K028252

Bendix® Type 24 Universal (9, 18/2)

K027557

Bendix® Type 18/16 Piston Style Truck/Trailer Universal (1, 18/1)

K025670

Bendix® Type 18/24 Piston Style Truck/Trailer Universal (1, 18/1)

K025669

Bendix® Type 20/24 Piston Style Truck/Trailer Universal (1, 18/1)

K042457

Bendix® Type 16/24 Double Diaphragm Style (35)

K043329

Bendix® Type 18/24 Double Diaphragm Style (35)

K041960

Bendix® Type 20/24 Double Diaphragm Style (35)

K043148

Bendix® Type 22/24 Double Diaphragm Style (35)

K043270

Bendix® Type 24/24 Double Diaphragm Style (35)

K081142

Bendix® ADB22X™ 12° Steer and Drive Axial “A” (2A, 1)

K081143

ADB22X 12° Steer and Drive Axial “B” (2A, 1)

802984

ADB22X 0° Trailer Axial “A” (2A, 1) [Zero degree dual-beam carrier.]

802985

ADB22X 0° Trailer Axial “B” (2A, 1)

K149714

ADB22X-LT 0° Trailer Axial "A" [Caliper kit (1)]

K149715

ADB22X-LT 0° Trailer Axial "B" [Caliper kit (1)]

K081256

ADB22X 12° Steer and Drive Vertical “A” (2B, 1)

K081257

ADB22X 12° Steer and Drive Vertical “B” (2B, 1)

K081258

ADB22X 12° Steer and Drive Axle “A” (1)

K081259

ADB22X 12° Steer and Drive Axle “B” (1)

K019180

ADB22X 0° Trailer Axle “A” (1)

K019181

ADB22X 0° Trailer Axle “B” (1)

K051853

Steer and Drive Axle, Axial (2A, 9, 10, 20, 39, 40, 58, 61, 68)

K043288

Trailer Axle, Axial (2A, 9, 10, 20, 39, 40, 58, 61, 68)

K056559

Steer and Drive Axle, Vertical (2B, 9, 10, 20, 39, 40, 58, 61, 68)

K020505

Splined Disc® Brake - Aluminum - FF Steer, LMS Bearing Package (Steer Hub)

803134

Splined Disc Brake - Aluminum - FL Steer, LMS Bearing Package (Steer Hub)

802847

Splined Disc Brake - Aluminum - R Drive, LMS Bearing Package (Drive Hub)

K020514

Splined Disc Brake - Aluminum - FF Steer, Standard Bearing Package* (Steer Hub)

803138

Splined Disc Brake - Aluminum - FL Steer, Standard Bearing Package* (Steer Hub)

802859

Splined Disc Brake - Aluminum - R Drive, Standard Bearing Package* (Drive Hub)

K045298

Splined Disc - Aluminum - "TN" Trailer, Standard Bearing Package* (Drive Hub)

K045297
See hub supplier for
these standard hub
products

Splined Disc - Aluminum - "TP" Trailer, Standard Bearing Package* (Drive Hub)
U-shaped - Iron/Aluminum, LMS/Standard Bearing Packages
Flat - Iron/Aluminum, LMS/Standard Bearing Packages

Kit

Piece Number

Bendix® Splined Disc®
Rotor Attaching Kit

K037767

Rotors

Shields

Components Included in Kit
All Splined Disc Rotor Applications (SD-1, SD-2, SD-3)
®

802081

Severe-Duty 138mm U-shaped Rotor and Fasteners

K038573

Heavy-Duty 138mm U-shaped Rotor and Fasteners

802082

Severe-Duty 150mm U-shaped Rotor and Fasteners

K038574

Heavy-Duty 150mm U-shaped Rotor and Fasteners

802083

Severe-Duty Splined Disc Kit (SD-1, SD-2, SD-3, SD)

802569

Heavy-Duty Splined Disc Kit (SD-1, SD-2, SD-3, SD)

803129

(Dana-brand) Trailer Axle Pad & Rotor Shield Kit

803130

Axial Drive Axle Pad & Rotor Shield Kit

802948

Pad Shield Kit

K032135

Vertical Drive Axle Pad & Rotor Shield Kit

K022168

Vertical Drive Axle Rotor Shield

Table 2 – Maintenance Kits (continued)
See the Bendix Quick Reference Catalog (BW1114) for maintenance kits for other Bendix® brand air disc brakes.

