ZF 0630.501.012 RETAINING RING | OEM Genuine Part

Overview

The ZF 0630.501.012 RETAINING RING is a precision-engineered OEM genuine component designed to secure axial positioning within ZF powershift transmissions. This snap ring fits into a machined groove to lock assemblies such as clutch packs, bearing races, or planetary gear sets in place, preventing unwanted movement under high torque and vibration. As a critical fastening element, the SKU 0630.501.012 ensures that internal transmission components remain correctly aligned during operation. When replacing this retaining ring, it is common to also inspect the adjacent 4143101016: HOUSING for wear, as a compromised ring can damage the housing groove over time.

Symptoms of Failure

• Transmission gear slipping under load: A worn or fatigued retaining ring can allow clutch packs or gears to shift out of position, causing intermittent power loss during acceleration.
• Unusual metallic rattling or clicking noises: When the ring loses tension, internal components may vibrate or move axially, producing audible sounds from the transmission housing.
• Oil leaks near the housing seam: A failed retaining ring can permit axial play that distorts the 4143301039: HOUSING seal surface, leading to fluid seepage around gaskets.
• Hard shifting or delayed engagement: Misalignment caused by a loose retaining ring can prevent proper hydraulic pressure buildup, resulting in sluggish gear changes.

Technical Specifications

Compatibility

This retaining ring is primarily used in ZF heavy-duty powershift transmissions found in construction machinery. Based on its design and application, the 0630.501.012 is compatible with the following ZF transmission models: WG180, WG200, WG210, WG211, WG310, and WG311. It is also commonly specified for use in 4WG-200 and 5WG-210 series. Always verify the groove dimensions in your specific housing. When servicing, always replace the 0501318136: GASKET to ensure a proper seal between the housing and cover plate.

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