ZF 0730.063.026 RING | OEM Genuine Part

Overview

The ZF 0730.063.026 RING is a precision-engineered OEM genuine component designed to function as a critical sealing and spacing element within the hydraulic control circuits of heavy-duty ZF transmissions. Positioned inside the valve body or clutch housing assembly, this ring ensures proper fluid channel isolation and maintains necessary backpressure for smooth gear engagement. The SKU 0730.063.026 is manufactured to exacting OEM tolerances, making it a direct replacement for worn or deformed rings in construction machinery transmissions. When installed alongside a 4143101009: HOUSING or a 4143301025: HOUSING, this ring completes the hydraulic seal assembly, preventing cross-port leakage that can degrade shift quality.

Symptoms of Failure

When the ZF 0730.063.026 RING wears out, operators and technicians will notice specific performance degradation. Common failure symptoms include:

• Erratic or delayed gear engagement – Worn rings allow hydraulic fluid to bypass, causing soft shifts or hesitation when moving from neutral to drive.
• Internal transmission oil leaks – A compromised ring can lead to fluid migration between circuits, resulting in visible seepage around the valve body or housing mating surfaces.
• Inconsistent clutch pack pressure – Loss of sealing integrity causes pressure fluctuations, leading to shuddering or slipping under load, especially in low-range gears.
• Overheating due to hydraulic inefficiency – Continuous fluid bypass generates excess heat, which may trigger thermal warnings or accelerate degradation of seals like the 0634313603: O-RING.

Technical Specifications

Compatibility

This ring is primarily compatible with ZF heavy-duty powershift transmissions used in construction machinery. Based on its design and dimensions, it is commonly found in the following ZF transmission models:

• WG180 – Widely used in wheel loaders and graders.
• WG200 – Found in medium-sized excavators and dozers.
• WG310 – Applied in larger articulated dump trucks.
• WG160 – Used in compact construction equipment.

Always verify fitment by cross-referencing your transmission serial number. For complete sealing integrity, consider replacing the 4475280018: SCREW PLUG and associated O-rings during service.

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