How To Replace A Leaf Spring On A Double Axle Tent Trailer

How To Replace The Leaf Springs On A Dual Axle Trailer

It is not difficult to replace a leaf spring as long as you have the required equipment and the correct size leaf spring to replace the old one with. Keep in mind that the most important thing to remember is to always be safe. Make sure that your trailer is properly jacked up and that all of the nuts and bolts are tightened to the right poundage. Also see: Best Weight Distribution for further information. Sway-controlling hitches are available. In our travel trailer, we recently experienced a leaf spring failure while traveling along a rocky roadway.

Further investigation revealed that the leaf spring on the front axle of our travel trailer’s passenger side had entirely fractured on one end, which we had not discovered.

We were in a jam and had to enlist the assistance of a professional to repair the damaged leaf spring.

Replace leaf springs on a tandem or dual axle trailer in pairs at all times to avoid damage to the trailer’s suspension.

  1. We decided to replace them all with leaf springs that were a little more heavy duty because it seemed like the safest bet at the time.
  2. We are not professionals, and any work you perform on your RV or trailer is done entirely at your own risk and responsibility.
  3. Only perform what you believe is within your range of abilities.
  4. Also see: Best Tire Pressure Monitoring System (TPMS) for Recreational Vehicles

We How To Measure For A Replacement Trailer Leaf Spring

The most difficult aspect of changing leaf springs on any trailer is determining the appropriate size. There are a plethora of different sorts available, and you want to find the one that is the closest fit. One of the first things you’ll want to find out is what the weight rating of your trailer axles actually is. Most of the time, this information may be found on the axle itself. In most cases, there is a sticker on the vehicle that indicates the weight rating. If you can’t find the information you need there, you may need to contact the trailer’s manufacturer or consult the owner’s handbook.

  • Our travel trailer is equipped with a double eye leaf spring (click here to see it on Amazon), but there are several options available, including slipper springs with a hook end and slipper springs with an open end.
  • In order to properly measure for a new double eye leaf spring, you must measure from the center of one eye to the center of the other.
  • When measuring for a double eye leaf spring, measure from the center of one eye to the center of the other eye.
  • If your leaf springs are ancient, like ours were, it is possible that they have flattened out a little bit as a result of time.
  • Given that we were unable to remove the spring first, we calculated the distance between the spring on the trailer and attempted to select the spring that was as near as possible in terms of leaf count, weight rating, and breadth to the original spring.
  • We discovered that the majority of four-leaf travel trailer leaf springs measured around 25 1/8 to 25 1/4 inches from eye to eye.
  • We also received springs that were rated for a bit more weight than the ones that came with the vehicle.

We made the decision to purchase 6,000 pound leaf springs.

The only difference was that a couple of the leaves on the fresh ones were somewhat longer than those on the old ones.

It is not necessary to replace the old leaf springs with larger ones or ones that are rated for higher weight than the previous ones.

If you purchase leaf springs with a poundage that is too high, they will not be able to move under the weight of your trailer.

It makes little difference whether your leaf spring is installed on top of the axle or underneath it; the procedure is nearly same.

To repair the leaf springs on a dual axle trailer, you will only require a few tools, which will include replacement leaf springs and u-bolts, among other things.

Other Trailer Suspension Parts You Will Need

Once you have determined the right size of leaf springs, you will also want a few other parts in order to complete a full replacement. When you replace any leaf springs, you should always make sure to replace the U-bolts (click here to see them on Amazon). U-bolts should never be reused due to the fact that they expand when they are tightened to the appropriate tension. When you unscrew a U-bolt, the nut will frequently cross thread on its way out, and a reused U-bolt may come free over time as a result of the cross threading.

  • Make sure you know what sort of leaf spring you’ll need based on the size and style of the one you’re using before you buy it.
  • Another item you may want to think about upgrading is the shackles and equalizers on your bike (click to view on Amazon).
  • You can change the shackles while keeping the old equalizer if you so choose, although it is occasionally preferable to replace both at the same time.
  • Please keep in mind that the shackle/equalizer kit for a tandem axle trailer that I linked to may not be the precise one that you want for your particular trailer.

Tools You Will Need

Some of the most fundamental tools you’ll need are as follows:

  • A torque wrench with a maximum torque of 150 ft-lbs (click here to see it on Amazon)
  • Sockets in a variety of sizes
  • Depending on the form of your trailer, you may require the thin wall/deep style sockets to remove the tire. (Click here to view on Amazon.) In order to dislodge difficult lug nuts and bolts on the leaf springs, you’ll need a breaker bar (click here to see it on Amazon). Rust Penetrant, which may be used on rusted nuts and bolts (click here to see it on Amazon)
  • A jack that may be used under the axle. We utilized a 2-ton floor jack to elevate the axle into position because it will fall after the leaf springs are removed. It does not need to be heavy-duty, just powerful enough to lift the axle into place. (Click here to see it on Amazon.) Jacks are used to raise the trailer so that the tire may be removed. Make certain that the jacks you choose are heavy-duty enough to properly raise your trailer. We utilized two 4 ton jacks for this job. Bottle jacks are really effective, and two are highly suggested. (Click here to see it on Amazon.) Jack Stands, especially if you are only using one jack (click to view on Amazon)
  • A hammer, ideally rubber, which we wished we had while we were replacing our jacks during our replacement. (Click here to see it on Amazon.)

Depending on how rusted the objects under your trailer are, you may also want a grinder (click here to see one on Amazon). Sometimes it’s necessary to cut the U-bolts in order to remove the leaf springs completely.

How To Replace The Leaf Springs On A Tandem/Dual Axle Trailer

Having assembled all of the materials and equipment necessary for the job, it is time to begin the process of replacing the leaf springs. At this point, you may wish to spray rust penetrant on all of the nuts and bolts that you will be dealing with to make them simpler to remove later on in the process.

