ZF 5838.300.645 AXLE FLARED TUBE | OEM Genuine Part

Overview

The ZF 5838.300.645 AXLE FLARED TUBE is a precision-engineered hydraulic conduit designed to deliver pressurized lubrication and cooling fluid directly to the differential assembly within heavy-duty construction machinery transmissions. This OEM genuine part sits between the transmission housing and the axle carrier, forming a critical sealed pathway that ensures consistent oil flow to the 5838109010: DIFFERENTIAL and 2093209023: DIFFERENTIAL components. The flared end design creates a leak-proof connection under high-pressure operating conditions. When replacing this component, always verify the SKU 5838.300.645 matches your unit to maintain proper fluid dynamics and prevent premature wear on adjacent assemblies.

Symptoms of Failure

• Visible oil seepage around axle tube connections – A worn or cracked flared tube often causes slow drips at the junction between the tube and the 5838300626: DIFFERENTIAL HOUSING, leaving puddles under parked equipment.
• Intermittent gear grinding during tight turns – Insufficient lubrication from a compromised tube leads to metal-on-metal contact inside the differential, producing a distinct whine or chatter.
• Overheating axle assembly – Restricted oil flow through a deformed or blocked flared tube causes the differential and 0750117075: TAPER ROLLER BEARING to run hot, often triggering thermal warning sensors.
• Low transmission fluid level without external puddles – Internal cracks in the tube can allow oil to bypass into the axle housing, reducing sump volume and causing erratic shifting.

Technical Specifications

Compatibility

This flared tube is engineered for ZF heavy-duty powershift transmissions commonly found in wheel loaders, graders, and dump trucks. It directly fits the following ZF models: WG180, WG200, WG210, and WG310 series. The part also integrates with the 4WG-200 and 6WG-310 variants. Always cross-reference your transmission serial number with the SKU 5838.300.645 to ensure correct fitment, as axle tube routing varies between standard and wide-track configurations.

Related Components

Frequently Asked Questions

Q: Can I reuse the old O-rings when installing a new 5838.300.645 flared tube?
A: No. Always replace all sealing rings and gaskets when installing this tube. The flared connection relies on a fresh metal-to-metal seal, and old elastomers can cause immediate leaks.

Q: How do I know if my ZF transmission uses this specific flared tube?
A: Measure the tube length and flare angle. The 5838.300.645 has a 45° flare and 215 mm length. If your original tube has a 37° flare or different length, you need a different SKU. Consult your transmission parts manual for confirmation.

Q: Will a damaged flared tube affect the 0750117075: TAPER ROLLER BEARING?
A: Yes. Insufficient lubrication from a cracked tube starves the taper roller bearing, leading to spalling and eventual bearing seizure. Replace the tube immediately if you notice bearing noise.