How to Measure a Trailer Hub or Dust Cap to Find the Right Replacement Dust Cap

Question

Question:

I have a golf cart trailer that I turned into a utility trailer. I just finished the trailer up and I have notice that my new dust cap fell off. Is there any way of measuring the old dust cap that I have that I replaced with the new. I really dont want to take the wheel off again.

asked by: Kevin

0

Expert Reply:

You can measure either the outer diameter of the part of the dust cap that fits into the hub OR the inner diameter of the hub where the dust cap goes using calipers such as # PTW80157. Calipers are needed because the measurement has to be as accurate as possible.

I also might be able to figure it out based on the outer bearing number which you should be able to see without taking the hub off.

expert reply by: Michael H

0

David N.

2/11/2020

MY hub measured 1.9996. Do I use a 2.0 cap or what size is correct?

Jason S.

2/12/2020

You will want the Grease Cap, 1.99" OD EZ Lube Drive in with Plug - Qty 2 # RG04-040. The caps don't get rated to the ten thousandths place.

Brandon C.

4/19/2020

Hello I measured my dust cover at 1.775 with digital calipers. I need two for my boat trailer and was hoping to find some bearing buddies.

Chris R.

4/21/2020

We don't have a Bearing Buddy set that quite matches up to the diameter you listed. Would you be able to measure the actual hub bore diameter (instead of the cap itself) with that caliper?

Answer 1

The next largest size is #RG04-040 which has an OD of 1.99 inches. If you can provide me with the reference number from your outer wheel bearing, I'd be happy to check into the availability of a suitable grease cap.

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Answer 2

Bearing Buddies like #BB2240 are waterproof. They are commonly used in boat applications so you would not have to worry about them allowing water past them into your hub. Based on the dimensions of your hub these are the correct fit. I attached a…

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Answer 3

The Dutton-Lainson Hand Winch #DL15303 is a direct replacement for your older DL1400model winch so it is what I recommend using as a replacement. I reached out to my contact at Dutton-Lainson who confirmed this. Attached is a review video for you to…

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Answer 4

You would need to measure the inside diameter of the hub opening to determine which cap size is needed. You would want to choose a cap whose outside diameter matches the inside diameter of the hub. Some of the most common sizes are 1.980 inch, 1.986…

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Answer 5

Hi Elliott; the Valterra RV Water Tank #R8048 has three 3/8" threaded fittings on each end of the tank. You can see them in the attached picture, one has a red plug. The tank is only designed to be gravity fed or used with a hand pump, not an…

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Answer 6

The first thing to try to is add some penetrating oil like WD40 and let it sit for awhile. You can then try tapping the bearing to try and remove it. You don't want to hit it too hard because you can damage the spindle. It is possible that the…

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Answer 7

Because the Valterra RV Water Tank #R8048 is a lightweight tank that is baffled for surge control, it is not designed for use with electric water pumps. It would void the warranty if used this way and is why they specifically note on their site:…

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Answer 8

Hey Robert, yes the Kodiak disc brake calipers part #KDBC225DAC that you referenced will replace the Tie Down calipers you have now 46304, they can be used as a left or right hand caliper and does come with ceramic brake pads. If you ever needed…

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Answer 9

The Bearing Buddy part #BB2047 is supposed to be a snug fit. If a 2 inch diameter cap is too small the #BB2047 should be the right fit. But without knowing what the diameter of the hub bore its hard to say that definitively. I would recommend you use…

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Answer 10

Usually when you replace parts that get lubricated, you clean all of the existing grease first before adding any new grease, just in case there is a compatibility issue. Since you are using Dexter axles and replacing components with Dexter parts, the…

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Answer 11

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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Answer 12

For lubricating any lock, a dry lubricant like powdered graphite is recommended. Using grease and oil or spray lubricants like WD 40 can actually attract dirt and grime and make the lock cylinder sticky after a time.

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How to Measure a Trailer Hub or Dust Cap to Find the Right Replacement Dust Cap

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