1. Break The Lug Nuts

The first thing you should do before doing any lifting is to remove the lug nuts from the tires. You must do this first because if the lug nuts are too tight or a bit rusted, you will not be able to loosen them as readily once the tire has been lifted off the ground and rolled about. Although you don’t want to remove the lug nuts completely, you should finish the initial spin so you know they will come off easily later in the process.

2. Jack Up The Trailer

Depending on the size and weight of the trailer, this might be a very simple or a rather complex process to do. Given the weight of our travel trailer, which weighs 9,000 pounds, it needed two huge jacks to lift one side of the vehicle. The jacks should be placed near to the wheels, and the frame should be used to elevate the vehicle. Place the jack close to the tires and elevate the frame using the jack. Make certain that you use wheel chocks on the other side of the trailer so that it will not be able to move.

Make certain that the trailer is lifted evenly with both jacks if you are using two jacks to lift it off the ground. Once you’ve positioned the trailer where you want it, you may reduce the weight of the trailer onto jack supports or build up jack stands for further security.

3. Remove The Tire

You may now remove the first tire from the vehicle. I only remove one tire at a time because I like to have a spare tire on hand in case something goes wrong with the first one.

4. Position Jack Under Axle

After that, you may position the jack under the axle from which you just removed the tire. I like to use a little floor jack, although a bottle jack will also suffice. Make sure you have a floor jack and block of wood or jack stand under the axle before you begin removing the leaf springs from the vehicle. Also, just in case something happened to the jack, I put a piece of wood behind it for added protection. Once the leaf spring is removed, the axle will collapse if there is nothing to catch it in the process.

5. Start Loosening Bolts

It’s time to go to work on all of the nuts and bolts that are keeping the leaf spring in place for the first time! I began by loosening the nuts on the top center of the leaf springs, which were a tight fit. The ones that are attached to the U-bolts are the ones that are visible. Depending on how rusted the bolts are and how stubborn they are, you may have to chop them off afterwards. Disengage the U-bolt nuts and leaf spring shackle bolts before removing them from their mountings on the frame.

If you start with the central bolt, the one that connects to the shackle of the equalizer, it will be easier to complete your task.

If they are stubbornly refusing to budge, you may use a torch to heat the bolt, which should help to loosen it.

If you use the jack to raise the axle a little bit, it may be simpler to get the bolt out of the axle.

6. Remove U-BoltsLeaf Spring

When the primary bolts that attach the leaf spring to the trailer are removed, you will discover that the only thing holding the axle in place is the jack that was used to secure it. Be extremely cautious not to place your hands, feet, or legs under the axle in case it collapses. You may now proceed to remove the nuts that are keeping the U-bolts in place. Remove the U-bolts and U-bolt plate from the vehicle and the leaf spring will come off with them.

7. Place New Leaf Spring

There will be a bolt on the top and bottom of your new leaf spring, as well as in the center. In accordance with the design of your trailer’s suspension system, this bolt will align with the leaf spring hanger located either at the top or at the bottom of the axle. It will also assist you in locating the middle of the leaf spring. To center the leaf spring on the axle mount, tighten either the top or bottom bolt. After the leaf spring has been installed, you may proceed to install your new U-bolts.

You may either utilize the new ones or re-use the old ones if the old one appears to be superior.

It is all up to you. Except for the old U-bolts and nut assemblies, there is nothing else that should be recycled. The U-bolts should be snugly tightened at this point; you do not need to torque them to the proper poundage at this point.

8. Insert The Bolt Equalizer Side First

The bolt may now be threaded into the eye of the leaf spring on the equalization side of the spring (inside). Due to the possibility of having to change the axle position in order to get the holes to line up with the other side, it is easier to complete the equalization side before the other. If you need to replace the shackles, you can do so at this time. For further information, see How to Connect Multiple 12V or 6V Batteries to an RV. The bolt passes through the first shackle, then through the leaf spring eye, and then through the second shackle to complete the circuit.

First, pass the first eye bolt through the equalization side of the equalizer.

The suspension system on the trailer is designed to allow for unrestricted movement, which means that the nut should be tightened just enough to keep it in place while still allowing you to move the shackles around.

9. Insert Bolt On Other Eye Of Leaf Spring

The bolt may now be threaded into the eye of the leaf spring on the equalization side of the equalizer (inside). Due to the possibility of having to alter the axle position in order to get the holes to line up with the other side, it is easier to complete the equalization side before the other two. Changing the shackles is something you can do right now. For further information, see How to Connect Multiple 12V Or 6V Batteries to an RV. Once through the first shackle, the bolt travels through the leaf spring eye, and then through the second shackle.

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In order to install the first eye bolt, start with the equalization side of the equalizer.

The suspension system on the trailer is designed to allow for unrestricted movement, which means that the nut should be tightened just enough to keep it in place, but you should be able to move the shackles about as you choose.

10. Remove Axle Jack

Once you have properly fitted the U-bolts around the leaf spring and axle and have secured the bolts to the leaf spring eyes, you will be able to remove the jack that was supporting the axle in the upright position. When you remove the jack, the axle will be supported by the leaf spring, which you should replace.

11. Use Torque Wrench To Tighten U-Bolt Nuts

Earlier, you tightened the nuts on the U-bolts to ensure that they were secure. It’s time to tighten the U-bolts to the required poundage so that they can stretch firmly around the axle and leaf spring while still allowing for the necessary amount of movement in the vehicle. Also see: The Surprising Differences Between 30A50A RVs and Other RVs To determine the proper torque poundage, you will need to consult the U-bolt manufacturer’s recommendations. The suggested torque for the U-bolts on my trailer was 70 ft-lbs, which I followed.

12. Replace Trailers Tire

The tire may now be reinstalled when everything has been adjusted and fastened to your satisfaction. Keep in mind that the lug nuts should be tightened in a cross pattern. Tighten the lug nuts as much as you can by hand or with a tiny wrench to ensure that they are secure.

