HD Switch Trailer Hub Bearing Rebuild Kit 2-Pack for 3500 lb Axles — L68149/L44649 Bearings & 1.719" Grease Seals

These two rebuild kits provide complete hub bearing, seal, and hardware replacements for 3500 lb single or tandem trailer axles, using L68149 and L44649 bearing sets with 1.719" ID grease seals.

Whether you're maintaining a boat trailer, pop-up camper, or light utility trailer, the HD Switch rebuild kits are built to restore hub performance and reduce downtime. Each kit contains precision-machined bearings and races, double-lip grease seals, and the small hardware needed to finish a two-wheel rebuild—enough parts to service both wheels on an axle. The components are produced from high-grade steel for dimensional accuracy, reduced friction, and longer life under radial and axial loads.

What exactly is included in each 2-wheel rebuild kit?

Each kit is assembled to cover both wheels on one 3500 lb axle and includes matching inner and outer bearings, cups/races, seals, and installation hardware. The combination of sizes addresses the common L68149 and L44649 bearing families used on many light trailer spindles.

• Bearings: (2) L44649/L44610 (1.062" x 1.980") and (2) L68149/L68111 (1.370" x 2.360")
• Seals: (2) double-lip grease seals, 1.719" ID x 2.560" OD
• Hardware: (2) locking tang washers and (2) cotter pins
• Designed to rebuild two wheels (complete hub service for one axle)

How do these parts improve trailer hub performance?

The bearings and races are precision machined to tighter tolerances than many economy parts, which reduces internal friction and heat generation. Lower friction extends component life and helps keep brakes, hubs, and seals operating at proper temperatures under load.

• Precision-machined steel for consistent fit and reduced play
• Double-lip seals help retain grease and keep contaminants out
• Matched cup-and-cone sets ensure correct preload capability
• Includes necessary locking hardware for proper assembly

Which axle and spindle setups are these kits compatible with?

These kits are intended for 3500 lb trailer axles using the L68149 (large) and L44649 (small) bearing families and a 1.719" ID grease seal. They fit many common boat trailer, camper, and utility trailer spindles that specify those bearing and seal dimensions.

• Rated for 3500 lb axles (single and tandem configurations)
• Spindle bores accepting 1-3/8" and 1-1/16" bearing IDs as specified
• Common on boat trailers, pop-up campers, and light utility trailers
• Not for heavy commercial axles or non-matching spindle dimensions

What tools and steps are required to install the kits?

Installation is standard hub rebuild work: remove the wheel and hub, extract old bearings and races, press or drive in new cups, install new cones and seals, pack bearings with grease, and torque to spindle specifications. A bearing packer, press or appropriate driver set, and torque wrench will make the job faster and more reliable.

• Tools: bearing press/driver, bearing packer (or grease gun), torque wrench
• Follow spindle manufacturer torque and preload specs for safety
• Replace one hub at a time to use the opposite side as a reference
• Inspect hub bores and spindles for wear before final assembly

Who is this for: These HD Switch two-wheel rebuild kits suit trailer owners and DIY mechanics who need a reliable, complete bearing service pack for 3500 lb axles—especially boat and camper owners who want accurate fits, better sealing, and reduced maintenance intervals. If you operate single or tandem axles that call for L68149 and L44649 bearings with a 1.719" ID seal, this set gives you matching cups, cones, seals, and the small hardware to finish a hub rebuild correctly. If your spindle dimensions or bearing numbers differ, verify compatibility before purchasing.