ZF 4699.801.253 GK10 | OEM Genuine Part

Overview

The ZF 4699.801.253 GK10 is a precision-engineered gearshift component designed for heavy-duty construction machinery transmissions. This OEM genuine part functions as the primary shift actuator within the transmission valve body, directing hydraulic pressure to engage specific gear sets. The SKU 4699.801.253 is critical for ensuring smooth, reliable gear changes under extreme load conditions. When installed correctly, this GK10 unit maintains the hydraulic integrity required for consistent power delivery in wheel loaders, graders, and dump trucks. It sits directly within the transmission control assembly, interfacing with the 4699001251: GK10 to regulate clutch pack engagement.

Symptoms of Failure

• Delayed or harsh gear engagement: When the 4699.801.253 wears internally, operators experience a noticeable lag between shifting and actual gear engagement, often accompanied by a jarring thud. This is a common long-tail search query for “ZF transmission slow to engage in loader.”
• Intermittent gear slipping under load: A failing GK10 unit cannot maintain consistent hydraulic pressure, causing the transmission to slip out of gear when the machine is under heavy load, such as during digging or climbing. Search for “ZF transmission slipping when digging” often leads to this part.
• Hydraulic oil contamination from internal debris: As the spool valve inside the 4699.801.253 degrades, metal particles can enter the transmission fluid, leading to clogged filters and accelerated wear on other components. This is frequently searched as “metal shavings in ZF transmission oil.”
• Erratic shift patterns or neutral lockout: The transmission may fail to select certain gears or randomly shift between ranges, indicating the GK10 is no longer properly channeling pilot pressure. This symptom is often reported as “ZF transmission stuck in neutral.”

Technical Specifications

Compatibility

This 4699.801.253 GK10 is engineered for ZF’s WG series powershift transmissions commonly used in construction machinery. It is a direct fit for the WG180, WG200, and WG210 transmission models. These units are found in OEM equipment from manufacturers such as Volvo, Case, and New Holland. The part also integrates with the 4699101143: HOUSING and the 4699103074: OUTPUT shaft assembly. For complete sealing, pair it with the 0501329881: HOUSING COVER to prevent fluid bypass.

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