Once the lug nuts are tightened, you may begin lowering the trailer carefully and evenly until you are able to remove the jacks completely. Complete the process by tightening the lug nuts to the specified torque.

13. Finish Tightening Lug Nuts

It is now time to reinstall the tire once it has been tightened and fastened properly. Maintain a cross-pattern pattern when tightening the lug nuts. Apply as much force as possible to the lug nuts, either by using your hands or by using a tiny wrench. Now that the lug nuts are securely fastened, lower the trailer carefully and evenly until the jacks may be safely removed. Complete the job by tightening the lug nuts to the specified torque.

14. Replace The Rest Of The Leaf Springs

It is never recommended to replace a single leaf spring; instead, they should be changed in pairs or in their whole. If you simply change one of your trailer tires, it may result in uneven wear and faulty alignment of your trailer tires. Replace all four leaf springs if you are replacing one that is of a different size than the one you are replacing.

15. Check Everything After Your First Trip

After you’ve completed the necessary repairs, you should do a routine inspection of all of the nuts and bolts. For the first few kilometers of the journey, this is very vital. It is also advised that you re-tighten all of the lug nuts on your tires after traveling around 50 miles. How to replace the leaf springs on a tandem or dual axle trailer is demonstrated in the video above. The procedure is essentially the same for a single axle trailer; the only difference is that there is no equalization to contend with.

Leave a remark in the section below.

How To Replace A Leaf Spring On A Double Axle Tent Trailer

Replace the leaf springs on a tandem or dual axle trailer using this guide. The Lug Nuts Must Be Broken. Lift the trailer with a jack. Remove the tire from the vehicle. Place the Jack under the axle. Begin by loosening the bolts. Remove the U-Bolts and the Leaf Spring. New Leaf Spring should be placed here. Insert the Bolt Equalizer Side first, followed by the Bolt Equalizer Side.

How do I know if my leaf springs are bad on my trailer?

Instructions on how to check the leaf springs on your trailer for wear and defects. Cracks and fracture should be looked for. Cracks in trailer springs can cause damage to the tire and axle, as well as failure of the suspension system and the entire trailer as a result of the damage. Keep an eye out for symptoms of rust. Keep an eye out for spaces between them. Ensure that the springs are lubricated.

Can you pull a trailer with a broken leaf spring?

Although it is technically possible to drive a truck with a damaged leaf spring, this does not imply that you should. Driving a truck with a damaged middle leaf may cause your vehicle to become unstable, but it is not very dangerous if you limit your driving to the nearest and safest locations.

How are leaf springs attached to the axle?

The leaf springs can be overslung (i.e., put over the axle) or underslung (i.e., placed under the axle) (placed under the axle). However, the U-bolts are installed around the axle and hold it to a metal plate that sits on the leaf springs in any case, according to the manufacturer.

How do you change a leaf spring?

For those who are new to installing leaf springs, here is a simple step-by-step tutorial. Step one is to get ready.

Before you can install new springs, you must first prepare the existing suspension. The second step is to raise the vehicle. Step 3 – Take the Springs out of the way. Attach the eye bolts in the fourth step. Step 5 – Fasten the U-Bolts in place. Step 6 – Drive the vehicle down to the ground.

Can you put heavier springs on a trailer?

On your tandem axle boat trailer, you may utilize heavier-duty leaf springs, such as partSP-218275, to support the axles. You will have no trouble installing the new springs because the dimensions of the old springs are identical. Weight capacity of your trailer will not be increased by installing heavier springs on it.

How hard is it to change leaf springs?

Located in the suspension system of a car, leaf springs play an important role. After you have raised the car using a floor jack, it is rather simple to replace them on your own with basic tools. The springs are secured to the brackets below the automobile with a few fasteners.

Is it possible to weld a broken leaf spring?

Our response is always a no. Welding should not be done anywhere near or on your springs, much alone on them. Due to the fact that heat causes spring steel to de-carbonize and lose tensile strength, the region surrounding the weld becomes brittle, similar to a cheap pencil, springs are not recommended for usage in high temperatures. Your springs will break far more easily as a result of this.

Can I replace just one leaf spring?

A used leaf spring is often interchangeable with a new one as long as they are both the exact same size, which is rare but possible. As a result, when you replace an old leaf spring with a copy, the performance of the vehicle will be restored to its previous operating state.

How much does it cost to replace leaf springs?

If you hire a professional to replace your leaf springs, the typical cost will be between $450 and $790. Along with the springs and components, these figures take into consideration the cost of labor. Depending on where you live, the cost of the installation alone might range from $95 to $170.

How do I know if my leaf springs are worn out?

Check for these telltale symptoms that your leaf springs are in need of replacement: While your truck is moving, you may hear squeaky sounds. On one side, I’m slouching. Back sags and sags some more. Handling has been reduced. Having difficulties carrying and dragging loads. The suspension has reached its limit. Cracks appear on the leaves.

How long should leaf springs last?

For a conventional pickup truck or van, a set of leaf springs will typically last around 200,000 miles before needing replacement. This is not a hard and fast rule, and some vehicles will break their springs with significantly fewer than 200,000 miles on the clock, while others will go far more than 200,000 miles before they fail.

What does a bad leaf spring look like?

Some of the most common signs that your leaf springs need to be replaced When driving, you may have difficulty steering or your car may pull to one side. Even the smallest bumps on the road may be felt as you drive along the road. You may see your truck doing a nose dive, leaning back or rolling with velocity.

Can you drive on broken leaf spring?

Although it is technically possible to drive a car with a damaged leaf spring, this does not always imply that you should. Driving your car with a broken leaf spring might potentially make it unstable, but it is not too unsafe to drive a short distance with a damaged leaf spring.

How do you adjust the angle on a leaf spring shackle?

Because you don’t have the whole weight of the spring pack on your shoulders, you can remove everything but the primary leaf.

