ZF 0501.339.709 MOTOR | OEM Genuine Part

Overview

The ZF 0501.339.709 MOTOR is a genuine OEM hydraulic motor assembly engineered for integration within ZF’s heavy-duty powershift transmission systems. This component converts hydraulic pressure into mechanical rotational force, directly driving the transmission’s pump and lubrication circuits. Positioned on the transmission housing, it is critical for maintaining oil flow and clutch actuation in construction machinery such as wheel loaders and graders. The SKU 0501.339.709 is a factory-sealed unit, ensuring precise tolerances and long service life under extreme loads. When paired with a compatible HOUSING, this motor forms the core of the hydraulic power take-off assembly.

Symptoms of Failure

• Erratic transmission engagement: A worn motor causes inconsistent hydraulic pressure, leading to delayed or harsh gear shifts—especially noticeable in low-speed maneuvering.
• Oil leaks at the motor seal: Degraded O-rings or shaft seals produce visible drips around the motor mounting flange, often accompanied by a burnt hydraulic fluid smell.
• Reduced machine travel speed: Internal wear reduces motor volumetric efficiency, causing the transmission to lose torque under load, particularly when climbing grades.
• Whining or grinding noises: Metal-to-metal contact from bearing failure generates high-pitched sounds during operation, worsening as hydraulic temperature rises.

Technical Specifications

Compatibility

This motor is designed for ZF’s WG-series powershift transmissions commonly used in construction machinery. It directly fits the WG180 and WG200 series, and is also compatible with the WG150 and WG250 models when used with the correct GP25 adapter plate. The unit interfaces with the INPUT shaft and OUTPUT flange assemblies, ensuring seamless power transfer in loaders, dozers, and excavators.

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