ZF 0501.217.373 MOTOR

Overview

The ZF 0501.217.373 MOTOR is a critical OEM genuine hydraulic drive component engineered for demanding construction machinery transmissions. This motor converts hydraulic pressure into mechanical torque to engage clutch packs and shift gears within the transmission housing. As an integral part of the valve body assembly, the 0501.217.373 ensures precise oil flow control for smooth power delivery under heavy loads. The SKU 0501.217.373 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in wheel loaders, graders, and other off-highway equipment. When installed alongside the 4699101046: HOUSING and 4699301109: HOUSING, this motor forms a sealed hydraulic circuit that prevents cross-contamination between transmission sections.

Symptoms of Failure

• Delayed or harsh gear engagement — A failing 0501.217.373 motor cannot build adequate hydraulic pressure, causing noticeable lag when shifting from neutral to drive or reverse in ZF transmissions.
• Intermittent transmission slippage under load — Worn internal seals or spool wear in this motor leads to pressure loss, resulting in clutch slip during heavy excavation or grading operations.
• External hydraulic fluid leaks — Cracks or seal degradation on the motor body produce visible oil seepage around the mounting flange, often requiring replacement of the 4699301017: BEARING COVER and 4699301085: COVER simultaneously.
• Erratic shift patterns or transmission overheating — A stuck or sluggish motor spool causes continuous oil bypass, generating excess heat and erratic shift quality that worsens over time.

Technical Specifications

Compatibility

This OEM genuine motor is designed for use in ZF WG series powershift transmissions commonly found in construction machinery. It directly fits the following transmission models: WG180, WG200, WG210, and WG250. The 0501.217.373 is also compatible with select ZF ERGOPOWER and ECOMIX transmissions used in wheel loaders and telehandlers. For proper installation, always inspect the mating 4699101046: HOUSING for wear and replace the 4699301109: HOUSING if scoring is present. The 4699301017: BEARING COVER and 4699301085: COVER should be torqued to factory specifications to prevent fluid bypass.

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