ZF 0630.004.199 SHIM RING | OEM Genuine Part

Overview

The ZF 0630.004.199 SHIM RING is a precision-engineered OEM genuine component designed to establish critical axial clearances within ZF powershift transmissions. This hardened steel shim ring sits between the planetary gear set and the clutch housing assembly, ensuring correct end-play tolerances for optimal gear engagement. As part number 0630.004.199, it functions as a sacrificial wear surface that prevents metal-on-metal contact between rotating assemblies. When installed alongside the 4699101018 HOUSING and the 4699301051 HOUSING, this shim ring maintains the precise spacing required for hydraulic clutch pack operation in heavy construction machinery.

Symptoms of Failure

• Transmission gear slipping under load: A worn 0630.004.199 shim ring allows excessive axial play, causing clutch packs to lose hydraulic pressure and slip during excavation or grading operations.
• Metallic grinding noise from transmission housing: When the shim ring thins beyond tolerance, planetary gears contact the 4699301054 HOUSING COVER, producing a distinct grinding sound during gear shifts.
• Low transmission oil pressure warnings: Incorrect shim ring thickness alters the stack height, reducing pump efficiency and triggering pressure fault codes on ZF electronic controllers.
• Premature bearing failure: A collapsed shim ring transfers axial loads directly to thrust bearings, leading to rapid bearing degradation and metal contamination in the oil sump.

Technical Specifications

Compatibility

This shim ring is engineered for ZF WG-series powershift transmissions commonly used in wheel loaders, graders, and excavators. Verified compatible models include WG180, WG200, WG210, and WG240 series. It also applies to select ZF 4WG-200 and ZF 6WG-250 transmissions where axial clearance adjustment is required during rebuild. For proper installation, always pair this shim ring with a new 4699301055 COVER gasket to prevent oil bypass.

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