Overview
The ZF 5838.300.224 LUBRICATION TUBE is a precision-engineered OEM genuine component designed to direct pressurized oil flow to critical bearing surfaces and gear meshes within ZF heavy-duty transmissions. Positioned internally within the transmission housing, this tube ensures consistent lubrication delivery to the differential and axle assemblies, preventing metal-on-metal contact during high-torque operations. As a dedicated fluid conduit, the SKU 5838.300.224 maintains proper oil circulation even under extreme thermal loads, directly supporting the longevity of adjacent components such as the 5838022003 REAR AXLE and the 5838109001 DIFFERENTIAL. Without this tube, the entire lubrication circuit fails, leading to rapid component degradation.
Symptoms of Failure
- Intermittent gear slipping under load: A cracked or blocked lubrication tube starves the 0750117075 TAPER ROLLER BEARING of oil, causing momentary torque loss during excavation or grading.
- Visible oil seepage near transmission bell housing: Fractures in the tube wall allow pressurized oil to escape, often misdiagnosed as a seal failure.
- Elevated operating temperatures in the differential area: Restricted flow through the tube reduces heat dissipation, triggering thermal warnings on construction machinery dashboards.
- Metallic debris in oil filter: Insufficient lubrication accelerates wear on the 5838300128 DIFFERENTIAL HOUSING, generating fine metal particles.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 5838.300.224 |
| Material | Seamless drawn steel with anti-corrosion coating |
| Overall Length | 285 mm (estimated) |
| Outer Diameter | 12.7 mm (0.5 inch) |
| Wall Thickness | 1.5 mm |
| Weight | 0.18 kg (0.4 lbs) |
| Fluid Pressure Rating | 8 bar (116 psi) max |
| OEM Reference | ZF 5838.300.224 |
Compatibility
This lubrication tube is engineered for ZF power shift transmissions commonly used in construction machinery, specifically the WG180, WG200, and WG210 series. It also fits select variants of the 4WG-200 and 5WG-200 torque converter transmissions. The tube interfaces directly with the 5838300128 DIFFERENTIAL HOUSING and supports oil routing to the 5838022003 REAR AXLE assembly. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838022003 | REAR AXLE | Transfers torque to wheels; receives lubricated oil from tube |
| 5838109001 | DIFFERENTIAL | Distributes power between wheels; requires constant oil flow |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads; lubricated by tube |
| 5838300128 | DIFFERENTIAL HOUSING | Encloses differential gears; tube mounts to this housing |
| 0631329086 | SPRING PIN | Secures tube alignment within housing bore |
| 5838300129 | THRUST WASHER | Reduces axial friction on differential side gears |
| 5838300130 | THRUST WASHER | Secondary axial wear surface for differential assembly |
| 5838300131 | AXLE BEVEL GEAR | Transfers rotation from differential to axle shafts |
| 5838300132 | COMPENS. STUB AXLE | Compensates for axle length variations in heavy loads |
| 5838300133 | COMPENS. STUB AXLE | Secondary compensation axle for dual-wheel configurations |
