ZF 0630.503.018 SNAP RING | OEM Genuine Part

Overview

The ZF 0630.503.018 SNAP RING (SKU: 0630.503.018) is a precision-engineered OEM genuine retaining ring designed for axial location of components within ZF construction machinery transmissions. This snap ring sits directly inside the TRANSMISSION HOUSING (4108101128), securing bearing assemblies and gear sets against axial movement under heavy load. It functions as a critical locking mechanism that prevents shaft displacement during high-torque operations in wheel loaders and graders. As a genuine ZF component, it ensures exact fitment and material hardness to withstand cyclic stress in off-highway applications.

Symptoms of Failure

• Transmission oil leaks at housing seam: A worn or broken snap ring allows the HOUSING (4108201296) to shift, breaking the seal and causing fluid seepage.
• Gear slipping under load: When the 0630.503.018 loses tension, shafts can drift axially, causing incomplete gear engagement and intermittent power loss.
• Unusual metallic rattling from bell housing: A loose snap ring permits bearing race movement, generating a distinct clattering noise during deceleration.
• Premature bearing failure: Without proper axial retention, bearings experience side-loading, leading to rough rotation and eventual seizure.

Technical Specifications

Compatibility

This snap ring is primarily used in ZF WG180 and WG200 series powershift transmissions, commonly found in construction machinery such as wheel loaders, dozers, and graders. It also fits select ZF Ergopower and Ecomix drivelines where the SCREW PLUG (4475280018) and OIL LEVEL GAGE (0501215601) are installed on the same housing. For verification, always cross-reference the housing bore diameter against the snap ring groove dimensions in your service manual.

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