Dodge Durango (HB). Manual — part 68
6. Install the vacuum hose to the check valve (1).
7. Install the master cylinder (1) on the brake booster
and tighten the nuts (2) to 10 N·m (90 in. lbs.).
8. Reconnect the brake fluid level electrical connector
(4).
9. Recconnect the brake lines at the master cylinder
and tighten the lines to 19 N·m (170 in. lbs.)..
HB
BRAKES - BASE
5 - 51
10. Install the wiper arm and cowl assembly (1)
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER ARMS - INSTALLATION).
11. Fill and bleed the brake system. (Refer to 5 -
BRAKES - STANDARD PROCEDURE).
ROTORS
DIAGNOSIS AND TESTING
DISC BRAKE ROTOR
The rotor braking surfaces should not be refinished unless necessary.
Light surface rust and scale can be removed with a lathe equipped with dual sanding discs. The rotor surfaces can
be restored by machining with a disc brake lathe if surface scoring and wear are light.
Replace the rotor for the following conditions:
•
Severely Scored
•
Tapered
•
Hard Spots
•
Cracked
•
Below Minimum Thickness
ROTOR MINIMUM THICKNESS
Measure rotor thickness at the center of the brake shoe contact surface. Replace the rotor if below minimum thick-
ness, or if machining would reduce thickness below the allowable minimum.
Rotor minimum thickness is usually specified on the rotor hub. The specification is either stamped or cast into the
hub surface.
ROTOR RUNOUT
Check rotor lateral runout with dial indicator C-3339. Excessive lateral runout will cause brake pedal pulsation and
rapid, uneven wear of the brake shoes. Position the dial indicator plunger approximately 25.4 mm (1 in.) inward from
the rotor edge.
NOTE: Be sure wheel bearing has zero end play before checking rotor runout.
Maximum allowable rotor runout is 0.131 mm (0.002 in.).
5 - 52
BRAKES - BASE
HB
ROTOR THICKNESS VARIATION
Variations in rotor thickness will cause pedal pulsation,
noise and shudder.
Measure rotor thickness at 6 to 12 points around the
rotor face.
Position the micrometer approximately 25.4 mm (1 in.)
from the rotor outer circumference for each measure-
ment.
Thickness should not vary by more than 0.015 mm
(0.0059 in.) from point-to-point on the rotor. Machine
or replace the rotor if necessary.
STANDARD PROCEDURE
FRONT/REAR - DISC BRAKE ROTORS
The disc brake rotor can be machined if scored or
worn. The lathe must machine both sides of the rotor
simultaneously with dual cutter heads. The rotor
mounting surface must be clean before placing on the
lathe. Equipment capable of machining only one side
at a time may produce a tapered rotor. A hub mounted
on-vehicle lathe is recommended. This type of lathe
trues the rotor to the vehicles hub/bearing.
CAUTION: Brake rotors that do not meet minimum
thickness specifications before or after machining
must be replaced.
BRAKE DRUM IN HAT ROTOR MACHINING
The brake drum in hat rotor can be machined on a drum lathe when necessary. Initial machining cuts should be
limited to 0.12 - 0.20 mm (0.005 - 0.008 in.) at a time as heavier feed rates can produce taper and surface variation.
Final finish cuts of 0.025 to 0.038 mm (0.001 to 0.0015 in.) are recommended and will generally provide the best
surface finish.
Be sure the drum in hat rotor is securely mounted in the lathe before machining operations. A damper strap should
always be used around the drum to reduce vibration and avoid chatter marks.
The maximum allowable diameter of the drum braking surface is stamped or cast into the drum in hat rotor.
HB
BRAKES - BASE
5 - 53
CAUTION: Replace the drum in hat rotor if machining will cause the drum to exceed the maximum allowable
diameter.
REMOVAL
FRONT
1. Raise and support the vehicle.
2. Remove the wheel and tire assembly.
3. Remove the caliper (2) from the steering knuckle
(1), (Refer to 5 - BRAKES/HYDRAULIC/MECHAN-
ICAL/DISC BRAKE CALIPERS - REMOVAL) and
remove caliper adapter assembly.
NOTE: Do not allow brake hose to support caliper adapter assembly.
4. Remove the rotor (1) from the hub/bearing wheel
studs (2).
5 - 54
BRAKES - BASE
HB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст