ZF 4699.170.218 MOTOR | OEM Genuine Part

Overview

The ZF 4699.170.218 MOTOR is a critical hydraulic drive component engineered for demanding construction machinery transmissions. This OEM genuine part converts hydraulic pressure into mechanical torque, directly engaging the transmission’s internal gear train to facilitate smooth power transfer. Positioned within the valve body assembly, the motor actuates clutch packs and shift mechanisms, ensuring precise gear engagement under heavy loads. The SKU 4699.170.218 is specifically designed to withstand high cyclic pressures and thermal stress, making it indispensable for maintaining operational uptime in excavators, wheel loaders, and graders. When paired with the 4699025039 GP25 pump, this motor forms the core of the transmission’s hydraulic control loop.

Symptoms of Failure

• Intermittent gear slipping under load: A worn 4699.170.218 motor fails to maintain consistent hydraulic pressure, causing the transmission to slip during heavy digging or lifting operations.
• Delayed or harsh shifting: Reduced motor efficiency leads to sluggish clutch engagement, often accompanied by audible clunking when transitioning between forward and reverse gears.
• Hydraulic fluid contamination: Internal seal degradation allows metal debris to circulate, visible as dark particles in the oil filter or sump magnet.
• Overheating transmission oil: A failing motor creates excessive internal friction, raising operating temperatures beyond 100°C and triggering warning alarms on the dash.

Technical Specifications

Compatibility

This motor is engineered for ZF’s heavy-duty powershift transmissions commonly used in construction machinery. It is directly compatible with the WG180, WG200, and WG250 series, as well as the ERGOpower 8-speed models. The 4699.170.218 integrates seamlessly with the 4699101113 HOUSING assembly, which encloses the motor’s rotor and stator. For complete driveline restoration, technicians should also inspect the 4699102157 INPUT shaft and 4699103114 OUTPUT flange, as wear on these components accelerates motor failure.

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