ZF 4616.221.026 LUBRICATION TUBE for WG65 | OEM Genuine Part

Overview

The ZF 4616.221.026 LUBRICATION TUBE is a precision-engineered fluid delivery channel designed for the WG 65 series of heavy-duty transmissions. This OEM genuine part directs pressurized oil to critical bearing surfaces and gear meshes within the transmission housing, ensuring consistent lubrication under high-torque loads. As an integral component of the internal oil circuit, the SKU 4616.221.026 must maintain exact dimensional tolerances to prevent pressure loss. When installed alongside the TRANSMISSION HOUSING, this tube forms a sealed pathway that supports the entire hydraulic system’s efficiency.

Symptoms of Failure

• Visible oil leaks around the transmission casing: A cracked or deformed lubrication tube often causes fluid to escape near the housing joints, leading to low oil levels and overheating.
• Erratic gear engagement or delayed shifting: Insufficient oil flow from a blocked tube starves clutch packs, resulting in harsh or slipping shifts during acceleration.
• Whining or grinding noises from the gearbox: Metal-on-metal contact occurs when the tube fails to deliver oil to bearings, producing audible distress signals.
• Persistent low oil pressure warnings: A compromised tube disrupts the hydraulic circuit, triggering dashboard alerts even when the sump is full.

Technical Specifications

Compatibility

This lubrication tube is primarily engineered for the ZF WG 65 series, but it also fits select models in the WG180 and WG200 families due to shared hydraulic architecture. It is commonly used in WG65, WG180, and WG200 transmissions found in off-highway trucks, agricultural tractors, and industrial loaders. Always verify fitment with your specific transmission serial number before installation.

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