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The HD90129340499 is the left-hand rear brake backing plate dust cover for Shacman X3000 and X5000 trucks with Hande drive axles. It is specifically designed for axles equipped with brake wear warning sensors — a detail that distinguishes it from standard dust covers. The cover shields the brake backing plate, brake shoes, and the wear sensor connector from road debris, water, and mud. Without it, the wear sensor wiring and connector are exposed to stone impact and moisture ingress, causing false warning signals or complete sensor failure. The cover also protects the brake shoe pivot points and return springs from contamination that accelerates wear. Right-hand companion: HD90129340498. Also fits Kamaz 65802/65952 and Ural-6370 with Hande axles.
Surface Treatment: Stamped steel plate with corrosion-resistant coating. Cover geometry matches the brake backing plate contour. Mounting holes align with the backing plate bolt pattern. Flanged edge for rigidity and debris deflection.
Manufacturing Process: Stamped from steel plate. Mounting holes punched or drilled to correct diameter and spacing. Edge flange formed in same stamping operation. Inspected for dimensional accuracy, hole position, flange integrity. Steel thickness selected for impact resistance without excess weight.
Structure Diagram: Formed steel plate shield with contoured profile matching the brake backing plate. Mounting holes align with backing plate bolt pattern. Flanged edge for rigidity. Positioned to shield brake shoe area, return springs, and wear sensor connector from debris and water splash.
Installation Position: Mounts on the left side of the rear brake backing plate on the Hande drive axle. Secured by the backing plate mounting bolts or dedicated cover fasteners. Left and right covers are not interchangeable — HD90129340499 is the left-hand unit and HD90129340498 is the right-hand unit.
Product Principle: The dust cover is a physical barrier that shields the brake backing plate components from road debris, water, and mud. On axles with brake wear warning sensors, the cover has additional importance — it protects the sensor connector and wiring from stone impact and moisture, which are the leading causes of false wear warnings and sensor failure. The cover also protects the brake shoe pivot points and return springs from contamination. Without the cover, brake dust and road grit accumulate on the pivot points, causing the shoes to bind and wear unevenly.
Diagnostic Note: Watch for: False brake wear warning light — cover damaged or missing, allowing debris or water to reach wear sensor connector. Visible damage or corrosion on cover — struck by debris or rusted through; replace to protect brake components. Brake shoe binding or uneven wear — cover missing or damaged, allowing brake dust and grit to accumulate on shoe pivot points. Wear sensor connector exposed or damaged — cover not shielding connector; replace cover and inspect sensor wiring. Before replacing, check wear sensor and connector for damage.
False brake wear warning or damaged dust cover on a Shacman X3000 or X5000? Check wear sensor connector for damage first. If cover itself is damaged or missing, this cover is the fix. Remember to order correct side: HD90129340499 left, HD90129340498 right. Send truck model, axle model, symptoms. We will confirm correct dust cover and respond with pricing, lead time, and dimensional data.
Contact Tolizer today to secure your brake dust cover supply.
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