ZF 0730.301.884 RING | OEM Genuine Part

Overview

The ZF 0730.301.884 RING is a precision-engineered OEM genuine component designed for heavy-duty construction machinery transmissions. This ring functions as a critical sealing and spacing element within the planetary gear set or clutch pack assembly, ensuring proper hydraulic pressure retention and component alignment. The SKU 0730.301.884 identifies this specific hardened steel ring, which sits between rotating shafts and stationary housings to prevent fluid bypass and maintain torque transfer efficiency. Without this ring, the transmission cannot sustain the necessary oil film for cooling and lubrication of adjacent gears.

Symptoms of Failure

When the 0730.301.884 ring wears out, operators typically notice these specific failure modes:

• Delayed gear engagement – The ring loses its sealing ability, causing low clutch pressure and sluggish shifting, especially when cold.
• Internal transmission oil leaks – Worn rings allow pressurized oil to escape past the piston seals, leading to visible drips from the bell housing or cooler lines.
• Erratic torque converter lockup – A failing ring disrupts the balance between hydraulic circuits, causing shuddering or failure to lock the converter.
• Metallic debris in oil pan – As the ring surface degrades, fine steel particles contaminate the fluid, accelerating wear on the 4143101009 HOUSING and valve body components.

Technical Specifications

Compatibility

This ring is designed for ZF power-shift transmissions commonly used in wheel loaders, graders, and excavators. It is a direct fit for the following models:

• ZF WG180 series (all variants)
• ZF WG200 series (including WG200/5 and WG200/6)
• ZF WG210 series (early production)
• ZF 4WG-200 and 4WG-210 torque converter transmissions

During installation, always inspect the mating surfaces of the 4143301025 HOUSING for scoring. Replace the 0634313603 O-RING simultaneously to ensure a leak-free seal. The 4475280018 SCREW PLUG should also be torqued to factory specifications to prevent housing distortion.

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