Mounting Hole Size for A-Frame Trailer Jacks

Question:

Hi guys, I have a popup trailer and the frame jack is siezed and should be replaced anyway. My question is the mounting holes are 4.5 inches apart and the top two are 6.5 inches apart. Is my only option to weld on if this is the case or do they make that spread? Thanks!

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Expert Reply:

The mounting hole dimensions of A-frame jacks are a standard 3 inches apart on center, so you will need to weld your new jack on. I highly recommend the Bulldog Round, A-Frame Jack # BD1700100317, which has a 5,000 lb capacity and will give you 15" of lift. It has an outer tube diameter of 2-1/4" and sidewind handle; for a footplate you would want # BD018564. This jack has been highly praised by our customers, with nearly 200 reviews it has an average close to 5 out of 5 stars. I've added links to video reviews of this jack for you to take a look at as well.

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expert reply by:
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Kyle S

Question:

Could I use a jack that is side mounted to the frame? With U bolts? Would I have to worry about balance or would the 3-4 inch off-center placement not make that much of a difference? I thought about drilling new holes but the issue is that because of the placement of "hole for the jack", the 3 inch triangle would not even touch the sides of the trailer frame...it would basically slide through. Does that make sense?

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Expert Reply:

What you said in terms of drilling makes sense and you would be able to use a side-mounted jack with your A-frame pop-up without worrying about balance. What you will need to know is the weight capacity and height you need, as well as the dimensions of the A-frame where the jack will mount. For example, the Fulton F2 # F1413230134 has a 2,000 lb capacity, a lift height of 10" and fits 4" and 5" frames. Another example would be the etrailer Square Jack # MJSQ-2500B which has a 2,500 lb capacity, offers 15-3/8" of travel and fits trailer frames that are between 2" - 5" high and no more than 3" wide.

I've added a link to our page with each of our bolt-on side mount jacks for you to take a look at.

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expert reply by:
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Kyle S

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