ZF 0630.003.007 WASHER | OEM Genuine Part

Overview

The ZF 0630.003.007 WASHER is a precision-engineered OEM genuine component designed to function as a critical sealing and load-distribution interface within heavy-duty construction machinery transmissions. This hardened steel washer sits between the transmission housing and hydraulic control units, preventing fluid bypass and maintaining correct axial clearance. As part number 0630.003.007, it ensures that mating surfaces remain properly aligned under high torque loads. When installed alongside the 4143101009: HOUSING and 4143301025: HOUSING, this washer creates a leak-proof seal that is essential for maintaining consistent hydraulic pressure in ZF powertrains.

Symptoms of Failure

• Hydraulic oil seepage around transmission flanges — A worn or deformed 0630.003.007 washer allows pressurized ATF to escape, leaving visible wet spots on the housing exterior. This is a common long-tail search query for “ZF transmission oil leak at housing joint.”
• Intermittent gear engagement hesitation — When the washer loses its thickness tolerance, clutch pack clearance increases, causing delayed shifts or “gear hunting” under load. Search terms like “ZF transmission slipping when hot” often trace back to this part.
• Abnormal metallic debris in transmission fluid — A fractured washer sheds microscopic steel particles into the oil circuit, which can be detected during routine fluid analysis. This symptom aligns with searches for “metal shavings in ZF transmission pan.”
• Reduced hydraulic pressure at test ports — Internal leakage past a failed washer drops system pressure by 15-25%, triggering warning codes on construction machinery dashboards.

Technical Specifications

Compatibility

This washer is a standard component in ZF WG-series powershift transmissions commonly used in wheel loaders, graders, and excavators. It is directly compatible with ZF WG180, WG200, and WG210 models. The 0630.003.007 also appears in select ZF 4WG-200 and 6WG-200 variants. For proper sealing, always replace the 0634313603: O-RING and 4475280018: SCREW PLUG simultaneously, as these components work together in the same hydraulic circuit.

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