5.0.1 GENERAL INFORMATION ABOUT
BENDIX® AIR DISC BRAKE MAINTENANCE

•

When replacing bearings – or for any other maintenance
procedure where the technician needs to remove the
caliper/carrier assembly from the vehicle to perform the
maintenance – replacement caliper/carrier bolts will
be required. Please note that due to the high torque
required, the original bolts cannot be reused. The bolts
are available from the vehicle manufacturer.

•

Not all wheels and valve stems are compatible
with Bendix Air Disc Brakes. Use only wheels and
valve stems approved by the vehicle manufacturer
to avoid risk of valve stem shear and other
compatibility issues.

When working on Bendix® Air Disc brakes, please note
the following:
•

Read and follow the Safe Maintenance Practices on
page two.

•

Depending on the particular axle, the technician may
need to remove the caliper/carrier to allow sufficient
access to perform the work.

•

CAUTION: When using a hoist to support the air
disc brake, do not attempt to use the pad retainer
bar as a bracing point as it is not designed to
support the weight of the brake. Instead, use a
brace (or chain) wrapped around the entire brake
to attach the hoist.

5.0.2 SERVICE DVD
Order Bendix part number BW7356 for a DVD showing
the full set of maintenance procedures included in this
Service Data sheet.

Kit
Dust Shields
Pad Kit (axle set)
Caliper Kit (rationalized)
Carrier Kit
Service Actuator
Spring Brake Actuator
Tappet/Boot Kit (wheel end kit)
Guide Pin, Seal and Boot Kit (wheel end kit)
Hubs
Splined Disc® Rotor Attaching Kit
Rotor

See
Section
Section 5.1
Section 5.2
Section 5.3
Section 5.3
Section 5.4
Section 5.4
Section 5.6
Section 5.7
Section 5.8
Section 5.9
Section 5.10

Remove
Brake Pads?
Section 5.2
Not Typically
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes

Remove Caliper/
Carrier from
Vehicle?

Remove
Actuator from
Caliper?

Section 5.3

Section 5.4

NA
No
Yes
Yes
Not Typically
Not Typically
Typically
Typically
Yes
Yes
Yes

NA
No
Yes
Yes
Yes
Yes
Typically
Typically
Yes
Yes
Yes

Table 3 – Other Required Sections for Maintenance Kits
21

5.1 AIR DISC BRAKE SHIELD KIT

5.1.1 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.
Note: Most torque plates manufactured after January 1,
2007 have the required torque plate tabs to permit these
shields to be mounted.

5.1.2 Remove and discard the spring clip and washer
from the pad retainer pin. Remove and retain the
retainer bar and retainer pin. Position the pad shield
as shown and reinsert the retainer bar. Install the
retainer pin. Use the included spring clip and washer
to secure the retainer pin. Check that the pad shield
is held securely in place by the retainer bar. See
Figure 31 or 32.
Spring
Clip
Washer

This shield kit includes a brake pad shield, a rotor shield
and the required attaching hardware for use in Bendix®
ADB22X™, ADB22X-V™ and ADB22X™-LT Air Disc Brake
applications where external contamination and excessive
road debris is a concern. Brake pad and rotor shields can
greatly reduce damage and/or premature wear of pads and
rotors under these conditions.

Pad Shield

During installation, verify that once the shield(s) are
installed they will not come into contact with any vehicle
components, suspension, housings, etc. through the full
range of motion of the wheel. Keep in mind the particular
use of the vehicle, the orientation of the brake on the axle
and torque plate, the proximity of other axles, and/or the
wheel/tire being used.

Rotor Shield

Torque
Plate
Fastener

Washer
Spring
Clip

Fastener

Pad Shield

(with Washer)

Lock
Washer

Rotor
Shield

Figure 32 – Trailer Axle Exploded View with Inset
Showing Rotor Shield Installation
5.1.3 Drive or Steer Axle Rotor Shields (See Figure
31). Position the rotor shield between the torque
plate and the rotor. The supplied cap screws pass
through the mounting tabs in the torque plate and
install into the shield. Torque cap screws to 44 ft-lbs
(528 in-lbs).

