Overview
The ZF 5838.300.480 BRAKE LINE is a critical hydraulic conduit within the final drive assembly of heavy-duty construction machinery transmissions. This OEM genuine part channels pressurized brake fluid from the control valve directly to the brake piston, ensuring precise engagement and disengagement of the parking or service brake system. Located within the axle housing, the brake line (SKU 5838.300.480) must withstand high cyclic pressures and corrosive environments. When paired with a properly functioning 5838022003: REAR AXLE, this component ensures reliable stopping power under extreme loads.
Symptoms of Failure
- External hydraulic fluid seepage near the axle housing: A cracked or corroded brake line will allow ATF or hydraulic oil to drip, leaving visible puddles under the machine after shutdown.
- Spongy or delayed brake pedal response: Air ingress through a compromised line reduces hydraulic pressure, causing the brake to engage only after excessive pedal travel.
- Intermittent brake drag or overheating: A partially blocked or kinked line prevents full release of the brake piston, leading to constant friction and elevated hub temperatures.
- Complete loss of parking brake function: A ruptured line results in zero hydraulic pressure to the brake piston, making the machine unable to hold position on inclines.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.300.480 |
| Material | Seamless cold-drawn steel tube, zinc-nickel plated |
| Length (overall) | 480 mm ± 2 mm |
| Tube Outer Diameter | 8.0 mm |
| Wall Thickness | 1.0 mm |
| Weight | 0.18 kg |
| OEM Reference | ZF 5838.300.480 |
| Thread Type | M10 x 1.0 (both ends) |
| Max Working Pressure | 120 bar |
Compatibility
This brake line is engineered for ZF’s WG series powershift transmissions commonly used in wheel loaders, graders, and telehandlers. It is a direct fit for the WG180, WG200, and WG210 models. The line interfaces directly with the 5838109001: DIFFERENTIAL housing and the 5838300128: DIFFERENTIAL HOUSING assembly. For proper installation, ensure the 0750117075: TAPER ROLLER BEARING is correctly seated to avoid misalignment of the line.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838022003 | REAR AXLE | Houses final drive gears and brake assembly |
| 5838109001 | DIFFERENTIAL | Distributes torque between wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axle shaft radial and axial loads |
| 5838300128 | DIFFERENTIAL HOUSING | Encloses differential gear set |
| 0631329086 | SPRING PIN | Secures brake line bracket to housing |
| 5838300129 | THRUST WASHER | Controls axial play in differential |
| 5838300130 | THRUST WASHER | Controls axial play in differential |
| 5838300131 | AXLE BEVEL GEAR | Transfers power to wheel hub |
| 5838300132 | COMPENS. STUB AXLE | Supports compensation gear |
| 5838300133 | COMPENS. STUB AXLE | Supports compensation gear |
