Replacement Double Lip Grease Seal for National Seal 471750

Question

Question:

I am looking for a double lip marine trailer replacement seal . Can you cross reference national part number 471750 and provide me a seal ? Inner bearing is =L44649 Outer bearing is =L44649 Race is =L44610 Seal= National 471750 Spindle size is 1inch 1/16

asked by: Tim

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Expert Reply:

It looks like the National 471750 grease seal has an outer diameter of 1.983 inches and an inner diameter of 1.25 inches. The replacement grease seal that we offer is part # 34823. This is a double lip grease seal that is best suited for marine applications such as a boat trailer and it fits hubs that use the same bearing and race combination and spindle size that you mentioned.

If you also need new grease, I recommend picking up our LubriMatic Marine Trailer grease # L54FR which includes three - 3 oz cartridges and a compatible grease gun like the # L30100 for the cartridges if you need one.

expert reply by: John H

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Answer 1

The guy you were speaking with was telling the truth. If the Bearing Buddies are overfilled, you will indeed blow out the grease seal. The excessive pressure will push the grease out through the rubber portion of the seal. Using a double lip grease…

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Answer 2

For your application we have two grease seal options, both of which have the double lip. We have seals measuring 1.249 inches inner diameter and 1.938 inches outer diameter sold in a pair #RG06-010. We also have the individual seal with the same…

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Answer 3

I cross-referenced the National 471750 grease seal for you and found that the seal has a 1.98 inch outer diameter and a 1.25 inch inner diameter and a .25 inch thickness which is comparable to the #34823 double lip seal we offer. This being said,…

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Answer 4

The bearing kit we offer that uses the L44649 bearings is part #BK1-150. This kit is designed for 3,500-lb axles and it includes the bearings, races, seal, cotter pin, and an EZ Lube spindle washer. This bearing kit is designed to fit spindles that…

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Answer 5

You are always going to end up burning a seal when you work on a hub or change bearings. Anything that requires removing the seal. Its because they go in so tight. With an EZ lube axle you are going to want a double lip seal so your instincts were…

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Answer 6

The appropriate torque spec for any application will vary depending on the construction of the wheel as well as on the stud size. I suggest checking the wheels you're using to see if their manufacturer has a suggested torque rating. Steel…

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Answer 7

The amount of torque used on a lug nut is going to depend on a few different factors. I have included a chart with lug nut torque information that you can follow. Please note that the specs are different depending on the material of the wheel and…

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Answer 8

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 9

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 10

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 11

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are…

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Answer 12

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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