Measure the flat length of the spring back from the center of the front spring eye (54′′ or 60′′, depending on the application). Indicate the plumb line at 0°, and then use your sliding bevel/protractor/angle finer to mark the shackle angle you require.

How do you release the tension on a leaf spring?

To remove the U-bolts, loosen them using a wrench. After that, just slide the bolts out of the axle. Because the bolts are horseshoe-shaped, they stand out and are easily distinguished when compared to the leaf spring. If you have an additional floor jack, you may use it to relieve some of the stress on the spring, making it simpler to remove the bolts from the vehicle.

Can you fix a broken leaf spring?

Depending on the general quality of the spring pack, it may be possible to restore damaged spring leaves in some instances. We just remove the damaged leaf and replace it with a spring steel that has been hardened. After that, we may re-arch the spring and restore it to, if not improve, its original arch and load capacity.

Do leaf springs go above or below the axle?

Answer from an Expert: You have the option of mounting trailer axles above or below the leaf springs. The only thing that would be different is the amount of ground clearance that the trailer would wind up with. You would have a lower center of gravity if the spring were below the axle (the trailer would be lower). This is the most significant advantage of having the spring below the axle.

Should leaf springs be lubricated?

To ensure that the springs last as long as possible, they should be kept reasonably clean. Modern leaf springs do not require lubrication with oil, which might cause harm to any anti-friction material between the leaves if done incorrectly. Instead, lubricate them using a silicone-based lubrication spray.

How often should trailer leaf springs be replaced?

To ensure that the springs last as long as possible, they should be kept relatively clean. Because modern leaf springs do not need to be lubricated, any anti-friction substance between the leaves is not damaged. Instead, use a silicone-based lubricant to spray on the irritated areas.

RV.Net Open Roads Forum: Travel Trailers: Broke Trailer Leaf Spring

Topic:Broke Trailer Leaf Spring

Posted By:NJ6PACKon 08/20/13 08:55am
I just completed a 1,252 mile trip with no problems except for the last 528 yards.Turning onto my street yesterday I heard a loud BANG! when I got to my house I noticed that the leaf spring on the front axle broke. I guess I’m lucky it happed on my street a few houses away.Looking back I noticed the TT was slightly leaning to the side a few times I thought it was the road angle I guess the spring was getting weaker and starting to go.I obviously have to replace the broken leaf spring but I am thinking that I should replace all the leaf springs with heavier duty ones.Both axles are rated at 3500lbs The GVWR of the TT is 7500lbs (I guess the mfr figures the remaining 500lb difference between the two axles is for the hitch).I’m not sure what the springs should be rated at so I am going to remove the broken spring today and bring it to the local spring shop and see what they say.A few years ago I added the Dexter EZ Flex after a Shackle broke so I’m Good as far as that’s concerned (including wet bolts).If I go with heavier springs is that a good idea and if so how much heavier, 500lbs or 25%Will heavier springs raise my trailer height?.That would be fine because my TT rides low to begin with, I don’t want to do a axle flip.Does anyone else have any thoughts on this or experience with this?Thanks.Chris

2007 Max Lite ML28 RS 1999 Ford E 350 Super Duty 15 Passenger Ext Van6.8L V10/3.73 Gears

Posted By:nevadanickon 08/20/13 09:03am
I would think twice about going to a stiffer spring. It will ride stiffer and beat up the trailer more. Springs break, its just fact. We used to break one once in awhile on horse trlrs and it was always empty when it happened.

Posted By:the bear IIon 08/20/13 09:05am
I had the same thing happen.Turned onto our street (off camber turn)and bang.I put on heavier capacity springs +500 lbs and the EZ-Flex all the way around.It raised the trailer about an inch from the old (sagging) springs.On the Dexter website you will find a graphic showing what measurements you need to provide for heavier springs.I got mine at a local trailer repair/supply shop.Dexter folks suggested getting them locally to save on shipping costs.

Posted By:dbblson 08/20/13 10:37am
It looks like the two bottom leaves were already broken, they are rusty, and the two top ones are a fresh break.I have had many broken springs, it is just a fact of life. It seems like it is time to replace all the springs.

2011 F-350 CC Lariat 4X4 Dually Diesel2012 Big Country 3450TS 5th Wheel

Posted By:mleekampon 08/20/13 10:58am
My thought is that either the spring steel used to make the leafs was bad to begin with or bad heat treating (too brittle), or a combo of the two.Unless its overloaded, I doubt the spring rating should have been an issue.But next size up would not hurt either.I agree though, replace both sides for peace of mind.

2019 Jayco Redhawk 29XK Class C, Ford V10 E450 with Roadmaster Hitch Mounted Spare Tire holder, Bigfoot Hydraulic Leveling

Posted By:spike99on 08/20/13 10:59am
.If replacing 1 x set of leaf springs, its always best to replace both sets (on same axle) at same time.Unknown to some, not all leaf spring sets are the same.Using leaf spring set from company A and leaf spring set from company B on same axle will have different flex behaviour.Bad thing to have on same axle.Thus, best to buy matching leaf springs sets.For me, I always upgrade to next size up when my leaf spring packs need replacing.For example, if factory leaf sets are 3,200 lbs, I upgrade to 3,600 lbs sets.If leaf packs are 4,200 lbs, I upgrade to 4,600 lbs sets.Always next size up.Their extra buffer allows for those double rail-way tracks and end of driveway bumps.Is “next size up” that rougher?I’ve never noticed a difference.Especially since (IMO) most trailers are built within under sized leaf spring packs at factory (to save them build costs) anyway.If it was my trailer, I’d upgrade all 4 x sets and go “next size up”.And to make smoother ride, I’d replace the factory solid Yoke system with new technology smooth rid system.Something like:- Click Here -or- click here -.* This post waslastedited 08/20/13 11:23am by spike99 *

Posted By:spike99on 08/20/13 11:21am
.Just noticed you did previously install “Dexter EZ Flex” under your TT.I like their “smooth ride” technology product @- Click Here -If you only want to raise your trailer 3″ instead of 5-6″ from axle re-position, I would simply:- Reposition the axle “under the leaf springs”.Yes, this raises the chassis 5-6″.- See your above picture and its 6″ or so distance from frame to existing shackle bolts.Simply drill new holes between this distance.This will lower the chassis 3″.Thus, total raised trailer is now 3″ higher.- If drilling holes isn’t your thing, simply take your trailer to any welding shop.They will easily drill the needed holes (in in leaf spring hanger) for you.If this was my trailer and I only wanted to raise total of 3″, I’d investigate this option.Hope this helps.

