ZF 4699.109.083 BRAKE | OEM Genuine Part

Overview

The ZF 4699.109.083 BRAKE is a critical OEM genuine component designed to manage torque hold and release within ZF heavy-duty powershift transmissions. This brake assembly directly controls the engagement and disengagement of planetary gear sets, ensuring smooth directional shifts and preventing unintended motion in construction machinery. As a wear-intensive friction component, the SKU 4699.109.083 sits within the transmission’s clutch pack housing, where it interfaces with hydraulic pistons and steel separator plates. When functioning correctly, this brake provides precise stopping power under high load, making it indispensable for wheel loaders, graders, and excavators operating in demanding environments.

Symptoms of Failure

When the ZF 4699.109.083 BRAKE begins to fail, operators will notice distinct performance degradation. Common failure symptoms include:

• Delayed engagement or “slipping” during forward-to-reverse shifts – The brake fails to clamp quickly, causing a lag in directional changes.
• Transmission overheating – Excessive friction from a worn brake generates abnormal heat, often accompanied by burnt oil smell.
• Intermittent loss of drive power – The brake may partially release under load, resulting in momentary power loss on inclines or under heavy bucket loads.
• Hydraulic oil contamination – Worn friction material sheds debris into the transmission fluid, clogging filters and valves.

Technical Specifications

Compatibility

This brake component is engineered for ZF powershift transmission families commonly used in construction machinery. It is directly compatible with the WG180 and WG200 series transmissions. Additionally, it is found in select WG150 and WG250 models where the brake pack configuration matches the 245mm outer diameter. Always verify the spline count and stack height against your transmission’s service manual before installation.

Installation Context

During a rebuild, the 4699.109.083 BRAKE is installed adjacent to the 4699003082: GK20 clutch piston, which actuates the brake pack. The entire assembly is housed within the 4699101097: HOUSING, which must be inspected for wear grooves. Power is transmitted through the 4699102166: INPUT shaft, while the 4699103060: OUTPUT shaft transfers torque to the final drive. Proper alignment of these four components is essential for brake longevity.

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