Precision Axle Adjustment with Genuine Filler Ring AZ9111340017 for SINOTRUK Howo

Achieve perfect alignment and enduring reliability in your truck’s drivetrain with the critical Rear Axle Adjustment Bushing Filler Ring. This precisely engineered spacer, bearing the OEM part number AZ9111340017, is a fundamental component in the rear axle assembly of your SINOTRUK Howo. For fleet managers and technicians committed to optimal performance, sourcing genuine components is key. As a trusted supplier of authentic Sinotruk howo parts, we provide this original filler ring designed to exacting standards. The AZ9111340017 plays a pivotal role in setting the correct bearing preload and maintaining the structural spacing within the axle hub, directly influencing wheel stability, bearing life, and overall vehicle safety.

Rear Axle Adjustment Bushing Filler Ring

Регулировочная втулка заполнительное кольцо заднего моста

Anillo de Relleno del Buje de Ajuste del Eje Trasero

Core Function of the Adjustment Bushing Filler Ring AZ9111340017

The Rear Axle Adjustment Bushing Filler Ring, identified as AZ9111340017, is a precision-machined spacer located within the wheel end assembly of the rear axle. Its primary function is to occupy a specific axial space between bearing components, typically between the tapered roller bearing cone and a shoulder on the axle shaft or within the hub.

This component, the AZ9111340017, is crucial during the assembly and adjustment phase. When wheel bearings are installed, they require a precise preload—a controlled amount of pressure—to function correctly. Too loose, and the bearing will have excessive play, causing wheel wobble and uneven wear. Too tight, and the bearing will overheat and fail prematurely. The filler ring AZ9111340017 acts as a solid, non-compressible gap filler that helps the technician achieve this perfect preload when used in conjunction with adjustment nuts and shims. It ensures the bearing cone is positioned at the exact correct depth on the axle shaft.

Beyond adjustment, this ring also serves as a **sealing surface protector**. It helps maintain the proper alignment of sealing surfaces, preventing axle lubricant from leaking out and contaminants like water and dirt from entering the hub cavity. Therefore, a correctly sized and installed AZ9111340017 ring is fundamental for maintaining bearing longevity, preventing lubricant loss, and ensuring the wheel hub assembly remains secure under heavy loads and over long distances.

Technical Specifications and Design Parameters

The filler ring AZ9111340017 is defined by its exact dimensions and material properties. The table below outlines its primary technical specifications essential for identification and correct application.

Consequences of Improper Spacing and Maintenance Signs

Incorrect use of a damaged, worn, or non-genuine filler ring like the AZ9111340017 can lead to significant drivetrain issues. The most immediate symptom of a problem related to this spacer is **excessive wheel bearing play**. This manifests as a noticeable wobble or looseness in the rear wheel when lifted and shaken manually. Drivers may also hear a **low-pitched humming, growling, or rumbling noise** from the rear that increases with vehicle speed, a classic sign of bearing distress often caused by improper preload.

Furthermore, an incorrectly sized spacer can lead to **axle seal failure**. If the spacer does not position the bearing correctly, the lip of the oil seal may not contact the sealing surface properly, leading to gear oil leaks. Visually, grease or oil around the inner wheel rim or brake components can be a telltale sign. In severe cases, excessive heat generated by an overtightened bearing can be felt at the hub. Ignoring these issues can result in catastrophic bearing seizure, damage to the axle spindle and hub, and potentially a wheel-off situation—a severe safety hazard.

The AZ9111340017 filler ring itself is not a routine wear item, but it should be inspected whenever the rear wheel bearings are serviced or replaced. Check for signs of wear, pitting, or deformation on its faces. Crucially, it must never be reused if it shows any signs of wear or if the bearings are being replaced due to failure, as its precise dimensions are critical to the new bearing’s life. Always use a new, genuine AZ9111340017 during a bearing overhaul.

Installation Procedure and Technical Guidance

Installing the AZ9111340017 filler ring requires methodical care as part of a wheel bearing overhaul. After removing the axle shaft, hub, and old bearings, thoroughly clean all components, including the bore in the hub and on the axle shaft. Inspect the seating surfaces for any burrs or damage that could prevent the new AZ9111340017 ring from sitting perfectly flat.

The installation sequence is crucial. Typically, the inner bearing cone is pressed onto the axle shaft first. Then, the new AZ9111340017 filler ring is slid into place against the bearing’s back face. It must sit squarely. Following this, the hub and outer bearing are assembled. The critical step is adjusting the bearing preload using the axle nut to the manufacturer’s specified torque or preload drag measurement (using a dial indicator or torque wrench method). The presence of the correctly sized AZ9111340017 ensures that when the adjustment nut is tightened, it is compressing the bearing assembly to the correct starting point, allowing for precise fine-tuning.

**Never attempt to compensate for wear by reusing an old ring or stacking shims incorrectly.** The thickness of the AZ9111340017 is engineered for the assembly. Using an incorrect spacer will make proper bearing adjustment impossible, leading directly to premature failure. Always refer to the official SINOTRUK Howo service manual for the exact procedure, tightening sequences, and torque specifications for your specific model.