ZF 0501.325.287 SUPPORT RING | OEM Genuine Part

Overview

The ZF 0501.325.287 SUPPORT RING is a precision-engineered OEM genuine component designed to maintain critical axial alignment within the planetary gear sets of heavy-duty ZF transmissions. This support ring acts as a load-bearing spacer, ensuring that rotating assemblies remain securely positioned under high torque and thermal expansion. The part number 0501.325.287 is specifically machined to OEM tolerances to prevent lateral movement that can lead to gear misalignment. It is typically seated between the 4663101001: HOUSING and the 4663301025: COVER, where it absorbs radial forces and distributes clamping loads evenly across the assembly.

Symptoms of Failure

• Transmission housing oil seepage: A worn support ring allows the 0636100817: CAP SCREW torque to relax, creating micro-gaps at the housing interface that cause fluid weeping.
• Intermittent gear slipping under load: When the ring loses its dimensional integrity, axial play increases, allowing clutch packs to momentarily lose engagement during heavy excavation cycles.
• Metallic debris in transmission fluid: Surface fretting on the support ring generates fine steel particles that contaminate the hydraulic circuit, often misdiagnosed as bearing failure.
• Abnormal whining noise from the planetary section: Loss of ring thickness alters gear mesh depth, producing a distinct high-pitched whine during deceleration in construction machinery.

Technical Specifications

Compatibility

This support ring is primarily utilized in ZF WG180, WG200, and WG210 series powershift transmissions commonly found in wheel loaders, telehandlers, and graders. It also appears in select ZF 4WG-200 and 6WG-200 variants used in construction machinery from 2005 onward. For proper installation, ensure the 0631306816: CYLINDRICAL PIN is correctly aligned to prevent ring rotation during clutch pack actuation.

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