Overview
The ZF 5838.300.364 BRAKE LINE is a critical hydraulic conduit within the final drive assembly of heavy-duty construction machinery. This OEM genuine part delivers pressurized brake fluid from the transmission control valve directly to the wheel brake actuators, ensuring precise stopping force under extreme loads. Positioned along the axle housing, the 5838.300.364 brake line connects directly to the 5838022003: REAR AXLE assembly and interfaces with the 5838109001: DIFFERENTIAL unit. Manufactured to ZF’s exacting tolerances, this rigid steel line resists corrosion and vibration fatigue, making it essential for maintaining consistent brake system pressure in wheel loaders, graders, and dump trucks.
Symptoms of Failure
- External hydraulic fluid seepage at axle connection points: When the 5838.300.364 brake line develops micro-cracks or fitting wear, you will notice oil weeping around the union where it meets the 5838300128: DIFFERENTIAL HOUSING. This often appears as dark streaks on the axle tube.
- Spongy or delayed brake pedal response: A compromised brake line allows air ingress into the hydraulic circuit, causing the brake pedal to feel soft or require multiple pumps before engagement.
- Uneven braking force between left and right wheels: Restricted flow through a kinked or partially blocked brake line starves one wheel circuit, leading to pulling during stops.
- Visible rust or pitting along the line surface: Exposure to road salt and debris accelerates corrosion, eventually causing pin-hole leaks that result in total brake loss.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 5838.300.364 |
| Material | Seamless cold-drawn steel tube, zinc-nickel plated |
| Length | 485 mm (19.1 in) |
| Outer Diameter | 8.0 mm (0.315 in) |
| Wall Thickness | 1.2 mm (0.047 in) |
| Fitting Thread | M14 x 1.5 (both ends) |
| Weight | 0.18 kg (0.40 lb) |
| OEM Reference | ZF 5838.300.364 |
| Burst Pressure | ≥ 250 bar (3625 psi) |
Compatibility
This brake line is engineered for ZF’s WG series powershift transmissions commonly used in construction machinery. It is a direct fit for the WG180, WG200, and WG210 transmission models. Additionally, it integrates with the ZF 4WG-200 and ZF 6WG-250 drivelines. The line mounts between the brake valve manifold and the wheel cylinder ports on the 5838022003: REAR AXLE housing. Always verify the routing path against your specific axle configuration, as the 0750117075: TAPER ROLLER BEARING preload adjustments may affect line clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838022003 | REAR AXLE | Houses final drive gears and wheel hubs |
| 5838109001 | DIFFERENTIAL | Distributes torque between left/right 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 from pinion to ring gear |
| 5838300132 | COMPENS. STUB AXLE | Supports wheel hub on left side |
| 5838300133 | COMPENS. STUB AXLE | Supports wheel hub on right side |
