SumoSprings Maxim Rear Axle Helper Springs Installation - 2018 Newmar Canyon Star Motorhome

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How to Install the SumoSprings Maxim Rear Axle Helper Springs on a 2018 Newmar Canyon Star Motorhom


Shane: Hi, I'm Shane with etrailer.com. Today you're going to be taking a look at, I'm going to walk through the installation on the SumoSprings Maxim Custom Helper Springs for the rear axle on your 2018 Newmar Canyon Star, 26,000 pound F53 chassis. What these are going to do, these are going to help you reduce body roll and sway while giving you a more comfortable ride while you're traveling. With these big RVs, because they're so top heavy, what happens is when you get a cross wind, the top kind of leans like this. Well, what it does is it kind of pushes you over that way. Everything wants to kind of pull that way and you have to muscle the steering wheel.

Well, what the springs do is they counteract that. When it starts leaning this way, that spring compresses while the other one stretches. What happens is it wants to keep you upright. The more it keeps you upright, the straighter you're going to be in your lane, the less muscling you're going to have to do going down the highway, less fatigue you have, much better traveling you're going to have.Another thing our springs are going to do for us, they're really going to reduce the road shock we feel. If we didn't have them, what happens is our jounce stops, that are factory jounce stops that are on, when you're loaded up, what happens is you feel that kind of smack when you hit a bump.

With the spring, what it does is it compresses soft at first and then it gets stiffer, so you don't feel that hard hit or that big bump. It makes your ride much more comfortable. They're going to withstand road salts, oils and UV rays. When comparing these to airbags, once you put these in, you can leave them, there's no maintenance. With an airbag, you're going to have to monitor the air pressure, your airlines, you're going to have to run airlines, potentially get leaks in either one.Again, with these, you put them in and forget them.

These also work independently, but work together, and I'll explain that. How they do that is they're going to reduce body roll and sway. So on an RV, they're top heavy. So what happens is when you turn the corner or you get a cross wind, the top of it kind of tilts. Well, with these installed, as it tilts, the one spring is going to compress and it's going to want to push out.

While the other one spreads out, it's going to want to pull down, so it's going to try and keep you upright. These springs are also going to have a 5,400 pound weight capacity. Keep in mind that does not increase the weight carrying capacity of the RV.Now that we've gone over some of the features, we'll show you how to get it installed. To make it easier, it's a good idea to raise the back end up and take your wheels off. You can get this done without taking the wheels off if you have a right-angle drill, but it does make it a lot easier. There's a lot more room to work with the tires off. We're going to take our spring, one side is going to have four holes. Other side is going to have one. We're going to start with the side that has four holes. This is going to be our top side. That's going to be our top bracket. We're going to line this up and it's only going to fit in two of the holes. We're going to have short bolts like this, hex bolts. We'll go ahead and insert them in. Take a 9/16" socket and we'll tighten them down.We'll flip it over, and have a bracket that looks like this, going to go face down like that. We'll insert another small one and to the bottom. You're going to have three for each spring. We're not going to tighten this one just yet. We'll take it and we're going to flip it over. This bottom plate has this flange on it. The other side does too. On your driver's side, this is going to be on the inside. Passenger side, it's going to be on the outside. And what it does, it wraps right around your U-bolt on your leaf spring. What we're wanting to do is, we want to make sure nothing is on the inside of the frame rail that we're going to hit because what we're going to have to do is drill out a couple of holes for each side. That side's clear.Take a paint marker. We're going to mark this bottom hole right here on both sides. I'm going to take my marker, I'm just going to go like that. We're going to pull this back off, we'll line up the mark, 9/16" socket, we'll tighten our bolt on the bottom plate. I'm going to take a small drill bit, I'm going to drill a pilot hole for my marks. Again, make sure there's nothing on the inside of the frame that you can potentially damage.Once you get your pilot hole drilled, your two bottom pilot holes, you're going to take a 3/8" drill bit and we're going to open that hole up, actually, both those holes. What we're going to do is we're going to take one of our bolts, hex bolts, slide it through the frame rail like that. We're going to mark our top hole then you're going to repeat the process for drilling those two holes. Once you have all four of your holes drilled, we're going to slide our spring back in place. Put these in here, two on the other side.We're going to add four flange nuts and they're going to go on the inside. You're going to have two long carriage bolts like this and a bracket like this. Two carriage bolts are going to go in the square holes in the lower plate. This is going to go like this in both and then each one is going to get a flange nut. I'll take my 9/16" socket, I'm going to snug these up to the bottom of the spring. You want to make sure you go back and forth with these, so that your bracket's not leaning. You're going to take your 9/16" socket and wrench and you're going to tighten down the nuts on your upper bracket.Once you get one side done, you're going to repeat the process on the other. Reinstall your wheels and you're ready to go. Again, I'm Shane with etrailer.com. I hope this video has helped you, whether you're still deciding or installing the SumoSprings Maxim Custom Helper Springs for your rear axle on your 2018 Newmar Canyon Star, 26,000 pound F53 chassis.


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