ZF 4699.303.016 SHIM RING | OEM Genuine Part

Overview

The ZF 4699.303.016 SHIM RING is a precision-engineered OEM genuine component designed for critical axial clearance adjustment within heavy-duty ZF construction machinery transmissions. This hardened steel shim ring sits between the planetary gear set and the main housing assembly, ensuring correct preload and gear alignment. The SKU 4699.303.016 is a factory-machined part that compensates for manufacturing tolerances, preventing excessive end-play that leads to premature bearing failure. When paired with the 4699101046: HOUSING and the 4699301109: HOUSING, this shim ring establishes the precise stack height required for optimal gear mesh and load distribution.

Symptoms of Failure

• Transmission gear slipping under load: A worn or collapsed shim ring allows the planetary carrier to shift axially, causing intermittent gear disengagement during heavy excavation or grading operations.
• Low-frequency humming from the transmission housing: When the 4699.303.016 loses its calibrated thickness, gear backlash increases, producing a distinct metallic drone that intensifies with engine RPM.
• Premature bearing overheating: Incorrect shim clearance forces roller bearings to operate at skewed angles, generating localized heat that discolors the 4699301017: BEARING COVER and adjacent components.
• Oil contamination with metallic particles: A failing shim ring grinds against the 4699301085: COVER, shedding fine steel debris into the transmission fluid, which can clog filters and damage valve bodies.

Technical Specifications

Compatibility

This shim ring is engineered for ZF’s WG series powershift transmissions commonly installed in wheel loaders, dozers, and excavators. Verified compatible models include WG180, WG200, WG210, and WG240 series. It also applies to certain ERGOPOWER and ECOMIX drivelines where axial shimming of the planetary output shaft is required. Always confirm the stack height with a dial indicator before final assembly.

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