ZF 5838.300.143 RING | OEM Genuine Part

Overview

The ZF 5838.300.143 RING is a precision-engineered genuine OEM component designed for critical load distribution within heavy-duty construction machinery transmissions. This ring acts as a locating and thrust surface, ensuring correct axial alignment of gear sets and differential assemblies under extreme torque loads. As an OEM part, the SKU 5838.300.143 guarantees exact metallurgical composition and dimensional tolerances required for long service life in ZF powertrains. It sits directly within the final drive housing, interfacing with the 5838022003: REAR AXLE and the 5838109001: DIFFERENTIAL to maintain proper gear mesh depth.

Symptoms of Failure

• Transmission whine or growling noise during turns: A worn 5838.300.143 ring allows axial play, causing the differential gears to misalign under load, producing a distinct low-frequency growl.
• Premature rear axle seal leakage: Excessive ring wear shifts the 5838022003: REAR AXLE position, distorting the seal lip and leading to gear oil seepage around the hub.
• Intermittent gear slipping under heavy load: When the ring surface degrades, the 0750117075: TAPER ROLLER BEARING loses its preload, causing momentary torque loss during excavation or grading operations.
• Metallic debris in transmission fluid: Spalling of the hardened ring face introduces ferrous particles into the lubrication system, accelerating wear on the 5838300128: DIFFERENTIAL HOUSING.

Technical Specifications

Compatibility

This ring is a direct fit for ZF WG180, WG200, and WG250 series transmissions commonly used in wheel loaders, telehandlers, and graders. It is also compatible with ZF 4WG-200 and 4WG-310 powershift models. The 5838.300.143 ring specifically supports the differential carrier assembly where the 5838109001: DIFFERENTIAL and 5838300128: DIFFERENTIAL HOUSING interface. Always verify your transmission serial number against ZF parts catalogs before ordering.

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