ZF 4699.397.029 CARRIER | OEM Genuine Part

Overview

The ZF 4699.397.029 CARRIER is a critical load-bearing component within the planetary gearset of heavy-duty construction machinery transmissions. This OEM genuine part functions as the central hub that supports the planetary gears, ensuring precise alignment and torque distribution during high-stress operations. Positioned directly within the main gear train, the carrier (SKU: 4699.397.029) works in concert with the GK20 II to manage rotational forces, while interfacing with the HOUSING for structural integrity. Its forged steel construction resists fatigue from continuous load cycles, making it indispensable for excavators, wheel loaders, and other off-highway equipment.

Symptoms of Failure

• Gear Slipping Under Load: A worn carrier allows planetary gears to misalign, causing intermittent slipping during acceleration or uphill operation. This often manifests as a “clunking” sound when shifting gears.
• Metallic Debris in Transmission Fluid: As the carrier’s bearing surfaces degrade, fine steel particles contaminate the oil, visible during routine fluid changes. This accelerates wear on the INPUT shaft and OUTPUT components.
• Excessive Vibration at Idle: A cracked or warped carrier creates imbalance in the gearset, producing low-frequency vibrations felt through the chassis even when stationary.
• Oil Leaks Near the Transmission Housing: Structural failure of the carrier can distort the HOUSING seal surface, leading to fluid seepage around the bell housing area.

Technical Specifications

Compatibility

This carrier is engineered for ZF WG-series transmissions commonly used in construction machinery. It is a direct fit for the WG180, WG200, and WG250 models, as well as select variants of the WG310 series. Always verify your transmission’s serial number before ordering. The part integrates with the GK20 II planetary set and requires proper alignment with the INPUT and OUTPUT shafts during installation.

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