ZF 4651.252.026 for WG110 | OEM Genuine Part

Overview

The ZF 4651.252.026 is a critical OEM genuine component designed specifically for the WG 110 Series transmission. This part functions as a precision-engineered control element within the hydraulic valve body assembly, regulating fluid pressure and flow to ensure smooth gear engagement. The SKU 4651.252.026 is manufactured to ZF’s exacting tolerances, making it essential for maintaining the operational integrity of your transmission system. When installed alongside the TRANSMISSION HOUSING (4651101013), this component ensures that the internal hydraulic circuits remain properly sealed and responsive under heavy industrial loads.

Symptoms of Failure

When the ZF 4651.252.026 begins to wear out, operators typically notice three to four distinct failure symptoms. Delayed or harsh shifting is the most common indicator, often accompanied by a noticeable “clunk” when the transmission transitions between forward and reverse gears. Intermittent gear slippage under load, particularly during uphill climbs or when carrying heavy payloads, signals that the part is no longer maintaining adequate hydraulic pressure. Visible oil leaks around the valve body area, often appearing as drips on the transmission housing, indicate seal degradation. Finally, erratic transmission behavior such as unexpected neutral engagement or failure to hold a selected gear can be traced back to this component’s deterioration.

Technical Specifications

Compatibility

This genuine ZF part is primarily designed for the WG 110 transmission series, but it also shares compatibility with several other ZF models due to common valve body architecture. It is directly interchangeable with components used in the WG 180 and WG 200 series transmissions, provided the housing configuration matches. Additionally, the 4651.252.026 can be found in certain WG 150 and WG 250 variants where the hydraulic control block design is identical. For proper installation, ensure the HOUSING (4651301032) and the O-RING (0634303928) are inspected simultaneously to prevent cross-threading or seal failure. The HOUSING (4651301033) is also a common companion part when rebuilding the valve body assembly.

Related Components

Frequently Asked Questions

Q: Can the ZF 4651.252.026 be installed without replacing the O-rings?
A: It is strongly recommended to replace all associated seals, particularly the O-RING (0634303928), whenever this part is serviced. Reusing old seals often leads to immediate hydraulic leaks and premature failure of the new component.

Q: How do I verify if the 4651.252.026 is compatible with my WG 110 transmission?
A: Check the serial number on your transmission housing. The part is compatible with all WG 110 variants built after 2010. If your housing is older, compare the mounting hole pattern against the HOUSING (4651301032) dimensions to confirm fitment.

Q: What is the typical lifespan of this component under normal operating conditions?
A: In standard industrial applications with proper fluid maintenance, the ZF 4651.252.026 typically lasts 3,000 to 5,000 operating hours. Harsh environments or contaminated hydraulic fluid can reduce this lifespan significantly.