ZF 0630.004.055 SHIM RING | OEM Genuine Part

Overview

The ZF 0630.004.055 SHIM RING is a precision-engineered OEM genuine component designed to establish critical axial clearance within heavy-duty ZF transmissions used in construction machinery. This thin, hardened steel ring sits between the planetary gear set and the housing, ensuring correct end-play for optimal gear engagement and load distribution. As a factory-specified shim, the SKU 0630.004.055 guarantees exact thickness and hardness to maintain factory tolerances during rebuilds or repairs. Without this shim, the transmission’s internal clearances can shift, leading to premature wear on adjacent assemblies like the 4699101086 HOUSING and the 4699301223 HOUSING.

Symptoms of Failure

• Transmission gear slipping under load: When the shim ring wears or is omitted, axial play increases, causing gears to lose positive engagement during heavy digging or lifting operations.
• Metallic grinding noise from the planetary section: Insufficient shim thickness allows gear faces to contact the housing, producing a distinct grinding sound during shifts.
• Premature bearing failure: Incorrect end-play forces thrust loads onto bearings, leading to overheating and eventual seizure of the output shaft.
• Oil contamination from metal debris: A worn shim ring sheds fine steel particles into the transmission fluid, which can clog the valve body and damage the 0636302022 SCREW PLUG sealing points.

Technical Specifications

Compatibility

This shim ring is primarily used in ZF WG180, WG200, and WG211 series powershift transmissions found in wheel loaders, excavators, and telehandlers. It is also compatible with certain ZF Ecomat 4HP and 5HP models where planetary end-play adjustment is required. Always verify clearance requirements against the service manual; pairing this shim with a new 0501319149 SCREW PLUG ensures proper sealing of the adjustment access port.

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