4 Component Replacement
39
WABCO Maintenance Manual MM-0112 (Revised 07-18)
4 Component Replacem ent
Hazard Alert Messages
Read and observe all Warning and Caution hazard alert messages in
this publication. They provide information that can help prevent
serious personal injury, damage to components, or both.
To prevent serious eye injury, always wear safe eye protection
when you perform vehicle maintenance or service.
Release all air from the air systems before you remove any
components. Pressurized air can cause serious personal
injury.
When welding on an ABS- or ABS/ATC-equipped vehicle is
necessary, disconnect the power connector from the ECU to
prevent damage to the electrical system and ABS/ATC
components.
Component Removal and Installation
Wheel Speed Sensors
Sensor Lubricant Specification
WABCO specifications call for a sensor lubricant with the following
characteristics:
Lubricant must be mineral oil-based and contain molydisulfide. It
should have excellent anti-corrosion and adhesion characteristics,
and be capable of continuous function in a temperature range of
−40° to 300°F (−40° to 150°C).
Lubricants approved for use on WABCO sensors and spring clips are
as follows. Figure 4.1.
앫 Mobilith SHC-220 (Mobil)
앫 TEK 662 (Roy Dean Products)
앫 Staburags NBU 30 PTM (Kluber Lubrication)
앫 Valvoline EP 633
Figure 4.1
Removal
NOTE: When replacing the wheel speed sensor, the sensor spring
clip must also be replaced.
Park the vehicle on a level surface. Block the wheels to
prevent the vehicle from moving. Support the vehicle with
safety stands. Do not work under a vehicle supported only by
jacks. Jacks can slip and fall over. Serious personal injury and
damage to components can result.
1. Place blocks under the tires to stop the vehicle from moving.
Apply the parking brake.
2. If necessary, raise the tires off the ground. Place safety stands
under the axle.
3. Depending on the axle, wheel hub and brake configurations,
some components might have to be removed to obtain access
to wheel speed sensor. Follow the vehicle OEMs guidelines to
gain access to wheel speed sensor.
4. Disconnect the fasteners that hold the sensor cable to other
components.
5. Disconnect the sensor cable from the chassis harness.
6. Remove the sensor from the sensor holder. Use a twisting
motion if necessary. Do not pull on the cable. Figure 4.2 and
Figure 4.3.
Figure 4.1
4004479a
SENSOR
SPRING
CLIP
WHEEL SPEED
SENSOR
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