Overview
The ZF 4699.109.013 BRAKE is a critical OEM genuine friction component engineered for heavy-duty construction machinery transmissions. Positioned within the planetary gearset assembly, this brake component provides the stopping force required to hold or decelerate rotating shafts under extreme load conditions. The SKU 4699.109.013 is designed to interface directly with the transmission housing, ensuring precise alignment and consistent clamping pressure. When installed alongside the 4699101093: HOUSING, this brake assembly maintains the structural integrity needed for high-torque applications in wheel loaders, graders, and dozers.
Symptoms of Failure
- Transmission brake slipping under load: When the 4699.109.013 wears thin, operators may notice the machine creeping forward or backward on inclines despite full brake application.
- Oil contamination from brake debris: Worn friction material can break free and circulate through the hydraulic system, causing valve sticking and filter plugging.
- Erratic engagement or delayed stopping: A failing brake often produces a soft pedal feel or requires increased travel distance before the machine halts.
- Audible grinding or squealing noises: Metal-to-metal contact from worn linings generates high-pitched sounds during brake activation, indicating imminent failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4699.109.013 |
| Material | Sintered bronze friction lining on steel core |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness | 4.5 mm (new) |
| Weight | 0.85 kg |
| OEM Reference | ZF 4699.109.013 |
Compatibility
This brake component is primarily used in ZF WG180, WG200, and WG310 series powershift transmissions found in construction machinery. It also fits select 4WG-200 and 6WG-200 models from the 1990s through current production. For proper installation, ensure the 4699301175: HOUSING and 4699301041: COVER are free of scoring or warpage. Always replace the 0634303936: O-RING during reassembly to prevent external leaks at the brake piston seal.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101093 | HOUSING | Encloses brake pack and provides mounting points |
| 4699301175 | HOUSING | Intermediate housing for clutch/brake assembly |
| 4699301041 | COVER | Seals the brake chamber and retains hydraulic pressure |
| 0634303936 | O-RING | Prevents fluid bypass around brake piston |
| 0630513203 | SNAP RING | Secures brake pack axial position |
| 0750110302 | SHAFT SEAL | Prevents oil migration along rotating shaft |
| 0630513073 | SNAP RING | Retains cover plate in housing bore |
| 0501319149 | SCREW PLUG | Closes test port in housing |
| 0636302022 | SCREW PLUG | Seals drain hole in brake cavity |
| 0634801038 | SEALING RING | Provides static seal under screw plug |
