How to Select the Correct Grease Seals for a 2008 Interstate LoadRunner 5x10 Cargo trailer

Question:

Hi guys - I have a 2008 Interstate LoadRunner 5x10foot Cargo trailer that I would like to pre-purchase grease seals for before repacking the bearings. 1 Interstate does not have the part numbers with reference to the VIN 2 I do not want to disassemble the hub yet to get any part numbers because it is cold and snowy outside - I will only have one shot at this 3 It has a 3500 lb axle with 5 on 4 1/2inch hubs and 15inch tires. Is there any way to know what grease seals to purchase? Thank you for your time and assistance.

asked by: Brian

Expert Reply:

It is difficult to determine the correct grease seal for your trailer without either information from the trailer manufacturer or removing the trailer hub and getting part numbers or measuring. The actual seal part number form the rubber portion of the seal would be the best way to determine the correct seal, and the next best way would be to use the bearing part numbers to select the correct seal for the hub and spindle.

For the 3500 lb axle with 5 on 4 1/2 inch bolt pattern hubs, there are 3 different grease seals that are commonly used. The most common is the double lip grease seal 10-19, # RG06-050, next there is the double lip grease seal 10-60, # RG06-020, and finally the double lip grease seal 12192TB, # RG06-010.

The inner and outer diameter of all of these seals is different so we would need to match them to the bearings that they work with or take a measurement to be sure we select the correct seals.

There is one possibility for measuring without removing the hub as long as your trailer does not have brakes on the axle. The brake backing plate would not allow for this measurement, and if you have a brake mounting flange on the axle it could make the task more difficult.

You would need to safely raise one of the trailer wheels, remove the grease cap, and loosen the spindle nut most of the way. There is no need to remove the wheel and tire but it may make the process a bit easier. Then lie on the ground so you can see the back side of the hub where the grease seal rides on the spindle, see photo. You should be able to push the hub out enough now so that you can get a dial caliper in there, or use a measuring caliper, to get the correct measurement for the seal bearing surface on the spindle.

If you do this, you can select the correct seal from the inside dimensions (I.D.) on the product pages I linked for you.

The Bearing Buddy grease seal that you selected, # BB60005, would not be the correct replacement for your axle.