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Wabco  |  SKU: 6403221820

6403221820 Genuine Wabco Maxxus Air Disc Brake Caliper Left Side

$78900
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Description:
An Air Disc Brake Caliper 6403221820 is a component of a heavy-duty vehicle's disc brake system that uses compressed air to apply braking force. Maxxus Air Disc Brake Caliper Left Side For Freightliner, Kenworth, Volvo

Part Number: 6403221820
Condition: New
Manufacture/Brand: Wabco

Fits 6403221820 For

Manufacturer Model Years
Freightliner Cascadia 113 2017–2024+
Freightliner M2 112 Various years
Kenworth T660 2013
Volvo VNL 760 2019–2020
Volvo VNR Various configurations


Specifications:

 
  • Brake disc
    1.77 in
  • Calculated Volume (dm³)
    38.88
  • Diameter
    16.93 in
  • Mounting
    6x M20
  • Opposite
    640 322 105 0
  • Stroke
    0.79 in
  • Technical specification
    OE specification
  • Type
    MAXXUS



Purpose of using 6403221820:

  • Apply braking force – pushes the brake pads against the rotor to slow or stop the vehicle.
  • Provide controlled braking – allows the driver to regulate braking force through the air-brake system.
  • Distribute pressure evenly – helps apply the brake pads evenly to the rotor.
  • Dissipate heat – transfers and helps manage heat generated by friction during braking.
  • Maintain braking performance – works with the automatic adjustment mechanism to compensate for brake-pad wear.
  • Improve vehicle safety – provides reliable braking for heavy-duty trucks, buses, trailers, and other commercial vehicles.


Signs of a Bad Air Disc Brake Caliper 6403221820:

  • Reduced braking performance – The vehicle takes longer to stop or braking feels weaker.
  • Uneven brake pad wear – One pad wears significantly faster than the other.
  • Brake dragging – The brake does not fully release, causing constant friction.
  • Overheating – Excessive heat or a burning smell can come from the affected wheel.
  • Pulling during braking – The vehicle may pull to one side when the brakes are applied.
  • Unusual noises – Grinding, squealing, clicking, or rubbing sounds may occur.
  • Brake pad or rotor damage – A sticking or malfunctioning caliper can cause accelerated wear or rotor discoloration.
  • Air leakage – Damaged seals or connections can cause an air leak around the brake actuator/caliper assembly.
  • Caliper movement problems – The caliper may become stuck or fail to move correctly on its guides.
  • Brake warning indicators – Some vehicles may activate brake-system warning lights when a related fault is detected.


About the Manufacturer – Wabco:
WABCO (originally the Westinghouse Air Brake Company) is a global leader in vehicle control systems for commercial vehicles such as trucks, buses, and trailers. Founded in 1869 and later becoming a part of ZF Friedrichshafen AG in 2020, WABCO is best known for pioneering advanced braking, stability, and suspension technologies.

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