Bendix® ADB 22X™ Air Disc Brakes

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Bendix ADB 22X Air Disc Brakes Vehicle Pre-Trip
Training Inspection
Service Series
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ADB22X Inspection Processincluded in BW7356 in
the Service Data Sheet BW7308
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Bendix ADB22X Air Disc Brake Pre Trip
Inspection Brake Check

• All CDL Requirements for Air Braked Vehicles
  Remain Consistent with the Introduction of
• Air Disc Brakes
• Parking Brake Check
• Test Air Leakage Rate (Static check)
• Test Air Brake System for Leaks
• Test Low Pressure Warning Alarm and/or Signal
• Check That the Spring Brakes Come on
  Automatically.
• Check Rate of Air Pressure Buildup
• Inspect Service Brakes

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Bendix ADB22X Air Disc Brake
Basic Concepts Functional Understanding
Caliper
Lever
Tappets
Pad Retainer
Rotor
Brake Chamber
Roller Bearings
Bridge
Return Spring
Pads
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Bendix ADB22X Air Disc Brake
Component Identification Fastener Inspection

Look for any Loose fasteners. Identify signs such
as movement, rust streaks, etc..
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Bendix ADB22X Air Disc Brake
Section 5.3.2 During Step 5 Walk-around Ohio
Commercial Drivers License Manual Accessibility
may vary by vehicle configuration

• Park on level ground and chock the wheels to
  prevent the vehicle from moving.
• Release the Parking Brake
• Check Brake Adjustment

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ADB22X Air Disc BrakeAdjustment Inspection
Caliper free movement 0.024 - 0.043
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Bendix ADB22X Air Disc Brake

• Ohio Commercial Drivers License Manual
• .brakes equipped with automatic adjusters
  are found to be out of adjustment, the driver
  must take the vehicle to a repair facility as
  soon as possible to have the problem corrected.
  The manual adjustment of an automatic adjuster
  should only be done to allow safe transportation
  of vehicle to the repair facility

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ADB22X Air Disc BrakeAdjustment

• Remove the adjuster
• cover
• Identify that a
• shear adapter is
• installed
• Shear Adapter is designed to protect the caliper
  from over-torque
• If over-torque occurs, the shear adapter will
  fail (shear)
• Once replaced, the caliper can then be properly
  adjusted
• If two shear adapters fail consecutively, refer
  to the SD Sheet, BW7308 for trouble shooting
  procedure

Adjuster cover
Shear Adapter
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ADB22X Air Disc BrakeAdjustment

• Using a 10mm boxed end wrench or 6pt socket
• Rotate the shear adapter clockwise until brakes
  are tight
• Rotate shear adapter counter clockwise TWO (2)
  clicks

Shear Adapter
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ADB22X Air Disc BrakeAdjustment

• Leave the
• shear adapter
• installed
• Reinstall the adjuster
• cover
• Verify that the adjuster cover is properly
  installed

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ADB22X Air Disc BrakePad Wear Inspection

• Visual Inspection
• Disc Pad
• Wear Indicators
• Cast indicators located on caliper and carrier
• Alignment Indicates Pad Replacement is Required

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ADB22X Air Disc BrakePad Wear Inspection

• Visual Inspection
• Disc Pad
• Wear Indicators
• Cast indicators located on caliper and carrier
• Alignment Indicates Pad Replacement is Required

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ADB22X Air Disc BrakePad Wear Inspection

• Visual Inspection
• Disc Pad
• Wear Indicators
• Cast indicators located on caliper and carrier
• Alignment Indicates Pad Replacement is Required

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ADB22X Air Disc BrakeCaliper Sealing Integrity

• Visual Inspection
• Boot Seal Inspection

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ADB22X Air Disc BrakeCaliper Sealing Integrity

• Visual Inspection
• Boot Seal Inspection
• Adjuster Cover

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ADB22X Air Disc BrakeCaliper Sealing Integrity

• Visual Inspection
• Boot Seal Inspection
• Adjuster Cover
• Guide Pin Caps (2)

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ADB22X Air Disc BrakeCaliper Sealing Integrity

• Visual Inspection
• Boot Seal Inspection
• Adjuster Cover
• Guide Pin Caps (2)
• Guide Pin Boots (2)

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ADB22X Air Disc BrakeRotor Visual Inspection

• Visual Inspection
• Rotor Braking Surface

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ADB22X Air Disc BrakeRotor Visual Inspection

• Visual Inspection
• Rotor Braking Surface
• Minor heat check
• will not de-grade
• braking performance

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ADB22X Air Disc BrakeRotor Visual Inspection

• Visual Inspection
• Visual Inspection
• Rotor Braking Surface
• Minor heat check
• will not de-grade
• braking performance
• Cracks WILL
• significantly impact
• braking performance
• and brake life
• See ADB22X Service
• Data Sheet for detailed explanations

If Cracks are found, the driver must take the
vehicle to a repair facility as soon as possible
to have the problem corrected.
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Bendix ADB22X Air Disc Brake
For complete and detailed instructions, refer to
the Bendix ADB 22X Air Disc Brake Service Data
sheet BW7308 and View the Service Series DVD
BW7356
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Bendix Brand Foundation Brake Products
From Bendix Spicer Foundation Brake LLC Questions
and Answers
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Bendix ADB22X Air Disc Brake
Thank You