Bushing
Fig. 10 Installing Caliper Guide Pin Sleeve Bushings
Ä
BRAKES
5 - 51
seal grove (Fig. 13). Be sure the other end of the
bushing did not come out of the seal grove in the sleeve.
(4) When the sleeve is seated properly into the
bushing. The sealed for life bushing can be held be-
tween your fingers and easily slid back and forth
without the bushing seal unseating from the sleeve.
Before installing caliper assembly on vehicle, inspect
braking disc. If any conditions as described in Check-
ing Braking Disc for Runout and Thickness are present
the braking disc, must be replaced or refaced. If the
braking disc does not require any servicing, install
caliper assembly.
Install brake hose onto caliper using banjo bolt.
Torque the brake hose to caliper assembly banjo bolt to
33 N
Im (24 ft. lbs.). New seal washers MUST al-
ways be used when installing brake hose to cali-
per.
Bleed the brake system (see Bleeding Brake System).
Pump the brake pedal several times to be sure that the
vehicle has a firm pedal, before the vehicle is moved or
driven.
Fig. 13 Installed Caliper Bushing Sleeve
5 - 52
BRAKES
Ä
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст