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

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David N.

2/11/2020

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

Reply

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.

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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.

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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?

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Answer 1

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 2

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 3

No, but I have one that will! Since your caravan weighs 5,000 lbs the Ark Xtreme item #ORJW1SU is going to be way under capacity. Instead you'll want to use the Trailer Valet 5X Swivel Jack and Trailer Mover item #STC-V211. This jack attaches in…

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Answer 4

I have included an image below with the measurements for the mounting plate on the Xtreme Off-Road Ratcheting Trailer Jack #ARK54FR. The hole to hole measurements are from center of hole to center of hole.

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Answer 5

The Extreme Off-Road Ratcheting Trailer Jack #ORJW1SU has a static weight capacity (load support) of 770 lbs but ARK does not do a test for dynamic load rating, so it's hard to say what kind of trailer load this jack could move. If you're…

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Answer 6

The part #RG04-020 might be barely too tight of a fit. Instead you would want the part #F001610 which is designed for fitting 1.96 bores on hubs like what you have. The overall height of this is 1.375 inches.

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Answer 7

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 8

Hey Brian, For inner bearing #15123 you would need race #15245 and for outer bearing #25580 you would need race #25520. The grease seal can be purchased with part #GS-2250DL. The Timken Bearing Kit #TMK42VR would include 15123/25580 Bearings,…

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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

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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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

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

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