Overview
The ZF 5838.124.003 PARKING BRAKE is a critical safety and holding component engineered for heavy-duty construction machinery transmissions. This OEM genuine part integrates directly into the output housing of the transmission assembly, where it applies mechanical clamping force to the driveline to prevent vehicle rollaway when parked or during stationary operation. The SKU 5838.124.003 is designed to interface with the differential housing and axle shafts, ensuring that the braking torque is transmitted reliably through the driveline. When installed alongside a 5838109007: DIFFERENTIAL, this parking brake unit provides the necessary holding capacity for loaders, graders, and other off-highway equipment.
Symptoms of Failure
- Transmission oil leaks near the output flange: Worn seals within the 5838.124.003 assembly allow hydraulic fluid to escape, often visible as drips beneath the parking brake housing.
- Intermittent gear slipping on inclines: A failing parking brake cannot maintain clamping force, causing the machine to creep or roll when parked on a slope.
- Grinding or scraping noises during engagement: Internal friction material degradation produces metallic sounds when the brake is applied, indicating imminent failure.
- Reduced holding torque after extended use: Operators may notice the brake requires higher lever force or fails to hold the vehicle stationary under load.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.124.003 |
| OEM Reference | ZF 5838.124.003 |
| Material | Hardened steel housing with sintered friction lining |
| Weight | 4.2 kg (9.3 lbs) |
| Outer Diameter | 185 mm |
| Inner Diameter | 95 mm |
| Thickness | 42 mm |
| Bolt Pattern | 6 x M12 on 160 mm PCD |
| Max Operating Pressure | 12 bar (174 psi) |
| Temperature Range | -40°C to +120°C |
Compatibility
This parking brake is designed for ZF WG180, WG200, and WG210 series transmissions commonly found in construction machinery such as wheel loaders, backhoes, and telescopic handlers. It also fits select variants of the ZF 4WG-200 and 6WG-200 power shift transmissions. For proper installation, ensure the mating 0750117075: TAPER ROLLER BEARING is in good condition, as bearing wear directly affects brake alignment. Additionally, the 2095209019: DIFFERENTIAL and 0631329086: SPRING PIN are commonly replaced during parking brake service to ensure driveline integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating shaft loads |
| 2095209019 | DIFFERENTIAL | Secondary differential for planetary drives |
| 0631329086 | SPRING PIN | Secures brake actuator linkage |
| 5838300817 | THRUST WASHER | Reduces axial friction in brake hub |
| 5838300682 | DIFFERENTIAL AXLE | Transmits power to wheel ends |
| 5838300811 | THRUST WASHER | Spacer for brake pressure plate |
| 5841302064 | THRUST WASHER | Wear surface for brake piston |
| 5838300137 | OUTER CLUTCH DISK | Friction surface for brake engagement |
| 5838300138 | INNER CLUTCH DISK | Steel reaction plate for brake pack |
