Overview
The ZF 4699.109.108 BRAKE PARTS component is a critical friction and actuation assembly designed for integration within heavy-duty construction machinery transmissions. This OEM genuine part functions as the primary stopping mechanism, engaging directly with the rotating drum to decelerate output shafts under high torque loads. Positioned within the hydraulic control circuit of the transmission housing, the 4699.109.108 ensures reliable braking force during loader, dozer, and excavator operations. The SKU 4699.109.108 is manufactured to exact ZF tolerances, guaranteeing a direct fit without modification. For proper sealing and alignment, this brake assembly works in conjunction with the 4699101153: HOUSING and the 4699301250: HOUSING, which provide the structural enclosure for the brake pack.
Symptoms of Failure
- Delayed stopping or brake fade: When the 4699.109.108 wears, operators notice a significant lag between pedal input and machine deceleration, often requiring increased pedal travel to halt the vehicle.
- Transmission oil contamination: Worn brake linings shed particulate debris into the hydraulic fluid, causing darkening or a burnt smell in the oil, which can clog filters and degrade valve performance.
- Intermittent gear slipping under load: A failing brake assembly fails to hold the output shaft stationary during park or neutral, leading to unintended machine creep on inclines or during bucket loading cycles.
- Audible grinding or chattering: Metal-on-metal contact from worn friction discs produces a distinct grinding noise during braking, indicating imminent total brake failure.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4699.109.108 |
| OEM Reference | ZF 4699.109.108 |
| Material | Sintered bronze friction lining on steel core |
| Outer Diameter | 180 mm (7.09 in) |
| Inner Diameter | 120 mm (4.72 in) |
| Thickness | 4.5 mm (0.177 in) |
| Weight | 0.85 kg (1.87 lbs) |
Compatibility
This brake component is engineered for ZF WG series powershift transmissions commonly deployed in construction machinery. It is directly compatible with the following ZF transmission models: WG180, WG200, WG210, and WG240. These units are found in loaders, graders, and material handlers from manufacturers such as Caterpillar, Volvo, and Case. The 4699.109.108 also fits select ZF 4WG-200 and 6WG-200 variants. For complete assembly, ensure the 4699309121: HOUSING COVER is installed to protect the brake pack from debris, and secure all fasteners using the 0636101411: CAP SCREW to maintain proper clamping force.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101153 | HOUSING | Encloses brake assembly and supports shaft bearings |
| 4699301250 | HOUSING | Secondary housing for clutch and brake packs |
| 4699309121 | HOUSING COVER | Seals the brake cavity and prevents contamination |
| 0636101411 | CAP SCREW | High-tensile fastener for housing attachment |
| 0631302072 | CYLINDRICAL PIN | Alignment pin for precise housing positioning |
| 0636302013 | SCREW PLUG | Seals oil passages in the transmission housing |
| 0501331653 | SCREW PLUG | Drain or fill plug for hydraulic circuits |
| 0634801038 | SEALING RING | Prevents fluid leaks at housing joints |
| 0637885613 | BREATHER | Equalizes pressure and vents moisture from housing |
| 0769100082 | TYPE PLATE | Identification plate for transmission model and serial |
