ZF 4699.170.121 MOTOR | OEM Genuine Part

Overview

The ZF 4699.170.121 MOTOR is a critical hydraulic drive component engineered for heavy-duty construction machinery transmissions. As an OEM genuine part, this motor converts hydraulic pressure into mechanical torque to drive the transmission’s pump system, ensuring consistent power delivery under extreme loads. Positioned within the transmission housing assembly, it directly interfaces with the 4699101105 HOUSING to maintain sealed fluid flow. The SKU 4699.170.121 is precision-machined to ZF’s original tolerances, making it essential for maintaining factory-specified performance in wheel loaders, graders, and other off-highway equipment.

Symptoms of Failure

• Intermittent transmission slipping under load: A worn motor often fails to maintain hydraulic pressure, causing the transmission to momentarily lose torque during heavy lifting or climbing operations.
• Visible hydraulic fluid seepage around the motor mounting flange: Degraded seals allow oil to escape, often pooling near the 0501329881 HOUSING COVER interface.
• Erratic or delayed gear engagement: Reduced motor efficiency leads to sluggish shift response, particularly when transitioning from neutral to forward or reverse.
• Abnormal whining or grinding noises from the transmission pump area: Internal bearing wear within the motor creates metallic sounds that intensify with engine RPM.

Technical Specifications

Compatibility

This motor is designed for ZF’s WG series powershift transmissions commonly found in construction machinery. It is a direct fit for the WG180, WG200, and WG250 models, as well as select variants of the WG310 series. The part also integrates with the 0637885612 BREATHER to equalize pressure within the housing. Always verify your transmission model’s serial number against the OEM parts catalog before installation.

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