Offroad trailer suspension

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Re: Offroad trailer suspension

Postby Dave Nathanson » Fri Mar 10, 2017 6:48 pm

Here are 3 photos all showing pretty much the same view; the inside of the drivers side trailer wheel. The important differences are that the first photo is with leaf springs, then second with the Timbren axle-less suspension with Straight spindle, and the 3rd photo is the same Timbren except with the 4" lift spindle.

Leaf straight axle IMG_7994.jpg
Leaf Springs & straight axle
Leaf straight axle IMG_7994.jpg (109.43 KiB) Viewed 455 times

Timbren straight spindle IMG_9217.jpg
Timbren Axle-less with straight spindle
Timbren straight spindle IMG_9217.jpg (81.01 KiB) Viewed 455 times

Timbren 4Lift spindle IMG_9342.jpg
Timbren Axle-less with 4" lift spindle
Timbren 4Lift spindle IMG_9342.jpg (74.88 KiB) Viewed 455 times
Last edited by Dave Nathanson on Fri Mar 10, 2017 7:22 pm, edited 1 time in total.
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Re: Offroad trailer suspension

Postby Dave Nathanson » Fri Mar 10, 2017 6:58 pm

Here are photos of the Timbren straight spindle and the Timbren 4" lift spindle. Both are the heavy duty 3500# models. Both of these are right-side-up. They bolt onto the top of the suspension arm. So the flat side of the spindle mount does face down. I will mention that I'm impressed with the sturdy construction of the Timbren suspension.

Timbren straight spindle IMG_8117.jpg
Timbren Straight spindle
Timbren straight spindle IMG_8117.jpg (134.63 KiB) Viewed 454 times

Timbren 4Lift spindle IMG_9215.jpg
Timbren 4 inch lift spindle
Timbren 4Lift spindle IMG_9215.jpg (79.95 KiB) Viewed 454 times
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Re: Offroad trailer suspension

Postby Dave Nathanson » Fri Mar 10, 2017 7:21 pm

More Timbren details... Yes, there is a crossbar to connect & strengthen the two side suspension pieces. Timbren says this bar is optional, but I definitely wanted it. It is a 2" square tube, bolted in at each end.
Before installing the Timbren suspension we welded on a 5 inch by 1/4 inch plate from tip to tip along each side. That might be overkill for most people, but I've torn this frame before, so I knew some reinforcement would be very helpful. Actually we had to remove some of the previous angle iron reinforcement so we could add this reinforcing plate. The secured reinforcing plate also makes it less likely that the suspension can twist in or out.
Timbren crossbar & plate IMG_9341.jpg
Timbren crossbar & plate IMG_9341.jpg (186.11 KiB) Viewed 447 times

Here is the end of that crossbar (driver's side). Timbren recommends bolting and welding it in, but that would make it very difficult to repair on the trail... As you can see, when my TD is connected to the Jeep, the lower edge of the trim is about 20" high just forward of the wheel. (ok, it is 19 7/8) Slightly lower in back, at 18.75".
Timbren crossbar end-measuring IMG_9336.jpg
Timbren crossbar end-measuring IMG_9336.jpg (53.41 KiB) Viewed 438 times
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Re: Offroad trailer suspension

Postby Dave Nathanson » Fri Mar 10, 2017 8:06 pm

For those who may still be wondering about the difference between the Timbren straight spindle & the 4" lift spindle, here are two photos. Same trailer, same driver's side trailer wheel, same suspension, but different spindle.
Timbren straight spindle from rear IMG_9254.jpg
Timbren straight spindle from rear IMG_9254.jpg (77.03 KiB) Viewed 419 times
Timbren 4 lift spindle from rear IMG_9346.jpg
Timbren 4 lift spindle from rear IMG_9346.jpg (90.49 KiB) Viewed 419 times
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Re: Offroad trailer suspension

Postby working on it » Sat Mar 11, 2017 12:11 am

Dave Nathanson wrote:...Before installing the Timbren suspension we welded on a 5 inch by 1/4 inch plate from tip to tip along each side. That might be overkill for most people, but I've torn this frame before, so I knew some reinforcement would be very helpful. Actually we had to remove some of the previous angle iron reinforcement so we could add this reinforcing plate. The secured reinforcing plate also makes it less likely that the suspension can twist in or out.
The attachment Timbren crossbar & plate IMG_9341.jpg is no longer available
....
I've torn my frame, too, ripping a hanger off the frame. Because of that, when I was going to fix it, I added a 2"x2"x 36" long, 1/4" thick angle (with spring hangers welded - and bolted) to the frame, and a corresponding length of 2" tall 3/16" thick steel to form a "sandwich" around the original frame. It has stood up to an airborne trip over a massive pothole at 75 mph, without any ill effects. I'm sure that the reinforcement resisted a landing force that would've torn/bent my un-reinforced original frame. Not overkill, but thinking ahead.
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torquing of hanger assembly (theory).png
torquing of hanger assembly (theory).png (129.98 KiB) Viewed 387 times
frame reinforcement &  spring hanger assembly installed.jpg
frame reinforcement & spring hanger assembly installed.jpg (93.55 KiB) Viewed 387 times
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