ZF 5838.300.665 LUBRICATION TUBE | OEM Genuine Part

Overview

The ZF 5838.300.665 LUBRICATION TUBE is a precision-engineered OEM genuine part designed to direct pressurized oil flow to critical bearing surfaces and gear meshes within the transmission sump. Positioned inside the lower valve body or main case gallery, this tube ensures consistent lubrication delivery to the differential assembly and planetary gear sets. The SKU 5838.300.665 is a direct replacement for factory-installed components, maintaining the exact flow rate and pressure drop specifications required by ZF powertrains. Without this tube, localized oil starvation can occur, leading to accelerated wear on adjacent components such as the 5838109010: DIFFERENTIAL and the 2093209023: DIFFERENTIAL.

Symptoms of Failure

• Oil leaks at the transmission case seam: A cracked or deformed lubrication tube allows pressurized oil to escape past seals, creating visible drips under the vehicle. Search query: “ZF transmission oil leak from case seam”.
• Gear slipping under load: Insufficient oil delivery to the clutch packs causes delayed engagement or slipping during acceleration. Search query: “transmission gear slipping when accelerating ZF”.
• Whining noise from differential area: Starvation of the 0750117075: TAPER ROLLER BEARING produces a high-pitched whine that increases with speed. Search query: “whining noise from ZF differential bearing”.
• Overheating transmission fluid: A blocked tube reduces oil circulation, causing the fluid to exceed normal operating temperatures. Search query: “transmission overheating ZF construction machinery”.

Technical Specifications

Compatibility

This lubrication tube is primarily used in ZF WG180, WG200, and WG310 series transmissions found in construction machinery such as wheel loaders, telehandlers, and graders. It also fits select ZF 4WG-200 and 6WG-200 variants. Always verify the tube routing against the 5838300626: DIFFERENTIAL HOUSING to ensure correct alignment with the oil galleries.

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