Replacement Parts for Oil Bath Hub with Seal 203034X and Bearing 1779

Question

Question:

This is a follow up to this question I asked yesterday, with some pictures and new information: After disassembling the hubs, I can confirm that all the bearing part numbers were correct. I was also able to read a part number on the National seal after all: #203034 x. Ill need at least two of the seals and the outer bearing, but the inner bearing and both races look okthough maybe I should replace the race on the damaged outer bearing anyway? What Im most interested in, however, is confirming whether these are oil bath hubs and finding any additional information on service and repair. I do a lot of work on my own cars, but Im not that familiar with trailersI suppose I need to clean the hubs with solvent I packed bearings with grease and fill with oil? Which oil? It seems to me that the threaded dust caps would need an additional seal of some sort to keep the oil in tooany insight on that? The hubs have the letter KH and K 92 cast into them if that helps. Ive attached a pictures to help you identify, and would upload more but your website is not working properly to do sothese seem to be particularly unusual parts to find on a homebuilt trailer.

asked by: Seth

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Expert Reply:

That certainly does appear to be an oil bath hub. The seal number is associated with 1956 to 1959 Studebakers as far as I could find. It looks like the dimensions of the seal are 1.875 inches inner diameter and 3 inches outer diameter. We have one seal that has the dimensions, # 29031, but it is a grease seal, not an oil seal.

The bearing # 1779 is associated with race # 1729. They fit hub 22834 which from what I could find is not an oil bath hub. The inner bearing that is associated with the hub and the outer bearing is # 2788 with race # 2729.

We don't have replacement hubs for this and you will need to check the dimensions on each part and compare them to your bearings, races, and seals to determine fit.

On an oil bath hub it is the oil that lubricates the bearings so you wouldn't grease them. But if the above parts all fit then you could pack the bearings with grease instead of using oil and it would work fine.

expert reply by: Michael H

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Answer 1

We do have exactly what you are looking for, hubcaps that fit 16 inch trailer wheels that have 8 lugs; what you need is the following: - Phoenix USA Baby Moon Hubcap #PX1309SS These fit 16" conventional wheels that have a 6 on 5-1/2" or 8…

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Answer 2

The 7.00-15LT tires you have on your 1978 Avion trailer have a 29.4" diameter, have a load range that should be in the 2,400 lb vicinity and fit wheels that are 5", 5-1/2" and 6". For comparable tires I recommend going with a…

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Answer 3

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 marked…

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Answer 4

The bearing numbers you have provided indicate that you have hub 22834. This hub is no longer made but there are parts for it such as the bearings #2788 and #1779 an the races #2729 and #1729. The hub is rated for 2,600 pounds which means it fits a…

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Answer 5

You are indeed right to think this way. When picking out the appropriate leaf springs for your custom built trailer you will want to choose them based on what the actual loaded weight of the trailer will be. Just make sure that the leaf springs have…

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Answer 6

We don't offer any axles or hubs that are compatible with that wheel bearing set, but a 1-3/4 inch square axle would typically carry a 1000-2000 lb capacity. If you were needing a replacement axle, I'd be happy to look through our offerings…

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Answer 7

Typically 1-1/2 to 1-3/4 inch diameter axles have 1,000-1,200 lb capacities. Since your axles are smaller than that I can only assume slightly less than 1,000 lbs. On some trailers there will be a plate or sticker that will list the trailer…

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Answer 8

For your 1779 outer and 2788 inner bearings you will want the following parts. Replacement Trailer Hub Bearing - 1779 item #1779 Replacement Trailer Hub Bearing - 2788 item #2788 The closest seal we have to a National 5970 is item #29031 which has an…

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Answer 9

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 10

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 11

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 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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Replacement Parts for Oil Bath Hub with Seal 203034X and Bearing 1779

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