ZF 4646.162.407 OIL PIPE for WG250 | OEM Genuine Part

Overview

The ZF 4646.162.407 OIL PIPE is a critical hydraulic conduit engineered specifically for the WG 250 series transmission. This OEM genuine part ensures precise lubrication and cooling oil delivery to planetary gear sets and clutch packs within the transmission housing. By maintaining consistent fluid pressure, the 4646.162.407 oil pipe prevents overheating and reduces friction during high-torque operations. Installed directly within the valve body assembly, this component is essential for the longevity of your ZF drivetrain. The SKU 4646.162.407 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-free seal when paired with the TRANSMISSION HOUSING and HOUSING.

Symptoms of Failure

• Hydraulic fluid seepage around the pipe joints: A worn 4646.162.407 oil pipe often develops micro-cracks or degraded O-ring seats, leading to visible oil drips beneath the transmission bell housing. This is a common symptom when the pipe loses its structural integrity.
• Erratic gear engagement or delayed shifting: Insufficient oil flow due to a blocked or collapsed pipe causes pressure drops, resulting in harsh shifts or slipping during load changes. Operators frequently report “transmission hesitation” as a primary complaint.
• Overheating transmission fluid: A compromised oil pipe restricts cooling circulation, causing the transmission to run hotter than normal. This often triggers warning lights or burnt fluid odors, especially in WG250 units under heavy use.
• Unusual whining or grinding noises: Starvation of lubricant to bearings and gears produces metallic sounds. If the 4646.162.407 pipe fails completely, internal components may seize due to lack of oil delivery.

Technical Specifications

Compatibility

This ZF 4646.162.407 oil pipe is primarily designed for the WG 250 series transmissions. Based on its hydraulic routing profile, it is also compatible with the following ZF models: WG 180, WG 200, and WG 210. The pipe interfaces directly with the COVER assembly and is secured using HEXAGON SCREW fasteners. Always verify your transmission serial number before installation to ensure correct fitment.

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