ZF 4143.135.416 SPUR GEAR DRIVE for WG100/WG130/WG131 | OEM Genuine Part

Overview

The ZF 4143.135.416 SPUR GEAR DRIVE is a precision-machined gear component designed for the auxiliary power take-off (PTO) section of ZF WG100, WG130, and WG131 transmissions. This genuine OEM part transfers rotational torque from the transmission’s internal shaft system to the output flange, enabling reliable hydraulic pump or auxiliary equipment operation. The SKU 4143.135.416 is engineered with case-hardened steel to withstand continuous high-load cycles. It sits directly within the gear train assembly, meshing with the countershaft and supported by the 4143101016: HOUSING and 4143301039: HOUSING, which provide structural alignment and oil retention.

Symptoms of Failure

• Whining or grinding noise during PTO engagement – Worn gear teeth create irregular contact patterns, producing a distinct metallic sound when the auxiliary drive is under load.
• Intermittent gear slipping under heavy torque – As the spur gear’s tooth profile degrades, the drive loses positive engagement, causing momentary power loss to hydraulic pumps or winches.
• Metallic debris in transmission oil filter – Flaking or pitting on the gear surface sheds fine steel particles, which accumulate in the sump and reduce overall transmission life.
• Oil seepage around the PTO housing joint – Excessive gear vibration can loosen the 0636101084: CAP SCREW fasteners, compromising the seal provided by the 0501318136: GASKET.

Technical Specifications

Compatibility

This spur gear drive is engineered for ZF’s WG-series transmissions with auxiliary PTO capability. Verified direct fitment includes WG100, WG130, and WG131 models. It is also commonly used in WG180, WG200, and WG210 variants where the PTO gear train shares the same tooth profile and shaft center distance. Always confirm the gear count and shaft spline configuration against your transmission’s service manual before installation.

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