ZF 4108.303.214 BUSH | OEM Genuine Part

Overview

The ZF 4108.303.214 BUSH is a precision-engineered, OEM genuine bushing designed to serve as a critical wear surface within the planetary gearset assemblies of heavy-duty ZF construction machinery transmissions. This component acts as a low-friction interface between rotating shafts and stationary housings, absorbing radial loads and maintaining precise gear alignment under extreme torque conditions. The SKU 4108.303.214 is specifically manufactured to ZF’s original tolerances, ensuring a press-fit installation that prevents micro-movement and subsequent fretting corrosion. When installed alongside a TRANSMISSION HOUSING, this bushing provides the necessary rotational stability for the planetary carrier assembly, directly influencing shift quality and power delivery efficiency.

Symptoms of Failure

• Intermittent gear slipping under load: A worn 4108.303.214 bushing allows excessive radial play in the planetary gear set, causing the gear teeth to lose proper mesh engagement during high-torque operations like digging or climbing.
• Metallic grinding noise from the transmission sump: As the bushing material degrades, fine bronze or steel particles contaminate the hydraulic fluid, producing a distinct grinding sound that intensifies with engine RPM.
• Oil seepage around the transmission housing interface: Excessive bushing wear can distort the sealing surface, compromising the integrity of the SEALING RING and leading to visible fluid loss near the bell housing.
• Delayed engagement when shifting from neutral to drive: Worn bushings create internal clearance that delays hydraulic pressure buildup, resulting in a noticeable lag before the transmission responds to gear selection.

Technical Specifications

Compatibility

This bushing is engineered for ZF’s heavy-duty powershift transmission series commonly deployed in construction machinery. It is a direct fit for the WG180, WG200, and WG210 transmission models, where it supports the planetary gear carrier shaft. The 4108.303.214 also applies to select Ecomat 4HP and 6HP variants used in wheel loaders and excavators. For proper installation, ensure the SCREW PLUG and SCREW PLUG are torqued to factory specifications to prevent oil bypass. Always verify compatibility with your specific transmission serial number before ordering.

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