Overview
The ZF 5838.300.571 LUBRICATION TUBE is a precision-engineered OEM genuine component responsible for directing pressurized oil to critical bearing and gear interfaces within the transmission sump. Positioned inside the lower valve body or main case gallery, this hardened steel tube ensures a consistent flow of lubricant to high-wear zones such as the differential pinion and planetary gear sets. The SKU 5838.300.571 is a direct replacement for factory-installed units, eliminating the risk of oil starvation that can lead to premature component failure. When paired with a properly sealed DIFFERENTIAL HOUSING, this tube maintains the hydraulic circuit integrity essential for heavy-load construction machinery operation.
Symptoms of Failure
- Oil leaks at the tube-to-case interface: A cracked or deformed 5838.300.571 tube will cause transmission fluid to weep from the housing seam, leaving visible puddles under the machine after shutdown.
- Erratic gear engagement under load: Insufficient lubrication from a blocked or collapsed tube leads to localized overheating, causing the transmission to slip or hesitate when shifting into forward or reverse.
- Whining or grinding noise from the differential area: When oil flow is restricted, the DIFFERENTIAL bearings and TAPER ROLLER BEARING assemblies produce a distinct high-pitched whine that worsens during turns.
- Metal particles in the oil filter: A fractured lubrication tube can shed debris into the oil circuit, accelerating wear on the DIFFERENTIAL gears and requiring immediate inspection.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.300.571 |
| Material | Seamless cold-drawn steel, zinc-plated |
| Length | 215 mm (approx.) |
| Outer Diameter | 12 mm |
| Wall Thickness | 1.5 mm |
| Weight | 0.18 kg |
| OEM Reference | ZF 5838.300.571 |
Compatibility
This lubrication tube is engineered for ZF WG-series powershift transmissions commonly found in wheel loaders, graders, and telehandlers. It is a direct fit for the WG180, WG200, and WG211 models, as well as the WG310 series used in heavy construction machinery. Always verify the tube routing against your transmission’s oil gallery layout; the 5838.300.571 replaces earlier part numbers 5838.300.570 and 5838.300.569 without modification.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109009 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential pinion shaft |
| 2093209023 | DIFFERENTIAL | Rear differential assembly for WG200 |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears |
| 0631329088 | SPRING PIN | Secures shift fork to rail |
| 5838300811 | THRUST WASHER | Controls axial play in differential |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 5838300633 | AXLE | Drives final reduction gears |
| 5838300753 | THRUST WASHER | Bearing surface for planetary gears |
| 5838300818 | THRUST WASHER | Prevents gear-to-housing contact |
Frequently Asked Questions
Q: Can I reuse the old O-rings when installing the 5838.300.571 tube?
A: No. Always replace all sealing rings and gaskets in the oil gallery to prevent leaks. The tube’s compression fit requires fresh seals for proper oil pressure retention.
Q: Will this tube fit a ZF WG180 transmission built before 2005?
A: Yes. The 5838.300.571 supersedes all earlier lubrication tube variants for the WG180, WG200, and WG211. No adapter or bracket is needed.
Q: How do I confirm the tube is not clogged before installation?
A: Blow compressed air (max 2 bar) through the tube while blocking one end. A steady airflow confirms the internal bore is clear. If resistance is felt, replace the tube immediately.
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