Overview
This genuine OEM ZF 4699.109.111 BRAKE PARTS component is a critical internal assembly within heavy-duty construction machinery transmissions. It functions as the primary friction interface for modulating hydraulic pressure during gear shifts, ensuring smooth engagement and disengagement of planetary gear sets. The part number 4699.109.111 is specifically engineered to withstand high thermal loads and repetitive stress cycles. It sits directly within the clutch pack housing, where it interacts with the 4699101153: HOUSING to maintain precise alignment. Without this brake component, the transmission cannot achieve the necessary clamping force for torque transfer.
Symptoms of Failure
- Delayed or harsh engagement: When the brake parts wear, operators notice a pronounced lag or a jarring shift when moving from neutral to drive, often accompanied by a metallic clunk.
- Intermittent gear slipping under load: As friction material degrades, the transmission may momentarily lose power delivery on inclines or during heavy digging cycles, causing RPM flare.
- Contaminated transmission fluid: Worn brake particles shed into the oil, resulting in a dark, gritty appearance and a burnt odor. This accelerates wear on adjacent components like the 0636101411: CAP SCREW and sealing surfaces.
- Audible grinding from the clutch housing: Metal-to-metal contact produces a distinct grinding noise, particularly during low-speed maneuvering, indicating the brake material has been completely depleted.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number (SKU) | 4699.109.111 |
| Material Composition | Sintered bronze friction lining on steel core |
| Outer Diameter | 198 mm (estimated) |
| Inner Diameter | 135 mm (estimated) |
| Thickness (New) | 4.5 mm (estimated) |
| Weight | 0.85 kg (estimated) |
| OEM Reference | ZF 4699.109.111 |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This brake part is designed for integration into ZF’s WG series powershift transmissions commonly found in wheel loaders, graders, and telehandlers. It is compatible with the WG180, WG200, and WG210 model families. The component also fits select 4WG-200 and 6WG-200 variants used in construction machinery from manufacturers such as Caterpillar, Volvo, and Liebherr. For proper installation, ensure the mating 4699301250: HOUSING and 4699309121: HOUSING COVER are free of scoring and warpage.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101153 | HOUSING | Encloses the brake pack and directs oil flow |
| 4699301250 | HOUSING | Secondary housing for clutch support |
| 4699309121 | HOUSING COVER | Seals the assembly and retains pressure |
| 0636101411 | CAP SCREW | Fastens housing sections with precise torque |
| 0631302072 | CYLINDRICAL PIN | Aligns components during assembly |
| 0636302013 | SCREW PLUG | Seals oil passages in the housing |
| 0501331653 | SCREW PLUG | Provides access port for pressure testing |
| 0634801038 | SEALING RING | Prevents fluid bypass at joint interfaces |
| 0637885613 | BREATHER | Equalizes internal pressure and vents moisture |
| 0769100082 | TYPE PLATE | Identifies transmission model and serial number |
