ZF 4699.109.018 BRAKE PARTS | OEM Genuine Part

Overview

The ZF 4699.109.018 BRAKE PARTS assembly is a critical hydraulic-mechanical component within the final drive section of heavy-duty construction machinery transmissions. This OEM genuine part functions as the primary friction interface for braking torque, converting hydraulic pressure into mechanical stopping force. Positioned between the planetary gear set and the output shaft housing, the 4699.109.018 unit ensures controlled deceleration during load cycles. The SKU 4699.109.018 is precision-engineered to maintain consistent clamping force under extreme thermal stress, directly influencing machine safety and operational uptime. When paired with the 4699101080: HOUSING, this brake assembly forms a sealed pressure chamber that prevents contamination ingress.

Symptoms of Failure

• Erratic braking response or delayed engagement: Worn friction surfaces cause inconsistent hydraulic pressure buildup, leading to unpredictable stopping distances during loader or excavator operation.
• Transmission oil contamination with metallic particles: Degraded brake linings shed ferrous debris into the lubricating circuit, often detected during routine oil analysis as elevated iron content.
• Audible grinding or squealing from the final drive: Metal-on-metal contact occurs when the friction material wears below the minimum thickness threshold, generating high-frequency noise during low-speed maneuvers.
• Hydraulic fluid leaks near the axle housing interface: Compromised sealing surfaces allow pressurized oil to escape past the 0634306309: O-RING, visible as drips or wet spots around the brake chamber.

Technical Specifications

Compatibility

This brake component is engineered for ZF’s WG series powershift transmissions commonly deployed in wheel loaders, dozers, and telehandlers. Verified compatibility includes the WG180, WG200, and WG210 models, where it integrates with the 0501329881: HOUSING COVER to form the brake piston chamber. The 4699.109.018 also fits select WG150 and WG160 variants when used with the correct 0630513065: SNAP RING for axial retention. Always verify spline count and stack height against your transmission’s service manual before installation.

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