ZF 0730.004.473 WASHER for WG250 | OEM Genuine Part

Overview

The ZF 0730.004.473 WASHER for WG250 is a precision-engineered OEM genuine component designed to function as a critical sealing and load-distribution element within the transmission assembly. Positioned between the HOUSING and the COVER, this washer ensures proper axial clearance and prevents metal-to-metal contact under high torque conditions. The SKU 0730.004.473 is manufactured to ZF’s exacting tolerances, guaranteeing a perfect fit in the WG 250 and WG 251 series transmissions. Without this washer, the TRANSMISSION HOUSING may experience uneven stress distribution, leading to premature wear of adjacent components.

Symptoms of Failure

• Transmission oil seepage at the housing joint: A worn or crushed 0730.004.473 washer can no longer maintain a proper seal, allowing hydraulic fluid to escape around the HEXAGON SCREW mounting points.
• Abnormal gear engagement noise: When the washer loses its original thickness, axial play increases, causing the gear train to shift slightly under load, resulting in a distinct clattering sound during shifting.
• Reduced hydraulic pressure in the clutch pack: A deformed washer alters the stack-up height inside the valve body area, leading to sluggish clutch engagement and delayed gear changes.
• Visible fretting or galling on mating surfaces: If the washer disintegrates, metal debris can contaminate the oil, causing scoring on the HOUSING face and requiring a full overhaul.

Technical Specifications

Compatibility

This washer is specifically engineered for the ZF WG 250 and WG 251 series transmissions. It is also compatible with the WG 180 and WG 200 models when used in the same axial location between the TRANSMISSION HOUSING and the COVER assembly. For WG 300 series units, verify the stack-up height before installation, as the 0730.004.473 may require pairing with an additional COVER SHEET to achieve correct preload.

Related Components