ZF 0636.100.820 SCREW PLUG for WG94 | OEM Genuine Part

Overview

The ZF 0636.100.820 SCREW PLUG is a critical sealing component engineered specifically for the WG 94 Series transmission family. This OEM genuine part functions as a threaded closure within the transmission housing, preventing fluid egress and maintaining hydraulic pressure integrity. Positioned at key access points on the 4661101013: TRANSMISSION HOUSING, this screw plug ensures that lubricant remains contained during high-torque operations. The SKU 0636.100.820 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-proof seal that withstands extreme thermal cycling and vibration common in heavy-duty industrial applications.

Symptoms of Failure

• Transmission fluid seepage around the plug head: A worn or cross-threaded 0636.100.820 often causes slow oil drips, leading to low fluid levels and potential gear damage.
• Hydraulic pressure loss during gear engagement: When this screw plug fails, you may notice delayed shifting or slipping in the WG94, as internal pressure cannot be maintained.
• Visible corrosion or thread galling on the plug body: Over time, exposure to heat and contaminants degrades the sealing surface, resulting in particulate contamination within the 4661301022: HOUSING.
• Audible air ingress or whining noise from the transmission: A compromised seal allows air to enter the system, causing cavitation and erratic clutch behavior.

Technical Specifications

Compatibility

This screw plug is a direct-fit component for the ZF WG 94 Series, including models such as WG94, WG180, WG200, and WG210 transmissions. It is also compatible with select off-highway and marine gearboxes that utilize the same housing architecture. The 0636.100.820 interfaces seamlessly with the 0631306174: CYLINDRICAL PIN for alignment and the 0769123894: TYPE PLATE for identification. Always verify thread pitch and housing depth before installation.

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