Posted By:69 Avionon 08/20/13 04:21pm
I would change all the springs out with quality 3,500to 4,000per axle springs.I wouldn’t leave one of those spring sets on that trailer.Springs are cheap, but buy US made quality springs.

Ford F-350 4×4 Diesel1988 Avion Triple Axle Trailer1969 Avion C-11 Camper

Posted By:Huntindogon 08/20/13 05:08pm
I had a spring break on my last TT. I upgraded one size. When I went to buy them, I found that my size wasn’t a standard one and they had to be ordered. So after replacing them all, one of the takeoffs became a part of my emergency kit. I could just see my luck, breaking another spring in a remote area and no replacement to be had.Never needed that old spring, but that was likely cause I had it.

Huntindog100% boondocking2021 Grand Design Momentum 398M2 bathrooms, no waiting104 gal grey, 104 black,158 freshFullBodyPaint, 3,8Kaxles, DiscBrakes 17.5LRH commercial tires1380watts solar,800 AH Battleborn batterys2020 Silverado HighCountryC CD/A 4X4 DRW

Posted By:time2rollon 08/20/13 06:59pm
My springs were sagging and throwing off the alignment.I also have 3500axles and 7880 GVWR.Replaced the 1750springs with 2250and it rides better than ever.Did the wet bolt etc at the same time.2001 F150 SuperCrew2006 Keystone Springdale 249FWBHLS675w Solar pictures back up

Posted By:NJ6PACKon 09/10/13 07:55am
UPDATE!Sorry for the long delay in getting back to this post. I got back from vacation and have been busy with “life” since thenI ended up replacing all the springs and U bolts. After I removed the broken spring I noticed another spring was broken so all were replaced.The local spring shop also recommended changing all the springs and going up to the next weight ratingChanging the springs was not the hard to do just time and suffering laying under your TTI already had the wet bolt kit from the Dexter EZ Flex that I installed 2 years ago.The spring shop was a big help, They showed me some tricks and how to do it step by stepI road tested the TT doing slow S turns in a parking lot and some highway driving and all seems good. The TT sits nice and level now.If anyone need a good spring shop I would recommend R H Spring in Wall twsp NJ they are next to Wall Speedway on Rt 34Thanks again for every ones help and insight.

Posted By:Downwindtracker2on 09/10/13 10:35am
My father always said,”Springs snap on the bounce down.” I think he was right. On a 1/2t Dodge, I broke a set, the ’76s had a bad batch of springs. It was used empty on rough gravel roads, it also had the original worn out shocks. I broke twosets of springs on a 8′ tent trailer, the last one were long1750s,again no shocks, same type of roads.Most of you will never do those kinds of roads, but I was glad when I saw our Outdoor RV had shocks.

Adventure before dementia

Posted By:wrenchbenderon 09/10/13 01:57pm
I can join the chorus, had the same problem. Replaced the axle and springs. Now I have a 3k TT and a 10k axle and spring setup.

Posted By:SC camperon 09/10/13 04:51pm
Ive never had one break. How far can you drive with a broken spring to get off the road and somewhere to repair?

Posted By:sjturboon 09/10/13 05:24pm
I have had springs break on two different trips! Not fun to be sure! As you have probably heard already replacing with heavier springs will likely shake every thing else harder. That may result in frame or interior structural damage.Both times I replaced with the same spring type.

10k – 12k 3 000 LB Springs for Axle Trailer Leaf Spring Replace Kit Tandem for sale online

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  • This kit arrived in the condition that was expected. The process of installation was straightforward. With the exception of the central shackle being approximately one inch too short, it is otherwise perfect. This shackle is struck by the front or rear springs when they rotate towards it from either direction. I would get a central shackle that is approximately one inch larger in length. Overall, it’s a powerful piece that serves its job well. Yes, the purchase has been verified. 5 out of 5 stars for condition
  • Brand new sbygcs1952 21st of December, 2021

Great fit and easy replacement.

  • Excellent fit and simplicity in replacing an old, worn-out trailer suspension. Purchase was verified: Yes|Condition: Brand new

Can’t Expect Anything Else For Price

  • Everything is installed on my trailer and appears to be of high quality
  • Now it is time to put it to use. Purchase was verified: Yes|Condition: Brand new

Happy with it. Working good so far.

04-17-2016, 05:47 PM 1
Senior MemberJoin Date: Dec 2012Location: TulsaPosts: 438 Leaf spring Broke driving down the road,

Had a leaf spring break going down the road. Is this a normal problem. Had to jack it up and put a block between the axel and the frame to limb it to camp. Thinking about replacing the other side. It was a real pain replacing out of town on a weekend and trying to find parts._- 2008 Jeep Grand Cherokee Diesel2013 Salem Cruise light 19bh Hensley Cub hitch,

04-17-2016, 11:54 PM 2
Senior MemberJoin Date: Oct 2015Posts: 1,502 I’ve seen it happen in areas where the camper is towed off road in order to get to teh boon dock camping sites.
04-18-2016, 07:28 AM 3
Senior MemberJoin Date: Apr 2013Location: IdahoPosts: 2,058 I broke a leaf on my popup last spring on the first trip to Moab. Changed both when I got home. I was lucky, only a leaf broke, not the entire assembly.And when I lived in Moab, I off-roaded the trailer, so I was not surprised._Trailer: Lifted 228BH, heavy duty springs and Yokohama tires DELAMINATED ROOF TV: 2016 GMC Sierra Z71 4×4 CC, SLTSpare TV: Two Alaskan MalamutesLiving somewhere in ID; previously lived in Moab UT; previous to that, don’t ask!
04-18-2016, 07:32 AM 4
Always LearningJoin Date: Nov 2011Location: Four Corners, FLPosts: 21,245 Not normal, but certainly not unheard of. And, I would personally replace both sides (well, have someone replace both sides)._Officially a SOB with a 2022 Jayco Precept 36C on orderCheckout my site forRVing tips, tricks, and info| Was a Fulltime Family for 5 years, now we’re settlin’ down for a spell
04-18-2016, 08:06 AM 5
Senior MemberJoin Date: May 2015Posts: 1,231 I’ve heard of it happening on occasion. You’re fortunate the axle didn’t move out of alignment and do some damage. The trailer shop guy who replaced my boat trailer springs informed me there’s a significant difference in price and quality between Chinese and American spring steel. Chinese-sourced springs last about three years in a saltwater environment where American springs last much longer. I suspect there’s a parallel with towed RVs because I would think the mfgrs. are sourcing the cheapest springs._-2005 F350 Superduty Crewcab, 6.0, 4wd, short bed, 3.73 gears; -2016 Montana 3711FL, 40′-2014 Wildcat 327CK, 38′ SOLD
04-18-2016, 08:10 AM 6
Senior MemberJoin Date: Jul 2010Location: WaynesvillePosts: 14,428 Your Lucky, a boat trailer broke a Leaf spring and the Axle Pivoted and went Under the Trailer! The BAD part was it Happened on the I-75 Bridge that Crosses the Ohio River in Cincinnati, at “Rush Hour on Friday Night”!It can happen!Youroo!_
04-18-2016, 08:34 AM 7
Senior MemberJoin Date: Jul 2012Location: Orange TexasPosts: 790 I would replace all the springs and if you do not currently have them, consider replacing all bots with “Wet Bolts”._2013 Crusader 330 MKS2013 Chevrolet Silverado LT 2500 D/A
04-18-2016, 11:35 AM 8
Senior MemberJoin Date: May 2013Location: La Mirada, CAPosts: 528 I’ve had two springs break on our Cardinal. Make sure you replace with exact match or better change both sides._Gary and Donna2005 Cardinal 33TS-LXTrail Air pin boxCenter Point suspension2018 Ram Laramie 3500 6’4″ box 2WDDemco AutoSlide 18k
04-18-2016, 02:20 PM 9
Senior MemberJoin Date: Nov 2014Posts: 593 Contact a spring shop and get new springs from good steel. Same with spring shackles and bolts.
04-18-2016, 04:38 PM 10
Senior MemberJoin Date: Dec 2012Location: TulsaPosts: 438 I feel real lucky! We had been out on highway doing 65 miles per hour. We were real close to the campsite when it broke. Might of been going 25 miles per hour. Got a little damage to the fender well. I replaced with the only leaf spring could find on a Sunday. Attwoods and Tractor supply was cheap but it lined up and right length. But got me home and seems to track good. I will never buy a single axle trailer again. Will post some pictures later.Thankful for beer!_- 2008 Jeep Grand Cherokee Diesel2013 Salem Cruise light 19bh Hensley Cub hitch,
04-18-2016, 06:03 PM 11
Senior MemberJoin Date: Dec 2012Location: TulsaPosts: 438 Pictures of the after the leaf spring break. Really wasn’t to bad. One of the pins have a straight knurl on the pin. Make it hard to get out without cutting it apart. Fun times at the camp site. I will be better prepared for next time. Planning to replace the other side and all the shalks and pins.Thinking about rhinoliner the tear in the fender well. Any thoughts on a new fender well._- 2008 Jeep Grand Cherokee Diesel2013 Salem Cruise light 19bh Hensley Cub hitch,
04-18-2016, 06:13 PM 12
Some guy in back.Join Date: Sep 2011Posts: 218 ohhh.exciting in a bad way! I hade two leaves break in the pack on a double axle trailer that was brand new. One pivoted out far enough to slice up a tire on the way out of town. AAA put on my spare but neither of us noticed the broken leaf presenting a knife edge.the second tire was sliced in 30 seconds! I spent the night on a small cross street to the interstate in the middle of nowhere and got a lot of help from the emergency road service StarCraft provided with the new trailer. They handled finding a shop, having someone come out the next morning, getting a new spring and mounting two new tires. It was painlessly painful. So it does happen, and from the corrosion, had happened some time ago, perhaps during delivery even. Clue-not all the tires were matching when I bought the trailer._ChateauV10St. Charles, MOEx-SF Bay Area’99 Ford E350 V10’16 Rockwood 8329SS
04-19-2016, 08:02 AM 13
Senior MemberJoin Date: Jul 2011Location: New YorkPosts: 323 Not that uncommon at all when you have a good amount of weight on a spring that has an issue already in it. Have had to replace many sets in trucks i have worked on over the years.With a light duty SUV like the jeep you have, yes you should do the pair!_B.Smith2010 Cedar Creek Silverback 35ts2001 GMC 2500HD w/ Allison8.1
04-19-2016, 08:09 AM 14
Senior MemberJoin Date: Jul 2010Location: WaynesvillePosts: 14,428 Thats the Nice feature about “Liteflex” springs they “Give a Visual Warning” before they fail and No Rust!Youroo!_
04-19-2016, 05:03 PM 15
Senior MemberJoin Date: Dec 2012Location: TulsaPosts: 438 Youroo thanks for the tip will check into the Liteflex springs. I bought the only spring I could find on a Sunday morning. Was Thankful to get the part. But knew it was cheap and wouldn’t last._- 2008 Jeep Grand Cherokee Diesel2013 Salem Cruise light 19bh Hensley Cub hitch,
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RV Suspension Basics

When it comes to RV maintenance, the roof, batteries, and furnace are generally the first things that spring to mind. But there are other components to consider as well. Trailer and fifth-wheel suspension systems are sometimes disregarded; nonetheless, a well operating and properly maintained suspension offers a safe and comfortable towing experience. Modern suspension systems act as attachment points between the trailer’s axle(s) and its frame, allowing the trailer to move freely. As you go over bumps and potholes, the suspension system maintains the tires in touch with the road while simultaneously absorbing and dampening the jolting effect that road-surface defects might create.

