ZF 4699.109.085 BRAKE | OEM Genuine Part

Overview

This OEM genuine ZF 4699.109.085 BRAKE is a critical safety and control component designed for heavy-duty construction machinery transmissions. Located within the transmission housing assembly, this brake unit provides precise stopping force and torque holding capability for the driveline. The SKU 4699.109.085 is engineered to interface directly with the HOUSING and the OUTPUT shaft assembly, ensuring reliable deceleration during operation. As a genuine ZF part, it meets strict OEM tolerances for friction material and hydraulic actuation, making it essential for maintaining original equipment performance in excavators, wheel loaders, and other off-highway vehicles.

Symptoms of Failure

• Transmission brake slipping under load – When the 4699.109.085 brake wears, operators may notice the machine creeping or failing to hold position on inclines, especially during digging or lifting cycles.
• Hydraulic oil leaks near the brake housing – Worn seals or piston damage in this brake unit often cause visible oil seepage around the transmission case, leading to low fluid levels and overheating.
• Delayed or incomplete stopping response – A failing brake may require increased pedal force or exhibit a spongy feel, with the vehicle taking longer to halt than normal.
• Unusual grinding or squealing noises – Metal-on-metal contact from worn friction plates produces distinct audible warnings, often accompanied by vibration in the driveline.

Technical Specifications

Compatibility

This brake unit is primarily used in ZF WG series powershift transmissions commonly found in construction machinery. Compatible models include the WG180, WG200, and WG210 series. It also fits select variants of the WG160 and WG250 transmissions. The part integrates with the INPUT shaft assembly and the GK10 clutch pack to provide coordinated braking and gear engagement. Always verify your transmission serial number against ZF application charts before ordering.

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