ZF 0501.325.286 SUPPORT RING | OEM Genuine Part

Overview

The ZF 0501.325.286 SUPPORT RING is a precision-engineered OEM genuine component designed to maintain axial alignment and distribute clamping loads within the planetary gearset of heavy-duty ZF transmissions. This hardened steel ring sits between the 4663101001: HOUSING and the rotating clutch drum assembly, preventing lateral displacement under high torque conditions. As a critical structural element, the SKU 0501.325.286 ensures that adjacent components—such as the 4663301025: COVER—remain securely positioned during operation. Without this support ring, the entire gear train would experience destructive axial play, leading to premature failure of the transmission assembly.

Symptoms of Failure

• Progressive oil seepage at the housing joint: A worn support ring allows the 0636100817: CAP SCREW torque to relax, creating micro-gaps that permit transmission fluid to weep past the gasket surface.
• Intermittent gear engagement hesitation: When the ring loses its dimensional integrity, the clutch pack clearance increases, causing delayed shifts and a “slipping” sensation under load.
• Metallic rattling from the bell housing: A fractured support ring permits the 0631306816: CYLINDRICAL PIN to shift, producing a distinct chatter during deceleration.
• Uneven wear patterns on the thrust washer: Axial misalignment from a deformed ring accelerates scoring on adjacent bearing surfaces, visible during disassembly.

Technical Specifications

Compatibility

This support ring is engineered for ZF WG-series powershift transmissions commonly used in construction machinery. It is a direct fit for the WG180, WG200, and WG211 models, where it interfaces with the planetary carrier assembly. The part also appears in certain 4WG-200 and 6WG-250 variants used in wheel loaders and graders. Always verify your transmission serial number against the OEM parts catalog before installation.

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