Overview
The ZF 5838.300.355 LUBRICATION TUBE is a precision-engineered OEM genuine component designed to deliver pressurized oil directly to critical bearing surfaces and gear meshes within the transmission sump. This hardened steel tube acts as a dedicated fluid conduit, ensuring consistent lubrication flow to the planetary gear sets and differential assembly. As part of the internal oil distribution network, the SKU 5838.300.355 is mounted directly onto the transmission housing, where it directs oil from the pump to high-wear zones. Without this tube, even a fully charged hydraulic system cannot properly lubricate the 5838022003: REAR AXLE or the 5838109001: DIFFERENTIAL, making it a non-negotiable part for transmission longevity.
Symptoms of Failure
- Intermittent gear slipping under load: A cracked or blocked lubrication tube starves the clutch packs of oil, causing delayed engagement and power loss during acceleration.
- Visible oil leaks near the transmission bell housing: A fractured tube or loose banjo fitting allows pressurized oil to escape, leaving puddles under the equipment and reducing system pressure.
- Overheating transmission fluid: Inadequate oil flow from a damaged tube causes localized hot spots, triggering thermal alarms or burnt fluid odor.
- Whining noise from the differential area: Insufficient lubrication to the 0750117075: TAPER ROLLER BEARING produces a high-pitched metallic whine that worsens with speed.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.300.355 |
| Material | Seamless cold-drawn steel, zinc-nickel plated |
| Overall Length | 215 mm (8.46 in) |
| Tube Outer Diameter | 12 mm (0.472 in) |
| Wall Thickness | 1.5 mm (0.059 in) |
| Weight | 0.18 kg (0.40 lbs) |
| OEM Reference | ZF 5838.300.355 |
| Thread Type | M10 x 1.0 (both ends) |
Compatibility
This lubrication tube is engineered for ZF heavy-duty powershift transmissions commonly used in construction machinery. It is a direct fit for the WG180, WG200, and WG210 series. The part also integrates with the 5838300128: DIFFERENTIAL HOUSING assembly, where it routes oil to the pinion bearings. While primarily designed for wheel loaders and graders, it may also be found in certain ZF 4WG-200 and 6WG-200 variants. Always verify the transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838022003 | REAR AXLE | Transfers torque from differential to wheels |
| 5838109001 | DIFFERENTIAL | Distributes power between left and right wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 5838300128 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329086 | SPRING PIN | Secures components against rotational movement |
| 5838300129 | THRUST WASHER | Reduces axial friction between rotating parts |
| 5838300130 | THRUST WASHER | Controls end-play in differential assembly |
| 5838300131 | AXLE BEVEL GEAR | Changes drive angle from differential to axle |
| 5838300132 | COMPENS. STUB AXLE | Allows articulation in steering axle |
| 5838300133 | COMPENS. STUB AXLE | Counterpart for axle compensation system |
