ZF 4663.301.021 OIL FEEDER | OEM Genuine Part

Overview

The ZF 4663.301.021 OIL FEEDER is a critical OEM genuine component engineered for precision lubrication within heavy-duty ZF construction machinery transmissions. This part ensures a consistent flow of hydraulic oil to high-friction zones, reducing thermal stress and preventing premature gear wear. Positioned internally within the transmission housing, the oil feeder directs fluid directly onto rotating assemblies, maintaining optimal operating temperatures. The SKU 4663.301.021 is specifically designed to interface with the 4663101003: HOUSING and the 4663301026: COVER, forming a sealed lubrication circuit that protects downstream components.

Symptoms of Failure

• Intermittent gear slipping under load: A worn oil feeder reduces hydraulic pressure, causing clutches to disengage momentarily during heavy excavation.
• Visible oil seepage near the transmission bell housing: Cracks in the feeder body allow pressurized oil to escape, often mistaken for a failing gasket.
• Overheating transmission fluid: Restricted oil flow from a clogged feeder raises sump temperatures beyond 120°C, triggering warning alarms.
• Erratic shift timing: Inconsistent lubrication disrupts valve body response, leading to delayed or harsh gear engagements.

Technical Specifications

Compatibility

This oil feeder is primarily used in ZF WG180, WG200, and WG211 series transmissions found in wheel loaders, excavators, and graders. It also fits select 4WG-310 and 6WG-260 models manufactured after 2015. For proper installation, ensure the 0631306816: CYLINDRICAL PIN is aligned correctly, and secure the assembly with the 0636100817: CAP SCREW to prevent vibration loosening. Always verify your transmission serial number against the OEM parts catalog before ordering.

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