ZF 4646.109.410 PARKING BRAKE for WG250 | OEM Genuine Part

Overview

The ZF 4646.109.410 PARKING BRAKE is a critical safety and holding component engineered specifically for the WG 250 Series transmission. This OEM genuine part engages the output shaft to secure the vehicle when stationary, preventing unintended movement on inclines or during loading operations. Positioned within the rear housing assembly, the parking brake mechanism interfaces directly with the TRANSMISSION HOUSING to ensure reliable lock-up. The SKU 4646.109.410 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life in heavy-duty industrial applications.

Symptoms of Failure

• Vehicle roll-back on slopes: When the parking brake fails to hold, the vehicle may creep or roll on inclines, indicating worn friction surfaces or broken internal springs within the 4646.109.410 assembly.
• Grinding or screeching noises during engagement: A high-pitched metallic sound when applying the parking brake suggests the brake lining has worn down to the rivets or the drum surface is scored.
• Inability to disengage the parking brake: If the lever or actuator feels stuck and the transmission remains locked, the internal release mechanism or return springs inside the 4646.109.410 may be seized or corroded.
• Oil contamination around the brake area: Leaking fluid from the HEXAGON SCREW or HOUSING seals can migrate into the brake drum, reducing friction and causing erratic holding performance.

Technical Specifications

Compatibility

This parking brake is primarily designed for the ZF WG 250 Series transmission. Based on its construction and mounting interface, the 4646.109.410 is also compatible with the WG 180, WG 200, and WG 300 series models that share the same rear housing architecture. It is commonly used in forklifts, reach stackers, and heavy-duty material handling equipment. Always verify fitment by cross-referencing the COVER and housing configuration on your specific unit.

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