Trailer Hub Grease Seal Recommendation for Replacing National Seal 474276

Question

Question:

I am looking for a replacement for a national seal #474276. Now my question is your seal replacememt,which you say is a match is 1.500 ID x1.987 OD, and mine says it is 1.983 OD. Is that difference going to be a problem, thanks

asked by: Larry J

1

Helpful Expert Reply:

Your dimension of 1.983 is close enough to the dimension of the # 10-9 which has outer diameter of 1.987 and the cross reference numbers match so this would be a fit and would work well.

expert reply by: Jameson C

1

Answer 1

You can use the other components you remove from your hubs. After you have removed the hub components you will want to inspect all of the parts and replace if you find any discoloration or signs of wear or damage such as a nick. On the race you can…

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Answer 2

I was able to find the part you referenced, National Oil Seal part number 474276, on an internet search. Please note that this is an oil seal, not a grease seal, and is intended for oil bath bearings. We do offer a range of both types of seals,…

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Answer 3

We do have a replacement for Nationals part number 473336. It is our Grease Seal - Double Lip #RG06-050. It comes in a two pack. It has an inner diameter of 1.719 inches and an outer diameter of 2.565 inches. I have a review video down below of the…

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Answer 4

You can check the condition of your hub's races by carefully removing all bearing grease with a rag to expose the actual surface of the races. When they are completely free of grease, etc., inspect them for any signs of scoring (very slight…

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Answer 5

A BT8 spindle would have a diameter of .99 of an inch where the bearings would both install and would have a diameter of 1.24 where the great seal would ride. That would require a hub part #AKIHUB-440-2-1K for an idler hub. A BTR spindle would have…

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Answer 6

More than likely, no. Any given spindle and hub will take specific bearing sizes. A bearing that is too large will not fit inside the hub or on the spindle. Bearings that are too small for the hub will create a very dangerous situation. I would need…

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Answer 7

If the race is fine you are totally okay to just replace the bearings. In most situations just replacing the bearing is all that's needed.

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Answer 8

Hubs will heat up when driving, but if it feels like they are getting too hot, then you will want to look at a few things on your hub. My guess is that the spindle nut is too tight and the added stress on the bearings is overheating the bearings and…

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Answer 9

Since Demco uses 3,500 drum brake assemblies part #DMSB24429M and #DMSB24428M what you'd need is similar 3,500 electric brake assemblies like the etrailer part #AKEBRK-35L-SA for the left hand side and #AKEBRK-35R-SA for the right hand side. To…

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Answer 10

The old version of the #HBA-CAM used 4 wires, but the product was updated awhile back and now uses only two wires as shown in the photo on the product description page. The white wire from the HBA-CAM would tap into the white ground wire and the blue…

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Answer 11

I did some checking and the hub/drum we offer that will work for you is the part #8-430-5UC3. This uses the same bearings as the 8-415 and will be an exact fit aside from the fact this is a non-ABS setup and the 8-415 came in an ABS setup and non-ABS…

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Answer 12

You will need the Red LED Trailer Clearance or Side Marker Light #328-K-52 or Amber LED Trailer Clearance or Side Marker Light #328-K-51 for your 2018 Forest River Sunseeker motorhome. These lenses have the same Top Command SAE-AP2-16 markings on the…

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Trailer Hub Grease Seal Recommendation for Replacing National Seal 474276

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