Identifying Replacement Bearings for Boat Trailer with 4-on-4-Inch Hubs
Question:
Got a boat on trailer sitting on blocks in drive. Hubs were smoking when pulled in so pulled hubs to replace bearing. Got a kit at tractor supply but the axle size is 1inch and is too big. There are no make or model # visible on hub or bearings. Bearings are tapered. think outside diameter on above kit is OK H4-C-BP-B Can supply photos. Your bearing do not supply dimensions just part #s great for you but does me no good. Think the Axles come out 7/8inch OD and the hub is 4 1/8 long 4 bolt 4inch pattern for 4:80 x 8 tire and wheel
asked by: Captnlen
Expert Reply:
As it happens, all of our 4-on-4 hubs use inner and outer bearing # L44643 or # L44649. All idler hubs and hub/drums using these bearings are linked for your review.
If you cannot find part numbers on your trailer's bearings (please see the linked photo for their usual appearance) you'll need to take very precise measurements of your spindle and hub in order to determine which seals and bearings will fit them. The photo shows where to measure the spindle for seal and bearing inner diameters (position B for the seal, and positions C and D for the inner and outer bearings). You'll need a precision caliper like # PTW80157.
Once you've found the correct bearings or replacement hubs you may want to use a bearing packer like # L70025 along with marine grease # L54FR and a compatible mini-grease gun like the # 30-800.
Since your hubs got very hot during their last use be sure to carefully inspect the spindles and hubs for any heat-related damage.
Products Referenced in This Question
LubriMatic Mini Grease Gun with Straight Pipe - 12" Hose
- Lubricants Sealants Adhesives
- Greasing Tools
- Grease Gun
- 4500 psi
- 3 oz
- LubriMatic
more information >
Replacement Trailer Hub Bearing - L44643
- Trailer Bearings Races Seals Caps
- Bearings
- Standard Bearings
- 1.000 Inch I.D.
- Bearing L44643
- Race L44610
- 2000 lbs Axle
- etrailer
more information >
Replacement Trailer Hub Bearing - L44649
- Trailer Bearings Races Seals Caps
- Bearings
- Standard Bearings
- 1.063 Inch I.D.
- Bearing L44649
- Race L44610
- 3500 lbs Axle
- etrailer
more information >
LubriMatic Marine Trailer Wheel Bearing Grease - 3 oz. Cartridges - Qty 3
- Lubricants Sealants Adhesives
- Grease
- Brake and Bearing Grease
- Petroleum-Based
- Marine Bearing Grease
- Calcium Sulfonate
- 3 oz
- LubriMatic
more information >
LubriMatic Deluxe Bearing Packer
- Lubricants Sealants Adhesives
- Greasing Tools
- Bearing Packer
- LubriMatic
more information >
4" Carbon Fiber Digital Caliper
- Hand Tools
- Measuring and Layout Tools
- Digital Calipers
- Carbon Fiber
- Performance Tool
more information >
Product Page this Question was Asked From
Hub Bearing Kit for Lippert, Dexter, and AL-KO Axles - 3,500 lb with #84 Spindle
- Trailer Bearings Races Seals Caps
- Bearings
- Standard Bearings
- Bearing Kits
- Bearing L44649 and L68149
- Race L68111 and L44610
- 3500 lbs Axle
- etrailer
more information >
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