ZF 4660.318.009 SCREW PLUG for WG200/WG92 | OEM Genuine Part

Overview

The ZF 4660.318.009 SCREW PLUG is a critical sealing component engineered specifically for the WG200 and WG92 transmission series. This OEM genuine part functions as a threaded closure element, typically positioned within the transmission housing or valve body to seal fluid passages, pressure test ports, or drain/fill openings. The SKU 4660.318.009 ensures a precise fit and leak-proof seal, preventing contamination ingress and maintaining hydraulic integrity under high-pressure operating conditions. When installed correctly, this screw plug works in concert with the 4660198001: PERIPHERALS assembly to maintain optimal lubrication flow throughout the gear train.

Symptoms of Failure

When the ZF 4660.318.009 screw plug wears or becomes damaged, operators may encounter several distinct failure modes. Oil seepage around the plug threads is the most common indicator, often visible as wet residue on the transmission housing exterior. Intermittent fluid pressure drops during gear engagement can occur if the plug loosens, leading to erratic shift quality. Contaminated transmission fluid from external debris ingress through a compromised seal is another frequent issue. Audible air suction noises near the plug location may indicate a vacuum leak, particularly in WG200 series units operating under heavy load.

Technical Specifications

Compatibility

This screw plug is directly compatible with ZF WG200 and WG92 series transmissions, including the WG180, WG200, WG210, and WG92 variants. It is commonly used in off-highway vehicles, construction equipment, and agricultural machinery where these transmissions are installed. The plug interfaces with the 4660101011: TRANSMISSION HOUSING and the 4660301018: HOUSING assemblies, and is frequently replaced alongside the 0501209818: RANGE SELECTOR during major overhauls. Always verify thread pitch and seating surface condition before installation.

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