ZF 4644.121.430 OIL PIPE for WG200 | OEM Genuine Part

Overview

The ZF 4644.121.430 OIL PIPE is a precision-engineered fluid conduit designed specifically for the WG 200 series transmissions. This OEM genuine part ensures the correct routing of hydraulic oil to critical lubrication points within the valve block and planetary gear sets. As an integral component of the transmission’s hydraulic circuit, the 4644.121.430 maintains consistent oil pressure and flow, preventing overheating and component wear. When paired with the 4644105424: DISCONNECTION assembly, this oil pipe guarantees leak-free operation under high-pressure conditions.

Symptoms of Failure

• Hydraulic oil leaks near the valve block area: A cracked or corroded 4644.121.430 oil pipe often causes visible fluid drips, leading to low transmission fluid levels and erratic shifting.
• Delayed or harsh gear engagement: Insufficient oil flow due to a blocked or damaged pipe results in sluggish clutch pack activation, especially during cold starts.
• Overheating transmission: When the oil pipe fails to deliver adequate lubrication to the planetary gears, friction increases, triggering thermal warnings on the dashboard.
• Whining noise from the transmission sump: Air ingestion through a fractured pipe creates cavitation sounds, indicating a loss of hydraulic prime.

Technical Specifications

Compatibility

This oil pipe is primarily engineered for the ZF WG200 series transmissions, including the WG200, WG200-1, and WG200-2 variants. It is also compatible with the WG180 series when used in conjunction with the 4644303538: OUTPUT FLANGE adapter kit. The 4644.121.430 fits directly into the 4644101224: TRANSMISSION HOUSING without modification. For optimal sealing, always replace the associated hexagon screw (0636021036) during installation.

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