Bendix Commercial Vehicle Systems ADB22X-V Air Disc Brakes - Manual (Page 35)

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5.7 BENDIX ® SPLINED DISC ® HUB ROTOR
Bendix ® Splined Disc ® Hub Rotors are designed to assist
vehicle maintenance by typically allowing the rotor to be
serviced without requiring the entire hub/rotor assembly
be replaced.
Periodic inspection of the Splined Disc attachment
hardware is recommended to ensure optimum braking
performance. Bendix recommends verifying the torque on
the spring element fasteners whenever a brake inspection
is performed.
NOTE: Anytime that the entire hub/rotor assembly
is removed, Bendix recommends that the wheel seal
also be replaced at the same time, USING A HIGH-
TEMPERATURE SEAL. Follow the wheel seal and/or
vehicle manufacturer's guidelines for full installation
instructions. Adjust the bearings and refi ll bearing
oil to vehicle manufacturer's specifi cations.
When replacing a Splined Disc Rotor, Bendix strongly
recommends that the brake pads be replaced (as an
axle set.) Contact 1-800-AIR-BRAKE for appropriate
brake pad kit. Rotor replacement necessitates the
removal of the pads.
CAUTION: Follow all safe maintenance practices,
including those listed on page two of this document.
Park the vehicle (by other means than the foundation
brakes) on level ground and chock the wheels. Also
read the vehicle manufacturer's recommendations.
When installing pads, where appropriate, use heavy
duty gloves and always keep fingers away from
potential pinch hazard areas.
Bendix Air Disc Brakes are precision-engineered braking
mechanisms. The “friction couple” braking characteristics
have been carefully optimized and the rotor design and
materials have been matched with special formulation
brake pads for optimal performance, therefore use only
genuine Bendix
® brand parts and brake pads.
Rotor Replacement
5.7.1 Before removing the brake pads it is strongly
recommended that the air disc brake adjuster
mechanism be checked for correct operation (See
Section 4.1). When replacing brake pads, Bendix
strongly recommends that the pads be replaced as
an axle set.
5.7.2 Refer to the vehicle manufacturer’s recommendations
and release (or cage) spring brakes and remove the
wheel.
5.7.3 Remove the pads (See Section 5.2).
5.7.4 Remove the air disc brake (See Section 5.3).
5.7.5 Remove the hub rotor assembly.
Note: Follow the vehicle manufacturer's guidelines for
removal of the wheel hub and rotor assembly from the
vehicle in lieu of these instructions, where available.
CAUTION: Be sure to secure both the rotor and hub
before removing the retention clips.
5.7.6 Remove and discard the ten spring elements.
5.7.7 On drive axles, the ABS tone ring must also be
removed. (See Figure 86.) Retain for re-installation.
5.7.8 Use suitable hand tools to remove the intermediate
elements (spacers). Remove all the right-hand
intermediate elements (spacers) of each set fi rst
and then the rotor can be turned slightly to release
FIGURE 86 - SPLINED DISC ROTOR EXAMPLES - EXPLODED VIEWS
Splined Disc Rotor
Intermediate Elements
(Spacers)
Spring Elements
(Retention
Brackets)
ABS Tone Wheel
(press on)
Wheel Studs
Above: Splined Disc Rotor on Aluminum Drive Hub Above: Splined Disc Rotor on Aluminum Steer Hub
Hub Hub
ABS Tone
Wheel
& Fasteners
Intermediate Elements
(Spacers)
Spring Elements
(Retention
Brackets)
Wheel Studs
ID Label
DRIVE HUB
STEER HUB
ID Label