ZF 0730.063.027 RING | OEM Genuine Part

Overview

The ZF 0730.063.027 RING is an OEM genuine sealing component engineered for high-stress planetary gear sets and clutch drum assemblies within heavy-duty construction machinery transmissions. This precision-machined ring, identified by SKU 0730.063.027, sits between the rotating shaft and stationary housing to maintain hydraulic pressure and prevent fluid bypass. It is a critical wear item that ensures consistent lubrication and clutch engagement in ZF power shift transmissions. When paired with a new 4143101009 HOUSING and 4143301025 HOUSING, this ring restores the sealing integrity of the entire assembly.

Symptoms of Failure

• Hydraulic pressure drop under load: A worn 0730.063.027 ring allows internal leakage, causing sluggish gear engagement and reduced torque converter efficiency.
• External oil seepage near the PTO housing: When the ring fails, transmission fluid can escape past the seal, leaving visible drips on the bell housing or under the machine.
• Erratic shifting or clutch slip: Loss of sealing pressure leads to delayed or incomplete clutch pack application, especially in lower gears.
• Overheating transmission fluid: Internal leakage generates excess heat, which may trigger warning lights or cause burnt-smelling fluid.

Technical Specifications

Compatibility

This ring is designed for use in ZF WG series transmissions commonly found in wheel loaders, telehandlers, and excavators. It is a direct fit for the following models:

• ZF WG180
• ZF WG200
• ZF WG210
• ZF WG310

Always verify the part number against your transmission’s parts manual. For complete sealing, replace the 0634313603 O-RING and 4475280018 SCREW PLUG simultaneously to prevent secondary leaks.

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