Instructables

Make a Tandem Axle Trailer Jack

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Picture of Make a Tandem Axle Trailer Jack
If you've ever had a flat tire on a loaded trailer, you know it can be a challenge to jack it up and change the tire.  This simple curved wedge "jack"  or "chock" makes it very easy to change trailer tires and can be made in an hour from scrap wood.  The design is based on the EZ Jack Wheel Chock.  http://www.amazon.com/High-Country-Plastics-Wheel-Chock/dp/B000R5PMWE 

Here's a video of how it works for a rear tire flat.  If your front tire is flat, simply put the block behind the rear wheel and back-up.  This block can also be used to chock a tire on any vehicle or trailer by turning it upside down and jamming it under a tire.  Very handy.
 
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Step 1: Make a template of the jack

Picture of Make a template of the jack
Trailer jack.jpg
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The first thing to do is cut out a wooden template of the jack using the drawing below (pic 2).  The squares in the drawing are 1" x 1".  I created a grid of 1" squares on a piece of 1/4" plywood (pic 1) and cut it out on my bandsaw (pic 3).  Alternatively you could make your template from cardboard, poster board, or even paper but I like to use wood so I can save them for future use.
rich28712 years ago
That is very cool. I dont have a trailer, but if I did I would defiantly make one or two of these. I am going to show my brother-in-law this as he has his own landscaping business with dual axel trailers and i am sure this would be very handy,
ironsmiter2 years ago
"I considered putting screws in the sides or through and through bolts, but in the end it seemed unnessary. Good wood glue is stronger than the wood itself so I'm not going to bother with bolts or screws."


There is one reason I'd do at least 2-3 thru bolts.
Odds are good that I would end up using this in the rain.
Just my luck.
Normal wood glue, while stronger than the wood, doesn't hold up so well when wet.
Having the bolts there would ensure, after time passes, and glue joints fail, that the piece stays together and functional.
kentdvm (author)  ironsmiter2 years ago
Good point. I was on the fence, but you pushed me over;) I think I'll add some bolts. Hadn't thought about it getting wet. Thanks for the advice.
really neat project!

Great 'ible, and lovely video!
heathbar642 years ago
definitely makin some of these. I guess I would just cut them from a solid 6x6 block since I have some scraps and my bandsaw will do the depth.
kentdvm (author)  heathbar642 years ago
That was my first thought as well but with the curve of the block you need 7 1/2" for the height. You'll have to add a couple boards but should work fine.
Nice solution - with our old tandem axle we simply tipped the trailer up if the load wasn't too bad, though it was just the right dimensions to do so, then again there was always at least two of us there to do it...