ZF 5838.300.508 LUBRICATION TUBE | OEM Genuine Part

Overview

The ZF 5838.300.508 LUBRICATION TUBE is a critical fluid delivery component engineered for heavy-duty construction machinery transmissions. This OEM genuine part channels pressurized oil directly to planetary gear sets and bearing assemblies, ensuring consistent thermal regulation and friction reduction during high-torque operations. Positioned within the upper valve body housing of ZF power shift transmissions, the 5838.300.508 tube prevents metal-to-metal contact by maintaining a precise oil film across rotating surfaces. As an original equipment manufacturer component, this lubrication tube guarantees factory-specified flow rates and pressure tolerances, directly impacting transmission longevity in excavators, wheel loaders, and graders.

Symptoms of Failure

• Transmission overheating under load – A cracked or blocked 5838.300.508 tube restricts oil flow, causing localized hot spots that trigger thermal warnings during extended grading or digging cycles.
• Intermittent gear slippage in forward gears – Insufficient lubrication to clutch packs due to a deformed tube leads to momentary power loss, particularly when shifting from second to third gear under heavy payloads.
• Visible oil seepage near the valve body cover – Hairline fractures in the tube’s brazed joints produce slow drips that accumulate on the transmission pan, often mistaken for gasket failure.
• Metallic debris in transmission fluid analysis – When the lubrication tube fails to direct oil to the 5838109007: DIFFERENTIAL assembly, accelerated bearing wear generates ferrous particles detectable during routine sampling.

Technical Specifications

Compatibility

This lubrication tube is primarily designed for ZF WG180, WG200, and WG210 power shift transmissions used in construction machinery. It also fits select variants of the ZF 4WG-180 and 4WG-200 series, commonly installed in Caterpillar, Volvo, and Liebherr equipment. When replacing the 5838.300.508, always inspect the 0750117075: TAPER ROLLER BEARING for wear, as inadequate lubrication from a failing tube accelerates bearing raceway damage. Additionally, verify alignment with the 2095209019: DIFFERENTIAL housing to prevent tube distortion during installation. Secure the assembly using a 0631329086: SPRING PIN to lock the tube in position against vibration.

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