ZF 4651.121.015 OIL PIPE for WG100 | OEM Genuine Part

Overview

The ZF 4651.121.015 OIL PIPE is a precision-engineered fluid conduit specifically designed for the WG 100 series transmission. This OEM genuine part ensures the correct routing and delivery of pressurized transmission fluid to critical lubrication points within the valve body and rotating clutch assemblies. By maintaining consistent hydraulic pressure, the 4651.121.015 OIL PIPE prevents overheating and component wear. This SKU is a direct replacement for the original factory-installed pipe, guaranteeing a perfect seal and flow rate within the WG100 hydraulic circuit.

Symptoms of Failure

When the ZF 4651.121.015 OIL PIPE begins to fail, operators typically notice specific performance issues. Transmission oil leaks at the pipe junction are the most common symptom, often appearing as drips near the TRANSMISSION HOUSING interface. Another critical sign is delayed gear engagement or slipping under load, caused by insufficient hydraulic pressure reaching the clutches. You may also detect erratic shift timing or harsh shifting, as the compromised oil pipe disrupts the precise fluid flow required for smooth gear changes. Finally, low transmission fluid levels without visible external pooling can indicate internal leakage through a cracked or fatigued pipe.

Technical Specifications

Compatibility

This oil pipe is primarily engineered for the ZF WG 100 series transmissions. However, due to its hydraulic circuit design, it is also compatible with the WG 180 and WG 200 models that share the same valve body architecture. The pipe interfaces directly with the HOUSING and the HOUSING assembly, requiring a new O-RING during installation to prevent leaks. Always verify your transmission serial number against ZF parts catalogs to confirm fitment for your specific WG model variant.

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