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Mod #98: Rear Scissor Jacks Replacement

Posted By ModMyRV On August 17, 2010 @ 11:56 am In exterior, suspension | 10 Comments

This modification was designed and completed by ModMyRV member jfdrewett. This article carries a copyright. Permission must be obtained from the author before duplication or reposting.

Well, we had to flip the axles on our 5er to make it ride level with the FL70. The scissor jacks just barely reached the ground before and now blocks became a requirement. The affair was rickety to say the least and getting the trailer stable was a chore. I spent some time researching my options and nothing really appealed to me as a strong stable solution. I couldn’t find scissor jacks tall enough 31″ and stabilizer bars might work if I had a solid jack to connect them to. So I decided to get a little creative on my own.

Mod Difficulty:

I started by removing the existing jack and leaving the top brackets attached. The old jacks were 2 1/4″ wide inside the top brackets. Headed down to the local metal supply to look for some square tubing and found they had telescoping tube in exactly the right dimensions. I bought 2 - 10′ pieces of 2 1/4″ tube for the cross members and 1 - 5′ length of 2″ tube for the sliders welded to the jacks.

I had them cut the 10′ pieces to length and cut the 5′ piece in half. The cross members bolted right up to the old scissor jack brackets with no drilling (got lucky). I made some small plates to bolt the 2 crossmembers together. Next, I had a local welder attach the 2″ pieces to the square jacks and add a couple of gussets for extra strength. The jacks are about $40.00 each at Harbor Freight and rated at 3600lbs each.

The holes in the telescoping tubing are 7/16″. Home Depot has pins and keepers this size in their slide out trays in the hardware department (got lucky again).

When you’re not using the jacks you just pull them out and rotate 90 degrees, then slide them in and pin them.

It takes more time collecting the parts than to install this setup and I’m happy to say our trailer is rock solid now.

Tip
If you have one of those “If this trailer is rockin” stickers on your rig you will need to remove it.


ModMyRV recommends these parts for this mod:

Bulldog Square Tube Trailer Jack - 5000lb. Capacity
3500 Lb. Capacity Drop Leg Trailer Jack
7/16 X 3 - 2-9/16 Cotterless Hitch Pin


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