Overview
The ZF 2095.128.007 SERVICE BRAKE is a critical OEM genuine component engineered for the internal braking system within ZF heavy-duty powershift transmissions. This service brake assembly functions as a friction-based retardation mechanism, mounted directly on the output shaft to provide controlled deceleration and stationary holding torque for construction machinery. As an integral part of the driveline, it works in concert with the DIFF.HOUSING to manage rotational energy. The SKU 2095.128.007 is specifically designed to meet ZF’s original tolerances, ensuring consistent clamping force and thermal stability under extreme loads.
Symptoms of Failure
- Delayed or incomplete stopping: When the service brake wears, operators experience a noticeable lag between pedal application and machine deceleration, often accompanied by a spongy pedal feel.
- Oil contamination in brake chamber: Worn seals allow transmission fluid to bypass into the brake housing, causing a milky oil appearance and reduced friction coefficient.
- High-pitched squealing during braking: Metal-on-metal contact from worn friction plates produces a distinct squeal, especially under partial load, indicating imminent failure.
- Gradual gear slippage on inclines: A failing service brake cannot hold the output shaft stationary, leading to unintended machine rollback on slopes even when the transmission is in gear.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 2095.128.007 |
| Material | Sintered bronze friction lining on steel core |
| Outer Diameter | 198 mm (7.80 in) |
| Inner Diameter | 142 mm (5.59 in) |
| Thickness (new) | 6.5 mm (0.256 in) |
| Weight | 1.42 kg (3.13 lb) |
| Operating Torque Capacity | 850 Nm (627 lb-ft) |
| OEM Reference | ZF 2095.128.007 |
Compatibility
This service brake is primarily compatible with ZF WG180, WG200, and WG210 series powershift transmissions commonly used in wheel loaders, graders, and telescopic handlers. It also fits select variants of the ZF 4WG-200 and 6WG-200 drivelines. The part interfaces directly with the DIFFERENTIAL assembly and the DIFFERENTIAL unit on the opposite side. For proper installation, ensure the TAPER ROLLER BEARING is inspected for wear, as bearing play directly affects brake alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2095109020 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on output shaft |
| 2095209037 | DIFFERENTIAL | Secondary torque distribution unit |
| 2095309059 | DIFF.HOUSING | Encloses differential gears and bearings |
| 0631329086 | SPRING PIN | Secures brake piston alignment |
| 0730300820 | THRUST WASHER | Controls axial clearance in brake stack |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2095309081 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Reduces friction in planetary gearset |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Mesh with axle bevel gear for rotation |
