ZF 0501.318.782 OUTPUT FLANGE | OEM Genuine Part

Overview

The ZF 0501.318.782 OUTPUT FLANGE is a critical driveline component engineered to transfer rotational torque from the transmission output shaft to the driveshaft in heavy-duty construction machinery. This OEM genuine part sits at the rear of the transmission housing, where it couples the internal gearset to external powertrain elements. The flange ensures precise alignment and secure power delivery under extreme loads. When servicing this assembly, technicians often inspect the adjacent 4143101014: HOUSING and 4143301025: HOUSING for cracks or wear. The SKU 0501.318.782 is machined to exact OEM tolerances, making it a direct replacement for failed units in ZF powershift transmissions.

Symptoms of Failure

• Transmission fluid seepage at the output shaft: A worn flange face or damaged sealing surface allows oil to escape, leaving puddles under the vehicle. This often accompanies a degraded 0634313603: O-RING.
• Driveline vibration during acceleration: Excessive play between the flange splines and output shaft creates rotational imbalance, felt as shuddering in the cab at low speeds.
• Metallic debris in transmission oil: Fretting corrosion on the flange hub sheds particles into the lubricant, detectable during routine oil changes.
• Intermittent loss of power to wheels: A stripped or cracked flange can slip under load, causing momentary disengagement between transmission and driveshaft.

Technical Specifications

Compatibility

This output flange is primarily used in ZF WG180 and WG200 series powershift transmissions, common in wheel loaders, graders, and telehandlers from manufacturers such as Liebherr, Volvo, and Caterpillar. It also fits select WG150 and WG310 variants where the output shaft spline geometry matches. Always verify the spline count and pilot diameter against your existing unit. During installation, replace the 4475280018: SCREW PLUG to prevent thread galling.

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