Service manual

Group 59 Anti-Lock Brake System (Bendix) Service Procedures
Front Axle Sensor Replacement
Removal
PERSONAL INJURY HAZARD! Before working on a
vehicle, set the parking brakes, place the transmission
in neutral, and block the wheels. Failure to do so can
result in unexpected vehicle movement and can cause
serious personal injury or death.
Do not work under a vehicle supported only by jacks.
Jacks can slip out from under the truck or fall over,
causing personal injury or death. Always use jack
stands under the truck.
1
Park the vehicle on a level surface, ap-
ply the parking brake, and block the
rear wheels. Ensure vehicle ignition is
OFF and transmission is in neutral.
2
Raise the tire with the sensor to be re-
placed off the ground. Place jack
stands under the axle.
3
Back off the slack adjuster to release
the brake shoes.
4
Remove the wheel from the axle.
5
Remove the brake drum.
6
CAUTION
Possible sensor damage. DO NOT pull on the sensor
cable in order to remove it. This may damage the sen-
sor.
Using a slight twisting motion, remove
the sensor from its mounting block.
Note: It may be necessary to wedge a
screwdriver between the tooth wheel
and the sensor in order to loosen it
from its mounting block. Use extreme
care not to damage the tooth wheel or
the sensor.
7
Remove the sensor spring clip from
the mounting block.
8
Cut any cable ties that hold the sensor
cable to the brake chamber hose or
frame components.
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