ZF 4699.303.127 PLANET CARRIER | OEM Genuine Part

Overview

The ZF 4699.303.127 PLANET CARRIER is a critical rotating assembly within the planetary gear set of heavy-duty ZF transmissions. This OEM genuine part transfers torque from the sun gear to the planetary gears, enabling the speed reduction and torque multiplication required for demanding construction machinery applications. The carrier houses the planetary gear shafts and bearings, ensuring precise gear alignment under extreme loads. The SKU 4699.303.127 is engineered to ZF’s original specifications, guaranteeing exact fitment and load distribution within the transmission housing. When paired with a properly sealed 4699101070: HOUSING and a robust 4699301146: HOUSING, this planet carrier maintains the structural integrity of the gear train. Additionally, the 4699309085: HOUSING COVER and 0636101411: CAP SCREW are essential for securing the assembly and preventing contamination.

Symptoms of Failure

When the ZF 4699.303.127 planet carrier wears out, operators often notice distinct operational issues. Gear slipping under load is a primary symptom, as worn carrier pockets allow planetary gears to misalign, causing intermittent power loss during excavation or lifting. Metallic grinding noises from the transmission indicate that the carrier’s bearing surfaces have degraded, allowing gear teeth to contact improperly. Oil contamination with metallic particles is another clear sign, as the carrier’s hardened surfaces shed debris into the lubricant. Finally, erratic shifting or delayed engagement occurs when the carrier’s axial play exceeds tolerances, affecting clutch pack timing. Addressing these symptoms early prevents catastrophic damage to the 4699101070: HOUSING and adjacent components.

Technical Specifications

Compatibility

This planet carrier is designed for ZF’s WG series powershift transmissions commonly used in wheel loaders, dozers, and excavators. It is compatible with the following transmission models: WG180, WG200, WG210, and WG250. The 4699.303.127 also fits select variants of the Ecomat series (4HP/5HP) used in older construction equipment. Always verify your transmission’s serial number against the carrier’s spline count and pilot diameter. For complete assembly, this carrier integrates with the 4699102108: INPUT shaft and requires proper sealing via the 0634801038: SEALING RING.

Related Components