ZF 0634.312.798 GROOVED RING | OEM Genuine Part

Overview

The ZF 0634.312.798 GROOVED RING is a precision-engineered OEM genuine component designed to secure and position internal assemblies within heavy-duty construction machinery transmissions. This grooved ring acts as a critical locking mechanism, preventing axial movement of gears and shafts during high-torque operation. Located within the clutch pack or planetary gear set, the part ensures consistent load distribution and maintains proper clearance between rotating elements. The SKU 0634.312.798 is manufactured to ZF’s exacting tolerances, guaranteeing a snug fit that reduces vibration and wear over extended service intervals. When installed alongside a 4699101155: HOUSING or 4699201018: HOUSING, this grooved ring forms a sealed, stable foundation for the transmission’s hydraulic circuits.

Symptoms of Failure

• Transmission oil leaks at the housing joint: A worn or deformed grooved ring can no longer maintain a tight seal, allowing ATF to seep past the 4699309077: HOUSING COVER interface, leading to low fluid levels and overheating.
• Intermittent gear slipping under load: When the ring loses its grip, shafts shift axially, causing clutch packs to disengage momentarily during excavation or lifting operations.
• Metallic rattling from the transmission bell housing: Excessive clearance from a fatigued grooved ring allows planetary gears to chatter against the 0636100132: TORX SCREW fasteners, producing audible noise.
• Hard shifting or delayed engagement: A compromised ring disrupts hydraulic pressure regulation, resulting in sluggish gear changes that reduce operator productivity.

Technical Specifications

Compatibility

This grooved ring is engineered for ZF heavy-duty transmissions commonly found in wheel loaders, excavators, and telehandlers. It is a direct replacement for the following ZF models: WG180, WG200, WG210, 4WG200, 6WG200, and 5HP-600 series. The part fits both standard and high-torque variants used in construction machinery from manufacturers such as Liebherr, Caterpillar, and Volvo CE. Always verify the groove diameter in your specific transmission housing before installation.

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