Ford Transit 2002 Owner's Manual page 137

symptoms. Certain components will be identified as possible sources while others will be
eliminated by the evidence. More importantly, the customer description can reveal unsafe
conditions which should be checked or corrected before a road test. The description will also
help form the basic approach to the road test by narrowing the concern to specific
components, vehicle speed or conditions.
Begin the road test with a general brake performance check. Using the description of the
concern, test the brakes at different vehicle speeds using both light and heavy pedal
pressure. Determine if the concern is in the front or rear braking system. First use the foot
brake and then the parking brake. If the condition (i.e. pull, vibration, pulsation) occurs
only on operation of the parking brake, the concern is in the rear brake system. If the
condition occurs when the foot brake is depressed, the concern is in the front brake system.
Avoid locking the brakes and sliding the tires. This condition will not indicate brake
efficiency. A heavily braked but turning wheel will stop the vehicle in a shorter distance
than locked wheels.
If the concern becomes evident during this check, make sure it fits the description given
before the road test. If the concern is not evident, attempt to duplicate the condition using
the information from the description.
If a concern exists, use the Brake System Symptom Chart in order to isolate it to a specific
sub-system and condition description. From this description, a list of possible sources can
be used to further narrow the cause to a specific component or condition.
Symptom Chart
Symptom
Brakes pull or * Worn or damaged brake shoes or
drift brake pads and linings.
* Abnormal wear or distortion of front
brake disc.
* Malfunctioning rear brake shoe
adjuster.
* Incorrectly adjusted parking brake.
* Incorrect wheel alignment
adjustment.
* Incorrect wheel bearing preload
adjustment.
* Grease or fluid on the brake shoes
or brake pads; glazed linings.
* Stuck or seized wheel cylinders or
brake calipers.
Possible Sources
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Action
* INSTALL new brake shoes or brake
pads.
REFER to: Brake Shoes
Brake, Removal and Installation) /
Brake Pads (206- 03 Front Disc Brake,
Removal and Installation).
* INSTALL a new front brake disc.
REFER to: Brake Disc
Disc Brake, Removal and
Installation).
* CHECK the automatic brake shoe
adjuster.
* ADJUST the parking brake cable.
REFER to: Parking Brake Cable
Adjustment (206-05 Parking Brake
and Actuation, General Procedures).
* ADJUST the wheel alignment.
* INSTALL a new wheel bearing as
necessary.
REFER to: Front Wheel Bearing
01 Front Suspension, Removal and
Installation).
* INSTALL new brake shoes or brake
pads.
REFER to: Brake Shoes
Brake, Removal and Installation) /
Brake Pads (206- 03 Front Disc Brake,
Removal and Installation).
* INSTALL a new wheel cylinder or
brake caliper.
REFER to: Wheel Cylinder
Drum Brake, Removal and
(206- 02 Drum
(206-03 Front
(204-
(206- 02 Drum
(206-02