ZF 4699.823.048 GP21 | OEM Genuine Part

Overview

The ZF 4699.823.048 GP21 is a critical OEM genuine component engineered for the high-stress environment of construction machinery transmissions. This part functions as a precision-machined guide or thrust element within the planetary gearset assembly, ensuring correct axial alignment and load distribution during power transfer. The SKU 4699.823.048 is specifically designed to interface with the clutch pack and planetary carrier, reducing friction and preventing metal-on-metal contact that can lead to catastrophic transmission failure. As a genuine ZF part, it guarantees exact tolerances for reliable operation in wheel loaders, excavators, and other heavy equipment.

Symptoms of Failure

When the ZF 4699.823.048 GP21 begins to wear, operators may notice specific performance degradation. Transmission gear slipping under load is a primary indicator, often accompanied by a delayed engagement when shifting from neutral to drive. Unusual metallic grinding noises emanating from the transmission housing typically signal that the GP21 has lost its surface integrity. Oil contamination with fine metallic particles is another common symptom, detectable during routine fluid changes. Finally, erratic shifting or harsh clutch engagement can occur as the part fails to maintain proper clearance within the planetary assembly.

Technical Specifications

Compatibility

This GP21 component is primarily utilized in ZF WG series transmissions commonly found in construction machinery. It is a direct fit for the ZF WG180 and ZF WG200 transmission models, which power equipment from manufacturers like Liebherr, Caterpillar, and Volvo. The part also appears in certain ZF WG120 and WG150 variants where planetary gearset configurations require this specific thrust profile. Always verify your transmission serial number against the ZF parts catalog before installation.

During a full transmission rebuild, this GP21 should be replaced alongside other wear items. The 4699100019: BASIC PARTS kit contains the necessary seals and gaskets for reassembly. The 4699300139: HOUSING provides the structural envelope for the planetary set, while the 4699300156: GEAR SHAFT transmits torque through the assembly. For complete gear train integrity, the 4699300127: PLANET CARRIER must be inspected for wear on its bearing surfaces.

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