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)

21

Kit
Caliper Kit Rationalized
(Includes 803114)

Carrier Kit

Hubs

Piece Number

Components Included in Kit

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)

K020514

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

803138

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

K045298

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

K045297

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

U-shaped - Iron/Aluminum, LMS/Standard Bearing Packages
See hub supplier
for these standard
Flat - Iron/Aluminum, LMS/Standard Bearing Packages
hub products
Bendix® Splined Disc®
Rotor Attaching Kit

K037767

All Splined Disc® Rotor Applications (SD-1, SD-2, SD-3)

K038573

Heavy-Duty 138mm U-shaped Rotor and Fasteners

Rotors

K038574

Heavy-Duty 150mm U-shaped Rotor and Fasteners

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

Shields

Air Disc Brake Pad Wear Kit

K032135

Vertical Drive Axle Pad & Rotor Shield Kit

K061768

FF Vertical Pad & Rotor Shield Kit

K061770

FL Vertical Pad & Rotor Shield Kit

K123970

Steer Axial Rotor Shield Kit

K109114

Pad / Rotor Measuring Tool

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

22

5.0.1 GENERAL INFORMATION ABOUT
BENDIX® AIR DISC BRAKE MAINTENANCE
When working on Bendix® Air Disc brakes, please note
the following:
•

Read and follow the Safe Maintenance Practices on
page 2.

•

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.

•

•

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.

Kit

Air Disc Brake 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
Bendix® Splined Disc® Rotor Attaching Kit
Rotor

See
Section
5.1
5.2
5.3
5.3
5.3
5.4
5.5
5.6
5.7
5.7
5.7

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.

5.1 AIR DISC BRAKE DUST SHIELD KIT

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

Remove
Brake Pads?

Remove Caliper/
Carrier from
Vehicle?

Remove
Actuator from
Caliper?

Section 5.2

Section 5.3

Section 5.4

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

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

23

Washer
Spring
Clip

Spring
Clip
Washer
Pad Shield
Pad Shield

Rotor Shield

Rotor Shield

Torque
Plate
Fastener

Fastener

Torque
Plate
Fastener

Fastener

(with Washer)

Lock
Washer

Rotor
Shield

Rotor Shield

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

Figure 32 – Trailer Axle Exploded View with Inset
Showing Rotor Shield Installation

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.)

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).

5.1.3 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
(59.6 Nm).

5.2 PAD REPLACEMENT

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 (32.5 Nm).

View this procedure online at brake-school.com or order
Bendix DVD (BW7356) available on bendix.com.

24

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.

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 Sensor
(if installed)

104
Cable Protection Plate

Version 1

101
Sensor

Version 2
104
Cable
Protection Plate

101
Sensor
106
Mounting Pin

103
Cable to Electrical
Supply

103
Cable to Electrical
Supply
44
45
11
26
44
Pin

2

11 Pad Retainer Bar
ard
tbo
Ou

26 Spring Clip

Figure 34 – Pad Retainer Bar Removal

d

oar

Inb

45 Washer

12

5.2.6 See Figures 33 & 35. 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.
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.
5.2.3 If the air disc brake is equipped with an electronic
wear sensor indicator (see top of Figure 33), note
how the wire is installed in the wire shield then
remove and discard the wire shield. Disconnect
the wear sensing harness from the jumper harness
before removing the pads. The wear sensing
harness and wire shield will be replaced with the
brake pads.
5.2.4 See Figure 34. Remove and discard the spring
clip (26) and washer (45).
5.2.5 While pressing against the pad retainer bar, remove
the pin (44). Discard the pad retainer bar (11).

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
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.
25

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 when the adjuster (23) is turned.
The shear adapter (61) 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
with a new (unused) shear adapter. In cases where a
second failure of the shear adapter confirms that the
adjustment mechanism is seized, the caliper must be
replaced.
5.2.8 Use a 10 mm, six-point box wrench (See Figure 37)
to turn the adjuster counterclockwise until sufficient
space exists to remove the brake pads. A clicking
noise occurs each time the adjuster turns.

5.2.12 Inspect the brake rotor (See Section 4.4).
5.2.13 Inspect the guide pins (See Section 4.5).
Important: To maintain optimal braking, Bendix strongly
recommends that whenever brake pads are replaced,
the complete axle set be replaced together. Use only
pads which are permitted by the vehicle manufacturer,
axle manufacturer, and/or disc brake manufacturer.
Failure to comply with this may invalidate the vehicle
manufacturer’s warranty.
Before installing the brake pads, use the adjuster to
fully retract the tappets to provide adequate clearance.
5.2.14 Clean the surfaces that will come in contact with
the brake pad.
Caution: When installing pads and retaining springs,
where appropriate, use heavy duty gloves and always
keep fingers away from potential pinch hazard areas.
2

CAUTION! Avoid overloading or damaging the adjuster
shaft. Do not use an open‑ended wrench since it may
damage the adjuster shaft.
12

Figure 39 – Pad Retaining Spring Installation

Figure 37 – Backing Off the Adjuster for Pad
Removal
d

oar

Inb
ard
tbo
u
O

5.2.15 To reinstall wear indicators (if used): Insert the
wear sensors into position in the new brake
pads. Route the sensor cable through the cable
protection plate channel and secure the plate with
the mounting hardware retained at disassembly.
(See Section 5.2.)
5.2.16 Install the blue pad retaining springs (2) onto the
brake pads (12) by inserting one end of the spring
onto the lug at the top of the brake pad (See Figure
39). Carefully apply enough force to permit the
second lug to fully engage, taking care to keep
fingers etc. away from the spring as it seats.
5.2.17 Pull the caliper fully outward and install the outboard