ZF 0635.300.373 NEEDLE CAGE | OEM Genuine Part

Overview

The ZF 0635.300.373 NEEDLE CAGE is an OEM genuine component engineered to maintain precise roller alignment within the planetary gear sets of heavy-duty construction machinery transmissions. This needle cage sits directly between the sun gear and planetary gears, ensuring even load distribution and reducing frictional heat during high-torque operations. As part number 0635.300.373, it is a critical wear item that supports the axial and radial stability of the gear train. In the same assembly, the 2099109002 DIFFERENTIAL and 2099364014 CROWN WHEEL rely on this cage to prevent gear misalignment under extreme loads.

Symptoms of Failure

• Whining or grinding noise from the transmission housing – A worn needle cage allows rollers to skew, creating metallic contact during gear engagement.
• Intermittent gear slipping under load – When the cage loses its structural integrity, planetary gears can momentarily lose mesh, causing power loss during excavation or grading.
• Metal debris in transmission oil – Flaking or fractured cage material contaminates the lubricant, accelerating wear on adjacent components like the 2099209001 DIFFERENTIAL.
• Vibration during low-speed operation – Uneven roller spacing induces harmonic vibrations that can crack the 2098309010 DIFFERENTIAL HOUSING over time.

Technical Specifications

Compatibility

This needle cage is designed for ZF WG180, WG200, and WG211 series transmissions commonly found in wheel loaders, excavators, and telehandlers. It also fits select ZF 4WG-310 and 6WG-260 power shift transmissions used in construction machinery. For differential-side applications, verify fitment with the 2098309009 DIFFERENTIAL HOUSING and 2098309031 AXLE BEVEL GEAR.

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