ZF 0730.063.202 RING | OEM Genuine Part

Overview

The ZF 0730.063.202 RING is an OEM genuine sealing component engineered for high-stress environments within ZF heavy-duty powershift transmissions. This precision-machined ring sits between the rotating clutch drum and the stationary housing, maintaining critical hydraulic pressure for gear engagement. As part number 0730.063.202, it functions as a static seal in the clutch pack assembly, preventing cross-contamination between oil circuits. In construction machinery applications, this ring directly supports torque transfer by ensuring the clutch piston receives consistent fluid pressure during operation.

Symptoms of Failure

• Gradual clutch slippage under load – When the 0730.063.202 ring wears, internal pressure drops, causing the transmission to slip during heavy digging or grading operations.
• Erratic shift timing – A degraded ring allows fluid bypass, leading to delayed or harsh gear changes, particularly in cold-start conditions.
• External oil seepage at housing joint – Worn rings permit oil to migrate past the 4143101009 HOUSING interface, visible as drips on the transmission bell housing.
• Overheating transmission fluid – Internal leakage from a failing ring generates excess heat, often detected by elevated temperature gauges during extended use.

Technical Specifications

Compatibility

This ring is designed for ZF WG series transmissions commonly used in wheel loaders, graders, and telehandlers. It fits the following models: WG180, WG200, WG210, and WG240. The 0730.063.202 ring is also found in certain ErgoPower and Ecolife variants where clutch pack sealing is required. Always verify the housing bore condition when replacing this ring, as scoring on the 4143301025 HOUSING can accelerate wear on the new seal.

During installation, the ring must be paired with a fresh 0634313603 O-RING on the piston bore to ensure complete sealing. The assembly is secured using a 4475280018 SCREW PLUG to prevent fluid bypass at the port. For full transmission rebuilds, consider replacing the 4143298457 SEAL KIT simultaneously to address all wear-prone elastomers.

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