ZF 4651.109.404 PARKING BRAKE for WG100 | OEM Genuine Part

Overview

The ZF 4651.109.404 PARKING BRAKE is a critical safety and holding component engineered specifically for the WG 100 Series transmission. This OEM genuine part engages mechanically to lock the output shaft, preventing vehicle roll-away when parked or during stationary operation. Located within the rear section of the transmission assembly, it interfaces directly with the 4651101005: TRANSMISSION HOUSING to ensure secure engagement. The SKU 4651.109.404 is manufactured to ZF’s exacting tolerances, guaranteeing reliable performance in heavy-duty industrial applications.

Symptoms of Failure

• Intermittent parking brake release or failure to hold on inclines: When the internal friction discs or actuation mechanism wear, the brake may slip, causing the vehicle to creep even when engaged.
• Grinding or clunking noise during engagement: Worn components within the 4651.109.404 assembly can produce metallic sounds, indicating damaged splines or seized pistons.
• Oil leaks near the rear transmission flange: Degraded seals in the parking brake unit allow transmission fluid to escape, often visible as drips around the 0634303928: O-RING interface.
• Increased pedal or lever travel before brake locks: Excessive clearance from worn linings or stretched springs reduces engagement force, requiring more operator input.

Technical Specifications

Compatibility

This parking brake is primarily designed for the ZF WG 100 Series transmissions, including models WG100, WG120, and WG150. It is also compatible with the WG180 and WG200 series when used with the appropriate 4651301010: HOUSING adapter. For applications requiring a different mounting configuration, verify fitment with the 4651301017: HOUSING variant. Always confirm your transmission serial number before ordering.

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