ZF 0730.301.123 WASHER | OEM Genuine Part

Overview

The ZF 0730.301.123 WASHER is a precision-engineered OEM genuine component designed for heavy-duty construction machinery transmissions. This hardened steel washer functions as a critical thrust or shim element within the planetary gearset and main shaft assembly, ensuring correct axial clearance and load distribution during high-torque operation. The SKU 0730.301.123 is specifically positioned between rotating shafts and stationary housings to prevent metal-on-metal contact, reducing friction and extending transmission life. As an authentic ZF part, it meets exact factory tolerances for reliable performance in demanding earthmoving and material handling equipment.

Symptoms of Failure

• Transmission oil leaks at the main shaft seal: When the 0730.301.123 washer wears thin, excessive axial play allows the main shaft to shift, damaging the seal and causing fluid seepage.
• Gear slipping under load: A degraded washer reduces clamping force on the gearset, leading to intermittent power loss during digging or lifting operations.
• Metallic grinding noise from the transmission housing: Worn washer material allows direct contact between the MAIN SHAFT and housing, producing audible debris and vibration.
• Hard shifting or gear engagement delay: Incorrect axial clearance from a collapsed washer prevents proper alignment of the SHIFT SYSTEM, causing sluggish or incomplete gear changes.

Technical Specifications

Compatibility

This washer is engineered for ZF WG-series powershift transmissions commonly used in construction machinery. It is a direct fit for the following models: WG180, WG200, WG210, WG240, and WG250. The 0730.301.123 is also compatible with ZF 4WG-180 and 4WG-200 series, where it supports the main shaft assembly alongside the MAIN SHAFT and GEARSHIFT SHAFT. Always verify your transmission serial number before ordering.

Related Components

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