Rotor Shield
Fastener

Torque
Plate
Fastener
Rotor Shield

Figure 31 – Drive or Steer Axle Exploded View with
Inset Showing Rotor Shield Installation
22

5.1.4 Trailer Axle Rotor Shields (See Figure 32).
Position the rotor shield with the torque plate
between the shield and the rotor. With one
(supplied) lock washer in place on each cap screw,
pass the screws through the shield before mounting
onto the threaded torque plate holes. Torque the
cap screws to 24 ft-lbs (288 in-lbs).
Note: The installation of air disc brake shields does not
eliminate the need for periodic maintenance and inspection
of the air disc brake and entire wheel end for damage and/
or wear. In addition, the truck and trailer manufacturer’s
specific criteria for the brake shield requirements on air
disc brakes should be consulted before either installing or
removing air disc brake shields from a wheel end(s).

5.2 PAD REPLACEMENT

5.2.1 CAUTION: Follow all safe maintenance
practices, including those listed on page 2 of
this document. Park the vehicle (by other means
than the foundation brakes) on level ground and
chock the wheels.
The Bendix DVD (BW7356) shows this procedure.
Important: If the vehicle is equipped with spring brakes,
cage the spring brakes on all axles to be worked on.
Consult the vehicle manufacturer’s instructions as
necessary. For Bendix® piston-style, see Section 5.4.
ELECTRONIC WEAR
104
SENSOR
(if installed) Cable Protection
Plate

101
Sensor

101
Sensor

5.2.3 If the air disc brake is equipped with an electronic
wear sensor indicator (see top of Figure 33), remove
and retain the mounting hardware for the cable
protection plate. The cable protection plate can
then be set aside while servicing the pads. Note the
position of the sensors in the brake pad channels,
and carefully remove them. In most cases you do
not need to release the cable connector in order to
move the sensors away from the pad installation
work area. Inspect the wear sensors – replace if
damaged or abraded.
5.2.4 See Figure 34. Remove and discard the pin
retention clip (26) and washer (5).

105
Cable Guide
(2 alternate
designs
used)

44
Pin

11 Pad Retainer Bar

103
Cable to Electrical
Supply

45 Washer
26 Spring Clip
44

Figure 34 – Pad Retainer Bar Removal

45

5.2.5 While pressing against the pad retainer bar, remove
the pin (11). Discard the pad retainer bar.

11
26
2

ard
tbo
Ou

12

d

oar

Inb

5.2.6 With the spring brake released (or caged), remove
the adjuster cap (37) using the tab, taking care not
to move the shear adapter (61). Note: Two sizes
of adjuster caps are supplied in kits; use the same
size as before in step 5.2.20.
5.2.7 Inspect the shear adapter (61). If significant
corrosion and/or damage is present, remove the
adjuster adapter using needle-nose pliers and
replace with the adapter supplied in the kit and
clean as necessary.
37
Cap

23 Adjuster
61 Adapter
37

61

Figure 33 – Pad Replacement
5.2.2 Raise the complete axle to be worked on until the
tires clear the ground. See the vehicle maintenance
manual instructions for removing the wheels.

Tab

37
Cap

Figure 35 – Exploded
View of Adjuster and
Adapter

Tab

Figure 36 – Cap
Installed: Tab Location

For illustration purposes, the exploded view (Figure 35)
shows the adjuster (23) and shear adapter (61) separated.
When using the adjuster mechanism, always have the
shear adapter installed on the adjuster.
23

CAUTION: Never turn the adjuster (23) without the
shear adapter (61) installed. The shear adapter is a
safety feature and is designed to prevent too much
torque being applied. The shear adapter will fail (by
breaking) if too much torque is used.
Note: For wheel-ends with spring brakes, if a shear adapter
fails, always double-check to verify that the spring brake
has been released (or caged). If the spring brake is applied,
release or cage the brake (ensure that the air system
pressure is at least 90 psi) and start the procedure again.
If the shear adapter fails, you may attempt a second time