Leaf-Spring Suspension Systems

Due to its mechanical simplicity and low cost, leaf spring suspension systems are used by the vast majority of trailer and fifth-wheel suspension systems. Leaf springs are comprised of a main spring with eyelets at either end and a series of increasingly shorter springs that are all connected by a central bolt. The stiffness of the leaf spring and the amount of weight it can hold are determined by the length, breadth, contour, thickness, and number of leaves on the spring. Leaf springs have been used in suspension systems for centuries, though modern manufacturing techniques have greatly improved their strength and reliability, as well as how smoothly or “softly” they perform their functions when compared to their medieval forebears.

  1. The excessive wear on this equalizer is the result of a pivot bolt that cut a slit through the middle of the instrument.
  2. The rear of the leaf spring is attached to a spring shackle at the back of the vehicle.
  3. In the design of leaf springs, an arch is included, and the contour of this arch is part of the spring design for a certain function.
  4. As the spring compresses, the spring shackle permits the spring to travel backward and upward as needed.
  5. They make use of a component known as an equalizer to distribute weight between the axles when going over bumps and crests of hills.
  6. In the worst-case situation, a major bump crossed by the front axle of a tandem suspension might force the wheels/tires of the rear axle to lift off the ground if there is no equalization installed between the two wheels.
  7. Equalizers are attached to the trailer’s frame through a central hanger that is welded to the frame.
  8. The majority of trailers and fifth-wheels are fitted with equalizers in the shape of a triangle, which are composed of solid steel.
  9. For the purpose of reducing friction between the bolts and the suspension components, bushings — commonly composed of nylon — are installed in the eye of the leaf springs and the equalization of the suspension.

Better-quality, higher-priced systems include brass or bronze bushings, and the suspension bolts are equipped with zerk fittings, which let the user to add grease as needed during maintenance.

Torsion-Axle Suspension Systems

A smaller sector of the trailer market employs a different style of suspension that does not use leaf springs, which is described below. Torsion axles are made of a steel axle tube that is square or roughly triangular in shape, an inner steel bar that is also square or triangular in shape, and three or four rubber “bars” that are placed inside the axle tube between the exterior tube and the inner bar. Torsion axles are used in vehicles with a square or triangular wheelbase. The wheel spindle is attached to the inner bar by means of a trailing arm that is affixed to it.

  • This “pinching” or squeezing pressure is what gives the suspension support and motion.
  • A greaseable “wet bolt” includes a zerk fitting in the head of the bolt as well as a channel that allows grease to enter the gap between the bolt and the bushing when the bolt and bushing are connected.
  • The MORryde package contains heavier shackle plates, bronze bushings, and wet bolts in addition to the standard components.
  • For starters, there is no metal-to-metal contact between the moving elements, which eliminates the possibility of metal components becoming worn down.
  • Installation and repair of torque-arm axles are made easier by the fact that they are bolted to the trailer frame.
  • Torsion suspension systems are on average somewhat more expensive than leaf-spring arrangements, however this is not always the case.
  • When employed in a tandem or triple-axle system, torsion axles do not provide equalization between the axles due to the fact that they are meant to perform independently of one another.

Inspecting Suspension Systems

RV suspension maintenance does not have a recommended distance or time frame, but all of the components should be visually examined twice a year or every 6,000 miles, whichever comes first. The octagon cam on LCI’s Correct Track suspension alignment system can be set in 14-inch increments to give a smoother ride and minimize early tire wear, according to the company. First and foremost, conduct a thorough inspection of the trailer. Are there any signs that the trailer is leaning to one side or that one tire is higher in the wheel well than the others?

  1. Even while these situations might be caused by the trailer’s contents being unevenly distributed, they could also be indicative of broken or worn suspension components.
  2. Additionally, swaying of the trailer might suggest difficulties with the suspension system.
  3. They should also be checked to see whether they have kept their arch; it is possible for one or more leaf springs to flatten as a result of wear and tear on them.
  4. If the springs have a metal spring clip around two or more leaves, check to see that the clip is still securely fastened to the springs.
  5. Camber is a tiny bend in the axle shaft that causes the center of the axle shaft to be somewhat higher than its outside extremities.
  6. After each use, visually examine the axle tube to ensure it hasn’t sagged due to overheating or hitting a curb or pothole.
  7. Place the center of a straight edge under the center of an axle to aid in the identification of an axle that has been bent.

It is also possible to utilize a string line.

In addition to the hangers, shackle plates, and equalizers, all other components should be visually examined for cracking, bending, cracked welds, and excessive corrosion.

It is particularly important to maintain the condition of spring shackles and equalization mounting holes, as the spring eyebolts rub against them on a regular basis, with the majority of the contact being between steel and steel.

This type of wear may be reduced by lubricating the machine on a regular basis and with care.

A worn bushing may result in metal-on-metal contact between the bolt and the suspension component, which may cause the suspension component to fail sooner than expected.

Inspection of the components necessitates their removal.

After that, the bushing, bolts, and other components may be checked for wear. Examine the bolt holes on the component to see whether they have seen excessive wear or elongation.

