ZF 4699.801.260 GK10 | OEM Genuine Part

Overview

The ZF 4699.801.260 GK10 is a critical OEM genuine assembly component designed for heavy-duty construction machinery transmissions. This part functions as the primary gearshift control unit within the transmission housing, managing hydraulic flow to engage forward and reverse clutch packs. Positioned directly within the valve body section, the GK10 (SKU: 4699.801.260) regulates pressure distribution for smooth gear transitions under extreme load conditions. It interfaces seamlessly with the HOUSING and HOUSING COVER to form a sealed hydraulic circuit, ensuring consistent performance in excavators, wheel loaders, and graders.

Symptoms of Failure

• Delayed or harsh gear engagement: When the GK10 wears internally, operators notice a 2-3 second lag when shifting from neutral to drive or reverse, often accompanied by a jarring clunk.
• Intermittent transmission slipping under load: The part’s worn spools cause pressure drops, leading to clutch slip during uphill travel or heavy digging cycles.
• Hydraulic fluid contamination: Degraded seals within the 4699.801.260 allow metal particles to circulate, often detected by dark, gritty oil on the dipstick.
• Erratic shift patterns: The transmission may unexpectedly downshift or fail to hold a gear, particularly when the O-RING seal around the GK10 loses elasticity.

Technical Specifications

Compatibility

This genuine ZF GK10 unit is engineered for the following transmission models commonly found in construction machinery: ZF WG180, ZF WG200, ZF WG210, and ZF WG150. It also fits select variants of the ZF 4WG-200 and ZF 6WG-250 series used in articulated dump trucks and crawler dozers. Always verify the existing part number stamped on your valve body before ordering. The 4699.801.260 replaces earlier revisions 4699.801.250 and 4699.801.240.

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