ZF 4699.109.077 BRAKE | OEM Genuine Part

Overview

The ZF 4699.109.077 BRAKE is a critical OEM genuine component designed to deliver precise stopping power and load-holding capability within ZF heavy-duty transmission assemblies. This brake unit functions as a primary friction element, engaging directly with the transmission’s rotating drum to control output speed and secure the driveline during stationary operation. As a wear-sensitive part, the 4699.109.077 ensures that hydraulic pressure is reliably converted into mechanical clamping force. When paired with the 4699001162: GK10LD gear kit, this brake assembly maintains the integrity of the power flow in demanding construction machinery applications. The SKU 4699.109.077 is engineered to ZF’s exacting tolerances, making it a direct-fit replacement that restores factory performance without modification.

Symptoms of Failure

• Gradual loss of holding torque on inclines – When the brake fails to lock the output shaft, the machine may creep or roll on slopes, indicating worn friction surfaces.
• Delayed engagement or “soft” braking – Operators may notice increased pedal travel or a spongy feel before the brake fully engages, often caused by internal seal degradation.
• Oil contamination in the brake housing – Leaking seals allow transmission fluid to mix with brake debris, resulting in dark, gritty oil and reduced braking efficiency.
• Intermittent gear slipping under load – A failing brake can cause momentary loss of torque transfer, particularly when the machine is under heavy strain during excavation or lifting.

Technical Specifications

Compatibility

This brake is primarily used in ZF’s WG series powershift transmissions, specifically the WG180, WG200, and WG210 models. It is also found in certain variants of the 4WG-200 and 5WG-210 series used in wheel loaders, telehandlers, and excavators. The 4699.109.077 interfaces directly with the 4699101108: HOUSING and the 4699102172: INPUT shaft assembly. For complete driveline restoration, verify that the 4699103058: OUTPUT shaft and related seals are also inspected during replacement.

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