Suspension Upgrades

When it comes to RV suspension maintenance, there is no recommended mileage or time frame, but all of the components should be visually examined twice a year or every 6,000 miles. To create a smoother ride and minimize premature tire wear, the octagon cam on LCI’s Correct Track suspension alignment system may be set in 14-inch increments. Initial inspection of the trailer should be performed. Are there any signs that the trailer is leaning to one side or that one tire is higher than the others in the wheel well?

  1. Although these situations might be caused by the contents of the trailer being unevenly distributed, they could also be a sign of broken or worn suspension parts.
  2. It is also possible that the trailer will wobble because of a fault with its suspension system.
  3. They should also be checked to see if its arch has been maintained; it is possible for one or more leaf springs to flatten as a result of wear.
  4. Ensure that the metal spring clip that connects two or more leaves of the springs is still correctly in place if they have one.
  5. As a result, leaf-spring and torsion axles are produced with a tiny bend in them, known as camber, which causes the center of the axle shaft to be slightly higher than the outside ends.
  6. Under the front or back of the trailer, the axle tube should seem to be symmetrical, with both sides of the tube sloping slightly upward toward the centre of the axle tube when viewed from below.
  7. The straight edge’s ends should be in contact with the axle tube, but the middle should have a tiny gap.

A straightening or replacement of the axle will be necessary if the axle is bent upward on one or both sides.

Unless otherwise specified by the manufacturer, all bolts should be retorqued.

Exaggeratedly lengthy holes in the shackle plates or equalization sections, as well as grooves in the spring eyebolts, are not uncommon in this type of application.

It is necessary to examine nylon bushings used in leaf-spring suspensions on a regular basis since they are vulnerable to wear and tear.

In order to ensure proper installation, it is not possible to verify the bushings from the outside of the components.

For this, you must first raise and correctly support the trailer, and then remove the shackle bolts, spring eyebolts, and equalization bolts, among other things.

It will then be possible to check for wear on the bushing, bolts, and other components. Excessive wear and elongation in the bolt holes of the component should be checked.

Axle Alignment

When it comes to tracking straight with a trailer or fifth-wheel, the tires on the trailer or fifth-wheel must be orientated parallel to the trailer’s frame, much like the tires on a vehicle or truck. Axle misalignment can be caused by a variety of factors, including worn or damaged suspension components, a bent axle or spindle, faulty axle installation, and an out-of-balance load. In certain cases, the misalignment may be immediately noticeable. If the toe of a tire is pointing inward (toe-in) or outward (toe-out), or if the tires are too close together on one side of the trailer, this is an indicator that the axles are out of alignment or that they were put incorrectly at the factory.

  • The wheel alignment of the vehicle may also be checked with measurements, but a competent frame and suspension shop can do it with a higher degree of precision.
  • Toe-in or toe-out conditions are indicated by worn tires that have the most severe wear along one edge and progressively less wear along the other side as the tire wears down.
  • It is possible that balancing the weight on each axle will be sufficient to correct axle misalignment.
  • The alignment will be corrected after the balance has been restored.
  • Although it is unlikely, a properly qualified expert may be able to straighten a twisted axle with the use of specialist equipment.
  • A mechanism for aligning trailers and fifth-wheels, developed by LCI, is included on some trailers and fifth-wheels.
  • With the use of a laser alignment tool, precise measurements may be made.
  • Correct Track systems can be purchased aftermarket and fitted on trailers that did not come equipped with the system as original equipment.

Shock Absorbers

Shock absorbers, contrary to their name, do not really absorb shock; rather, they are technically oscillation dampers. The objective of a shock absorber is to dampen the movement of the suspension system. When a trailer strikes a bump, the suspension is compressed and moved toward the trailer’s frame, absorbing the shock that is caused by the road irregularity that has been encountered. In order for the suspension to return to its original position, it must first release its stored energy. Shock mount kits, such as this one from LCI, include all of the gear necessary for installing shock absorbers on a trailer or fifth-wheel.

Gravity then pulls the frame downward, recompressing the suspension as a result of the compression.

The uncontrollable up-and-down cycling of a spring is familiar to anybody who has had a faulty shock absorber in their vehicle.

However, even if trailers are not designed for passenger comfort, a rough-riding trailer is more susceptible to early wear and damage to the contents of the trailer.

Fortunately, numerous manufacturers, including Dexter Axle, LCI, Monroe, and RV Improvement Systems, provide optional shock-absorber kits for their products.

Axle-Reversal Kits

There are two different types of leaf-spring suspension systems available. Overslung suspensions have the axle mounted above the leaf springs, whereas underslung suspensions have the axle mounted under the leaf springs. Underslung suspensions are more common. In addition to making the trailer sit a few inches lower to the ground, underslung suspensions aid to decrease the trailer’s center of gravity when moving, which helps to reduce the effect of wind resistance on the trailer. When going on a roadway, a lower stance may be preferable; nevertheless, there are some scenarios when it is preferable for a trailer to sit higher, such as when traveling off-pavement or when being pulled by a tall vehicle.

For example, an axle-reversal kit, such as Dexter Axle’s Over/Under conversion kit, includes all of the hardware necessary to convert an axle from being mounted over the leaf springs to being mounted under the leaf springs.

Using these kits, the axle may be moved beneath the leaf springs while still keeping its camber angle of 0 degrees.

The installation of enhanced heavy-duty components will pay rewards in the form of lower repair costs and fewer downtime in the future.


• Call Dexter Axle at 260-636-5311 or visit to learn more about their products and services. Joy Rider/RV Improvement Systems | 574-370-4515 | Joy Rider/RV Improvement Systems Lippert Components (LCI) | 574-535-1125 | Lippert Components (LCI) Monroe Shocks and Struts | 734-384-7809 | Monroe Shocks and Struts is located in Monroe, Michigan. MORryde International | 74-293-1581 | MORryde International | 74-293-1581

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