ZF 5838.300.573 LUBRICATION TUBE | OEM Genuine Part

Overview

The ZF 5838.300.573 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. Positioned inside the lower valve body or main case gallery, this tube ensures a steady, directed flow of lubricant to high-friction zones, preventing metal-to-metal contact during heavy-load operation. The SKU 5838.300.573 is machined from corrosion-resistant steel and features a flared end for secure sealing against O-rings. In a typical ZF powershift assembly, this tube works in concert with the 2093109002: DIFFERENTIAL to maintain consistent oil film thickness on the ring gear and pinion set.

Symptoms of Failure

• Transmission oil leak at the case seam: A cracked or deformed lubrication tube allows pressurized fluid to escape past the sealing rings, leaving visible drips under the bell housing or transfer case.
• Intermittent gear slipping under load: When the tube fractures or becomes clogged with debris, the 0750117075: TAPER ROLLER BEARING loses its oil supply, causing momentary loss of torque transfer during uphill or loaded operation.
• Elevated operating temperature and whining noise: Insufficient lubrication forces the 2093209095: DIFFERENTIAL to run dry, generating excessive heat and a high-pitched whine from the center housing.
• Metal particles in the oil filter: A collapsed tube fails to protect the 2093309071: DIFF.HOUSING from debris, leading to accelerated wear and bronze or steel shavings in the sump.

Technical Specifications

Compatibility

This lubrication tube is a direct fit for ZF WG series powershift transmissions commonly used in construction machinery. Based on its dimensional profile and port configuration, the 5838.300.573 is compatible with the following ZF models: WG180, WG200, WG210, and WG250. It also applies to select variants of the 4WG-200 and 5WG-210 series found in wheel loaders, backhoe loaders, and telescopic handlers. Always verify the tube’s orientation against the valve body casting before installation.

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Frequently Asked Questions

Q: Can a damaged lubrication tube cause the transmission to overheat?
A: Yes. A cracked or blocked 5838.300.573 tube starves the taper roller bearings and differential gears of oil, leading to friction-generated heat that can exceed 120°C and trigger thermal derating.

Q: Is the 5838.300.573 interchangeable between WG180 and WG200 transmissions?
A: In most cases, yes. The tube’s length and port diameter are identical across these models, but we recommend comparing the retaining clip groove position against your valve body to ensure a positive lock.

Q: How often should this lubrication tube be inspected?
A: During every major transmission overhaul (typically every 4,000–6,000 hours in construction machinery). Look for flattening at the O-ring groove or corrosion pitting on the tube body.