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How to Select Size of Grease Caps for 1993 Coleman Destiny Pop-Up Camper Trailer  

Updated 09/17/2018 | Published 09/15/2018

Question:

I keep buying bearing caps that fall off after a short distance. Does this axle use a non-standard size dust cap for the bearings ?? Do you have a cap that would work ?? Thanks.

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Expert Reply:

A grease cap such as Bearing Buddy bearing protector # BB1980A-SS or a standard grease cap like # F001526 needs to be selected based on a precise measurement of the hub bore. This measurement really needs to be taken with a precision caliper so that you can measure to the nearest thousandth of an inch, such as 1.234-inches.

Some hubs have a threaded bore and there are special Bearing Buddy caps made for these threaded hubs too.

Ideally the size of grease cap you select will be a few thousandths larger than the hub bore, say 3 to 5 thousandths larger. The fit should be snug enough that you cannot insert the cap easily by hand. Using a block of wood and a rubber mallet is usually best for installing a grease cap.

All grease caps appear on the linked page and you can click on the filter for the size closest to your hub bore dimension.

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Adam R
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