Protect your trailer wheel ends with genuine Lippert unitized oil seals engineered specifically for 10,000-lb axle applications. This 2-pack covers both sides of a single axle and delivers consistent, long-term sealing to keep lubricant in and road contaminants out.
The Lippert 2023134019 is a unitized wheel end oil seal designed for Lippert-manufactured 10,000-lb trailer axles. "Unitized" means the seal body, sealing lip, and wear sleeve are factory-assembled as a single unit -- eliminating the alignment errors that can occur when installing separate seal and sleeve components. This design makes installation more repeatable and reduces the risk of premature seal failure caused by misalignment.
The seal fits hubs with a 2.875" spindle shaft diameter (inner bore) and a 3.875" hub bore (outer diameter). If your axle and hub do not match both of these dimensions exactly, this seal is not the correct fit. Confirm measurements before ordering.
Seal lip, body, and wear sleeve are assembled as a matched unit for consistent, repeatable installation.
Engineered for the load and rotational demands of heavy-duty 10K trailer axle wheel ends.
Precise dimensional fit -- both measurements must match your spindle and hub bore before installing.
One package seals both wheel ends on a single axle. No need to buy separately for each side.
Lippert manufactures and supplies axles for a wide range of RV trailers, fifth wheels, and utility trailers. Their OEM seals are dimensioned and material-specified to match the exact spindle geometry of their axle families. Aftermarket seals may differ in lip durometer, case tolerance, or wear sleeve hardness -- any of which can affect service life, especially on axles that see highway miles loaded to or near rated capacity.
Using the correct genuine part also matters for warranty documentation if your trailer or axle is still under a Lippert coverage period.
This 2-pack includes one seal for the driver side and one for the passenger side wheel end. For a tandem-axle trailer, you will need two packages (one per axle).
Traditional setups use a separate oil seal pressed into the hub plus a separate wear sleeve pressed onto the spindle. Unitized seals combine both into a single assembly that installs in one step and automatically positions the sealing lip relative to the wear surface. This reduces installation variables and is the format Lippert specifies for their heavier axle lines.
Unitized oil seal installation on a trailer hub requires the hub to be removed from the spindle. The old seal must be driven or pressed out cleanly without damaging the hub bore surface. The new unitized seal is then pressed or driven squarely into the hub bore until seated flush. Improper installation angle is the most common cause of early seal failure -- use a proper seal driver sized for the 3.875" OD, not an improvised tool.
This seal is only correct for a 2.875" spindle shaft diameter combined with a 3.875" hub bore. Lippert produces axles in multiple spindle and hub bore sizes. Installing a seal that does not match either dimension will result in immediate leakage or seal failure under load. Check your axle label or measure the spindle and hub bore directly if unsure.
On oil-bath hub systems, wheel end oil level should be checked at every brake inspection interval -- typically annually or every 12,000 miles, whichever comes first. Low oil level is a leading cause of bearing and seal damage. Replace seals any time you see oil weeping at the hub face, smell burning oil near the wheel, or find contaminated or milky-looking oil when the hub cap is removed.