Description
Maximize fleet safety and ensure responsive braking performance across your commercial vehicles with the genuine Knorr-Bremse 17.5″ Air Disc Brake Caliper Assembly. Engineered by global braking leader Knorr-Bremse, this robust caliper assembly delivers exceptional clamping force to 17.5-inch wheel end systems, eliminating brake fade and uneven pad wear under heavy loads. Worn slider pins, seized internal tappets, and corroded housings eventually compromise braking efficiency, leading to extended stopping distances and costly downtime. This heavy-duty replacement caliper assembly solves those issues directly. It utilizes high-strength nodular cast iron, precision-machined internal guide mechanisms, and robust high-temperature seals to provide rapid actuation, ensure uniform pad-to-rotor contact, and withstand severe commercial transport abuse.
Technical Parameters
| Category | Specifications & Technical Details |
| High-Efficiency Twin-Piston Synchronized Clamping Force | We use a precision-engineered twin-piston drive architecture. Under brake chamber actuation, it applies thrust evenly to the brake pads, ensuring full contact between the friction lining and brake disc while eliminating uneven wear. |
| High-Strength Thermally Stable Nodular Cast Iron Housing | We precision-cast the Knorr-Bremse caliper body from high-grade nodular cast iron (GJS). It perfectly carries clamping stress of several tons and maintains structural integrity under extreme heat generated by frequent emergency braking. |
| Precision Floating Guide Pin & Dust Boot Protection | We equip the caliper with an optimized sliding guide system and specialty high-temperature rubber dust boots. This ensures the caliper slides freely and smoothly in the axial direction while completely blocking mud, de-icing salt, and moisture intrusion. |
| Integrated Automatic Internal Clearance Adjustment Mechanism | We build in a maintenance-free high-precision automatic adjustment device. It automatically compensates working clearance as the brake pads wear, keeping pedal travel consistent throughout the full service life. |
| Extreme Vibration-Resistant & Thermal-Resilient Design | We develop this caliper for extreme environments from -40°C cold to +900°C high temperature. It fully resists high-frequency severe chassis vibration, ensuring absolute safety and reliability over long-mileage operation. |
Applicable Car Brands & Models
Common warning symptoms include:
Vehicle Pulling to One Side: The truck or trailer pulls heavily to the left or right during braking due to a stuck or sluggish caliper piston.
Dragging Brakes or Overheated Hubs: The brake pad fails to retract after releasing the pedal, causing continuous friction, smoke, or excessively hot wheel rims.
Reduced Braking Efficiency: Noticeably longer stopping distances or a soft, spongy brake pedal feel.
Visible Air Leaks or Fluid/Grease Contamination: Hissing around the actuator interface or torn guide pin boots packed with road debris.
While Knorr-Bremse offers official service repair kits (such as guide pin kits, tappet and boot assemblies, and seal sets) for routine maintenance, complete caliper assembly replacement is strongly recommended if the main cast iron housing is cracked, heavily corroded, or if internal guide bores are structurally scored.
Yes, absolutely. After installing a new caliper assembly, technicians must manually check the running clearance, verify smooth axial slide movement, test the pneumatic system for air leaks using soapy water, and conduct a road or brake-roller test to ensure proper braking balance.
Each caliper assembly is bolted securely to a custom-molded industrial wooden or heavy corrugated cardboard base, wrapped in anti-corrosion VCI barrier film, and fitted with heavy-duty port plugs to protect precision machined surfaces and threads during global wholesale transit.
