ZF 4699.173.005 STEERING GEAR for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4699.173.005 STEERING GEAR is a precision-machined component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part controls the directional flow of hydraulic fluid within the steering circuit, directly translating operator input into smooth, responsive vehicle movement. As a critical element in the power steering system, the 4699.173.005 interfaces with the 4699101065 HOUSING to maintain proper alignment and pressure regulation. The SKU 4699.173.005 is manufactured to ZF’s exacting tolerances, ensuring consistent performance in heavy-duty industrial applications.

Symptoms of Failure

• Erratic steering response or “jerky” wheel movement: When the 4699.173.005 wears internally, operators may notice hesitation or sudden lurching during turns, especially at low speeds.
• Hydraulic fluid contamination: Metal shavings or debris in the steering reservoir often indicate internal degradation of this gear, leading to accelerated wear on the 4699103026 OUTPUT shaft.
• Persistent oil leaks near the steering column: Worn seals on the 4699.173.005 allow fluid to escape, leaving visible puddles under the transmission housing.
• Increased steering effort or “stiff” wheel: A failing gear reduces hydraulic assist, requiring significantly more force to turn the wheel, particularly when stationary.

Technical Specifications

Compatibility

This steering gear is specifically designed for ZF WG100, WG130, and WG131 transmissions. It also fits select WG180 and WG200 models when used with the appropriate 4699102082 INPUT adapter. For optimal performance, always pair the 4699.173.005 with the 4699004017 GK25 gear kit, which includes matched shims and bearings. Verify your transmission’s serial number before ordering, as late-model WG131 units may require a different output configuration.

Related Components