HD Switch Trailer Hub Bearing Rebuild Kit — 2‑Kit 3500 lb, Fits 1.125" & 1.375" Spindles, L68149/L44649 with Seals & Hardware

HD Switch 2-kit hub bearing rebuild provides two complete axle hub rebuilds—precision bearings, races, seals, and hardware engineered for boat trailers, pop-up campers, and single or tandem axle use.

This kit includes everything needed to rebuild two wheels: paired inner and outer bearings (L44649/L44610 and L68149/L68111), matching races (cups), double-lip grease seals, locking tang washers, and cotter pins. Each component is precision machined from high-grade steel to reduce friction and extend service life under radial and axial loads common to trailer spindles. The package fits common 1.125" and 1.375" spindle applications and is designed for routine maintenance or emergency axle hub service.

What exactly is included in the 2-kit rebuild and what sizes do the parts match?

The kit rebuilds two wheels (one axle) or can service two axles for tandem setups when used twice. Bearings, races, seals, and fasteners are matched for a correct fit on compatible spindles.

• Bearings: L44649/L44610 (1.062" ID x 1.980"), L68149/L68111 (1.370" ID x 2.360")
• Seals: double-lip grease seals 1.719" ID x 2.560" OD
• Hardware: (2) locking tang washers and (2) cotter pins
• Quantity: two full bearing sets (rebuilts two wheels)

How does this kit improve trailer hub performance and longevity?

Components are precision machined from high-quality steel to minimize friction and wear. Reduced friction lowers operating temperature and slows degradation, which helps bearings maintain proper preload and extend service intervals.

• Precision races and cones for accurate seating and reduced play
• Double-lip seals to help retain grease and exclude water and debris
• Matched pairs to ensure correct axial and radial load distribution

Which trailers and spindles are compatible with this rebuild kit?

This rebuild targets common light- to medium-duty trailer axles such as boat trailers, pop-up campers, utility trailers, and small tandem or single-axle setups. Confirm spindle inside diameters and existing bearing numbers before ordering to ensure compatibility.

• Fits spindles that accept 1.062" (L44649) and 1.370" (L68149) inner/outer bearings
• Commonly used on #84 spindles and many boat trailer/pop-up camper hubs
• Works for both single and tandem axle configurations when installed per axle

How should I install and maintain these bearings to get the best results?

Install bearings and races with proper press tools or a bearing driver to avoid damage; always seat races fully in the hub and pack bearings with marine-grade grease if used on boat trailers. Torque the spindle nut to manufacturer specs and secure with the included tang washer and cotter pin.

• Use a press or driver; do not hammer directly on bearing surfaces
• Pack bearings with high-quality grease and fit double-lip seals correctly
• Recheck endplay after a short break-in and reseal if necessary

Who is this for: The HD Switch 2-kit rebuild is intended for DIY mechanics, service shops, and trailer owners who need a complete, high-quality bearing replacement for boat trailers, pop-up campers, and light- to medium-duty single or tandem axles. If you know the bearing numbers (L44649/L44610 and L68149/L68111) or have spindles that match these inner diameters, this kit delivers the matched races, seals, and hardware needed to restore reliable hub operation and reduce downtime.