Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 4-1/2" Center

Ask the Experts about this etrailer Trailer Leaf Spring Suspension

• Why Are Shackle Straps Hitting Frame When Re-Building Trailer Suspension
  The problem seems to be mostly that your shackle straps are hitting the frame, and the reason for this is almost certainly because the 3-1/8" Shackle Strap # TRSL313 you are using are too long. The other possibility was the hangers being too short but that is unlikely considering the lengths you gave. What I recommend is trying out the 2-5/8" shackle straps from the the # APT8 kit you have, as those are the typical length for a tandem axle trailer, while 2-1/4" straps such as # TRSL225...
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• Hanger Placement on the Tandem HAnger Kit part # APT8
  There is no definitive guide to the installation of the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs part # APT8. It is designed as a universal tandem axle trailer hanger kit. It can be used in many different situations. Basics are the hangers get welded to the trailer where you will require them for you application and everything attaches to them. It depends on the leaf springs you are using. Basically you will need to mock it all up before permanently installing anything on...
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• How to Determine Hanger Spacing on a Tandem Axle Trailer
  It depends on the leaf springs you are using. Basically you will need to mock it all up before permanently installing anything on the trailer. Generally speaking the distance between hangers would likely be 24-3/4 inches on center to 29-1/2 inches on center but again it depends on the springs being used. These are just rough guide lines and really the only way to get the right spacing for a given trailer is to mock everything up and adjust as needed. Also, even though you asked about...
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• Tandem Axle Hanger Kit With 7-Inch Equalizers and 4-1/2-Inch Hangers
  We offer a Tandem-Axle Trailer Hanger Kit for Double-Eye Springs from Redline, part # APT8, that includes 7-3/4-Inch long curved equalizers and both 4-1/2-inch and 2-1/2-inch tall hangers. The shackle straps in this kit are 2-5/8-inch long measured from hole center to hole center, but we do offer longer shackle straps as separate components. For example, part # TRSL350 is a 3-1/2-inch strap (measured eye to eye) and 4-3/4-inches overall. I have included a link to our main page for trailer...
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• Recommended Spring Hanger Kit for Load Rite Boat Trailer 3X5 Box Frame, 7200 lbs Gross Suspension
  There are a lot of variables to consider when selecting a hanger kit. First you should select a kit that will accommodate the wheel and tire combination you are using. The # APT3 kit is a good choice for smaller wheel and tire combinations like 14 inch wheel and tire combinations and the # APT5 kit would be a good choice for 15 or 16 inch wheel and tire combinations since it provides a bit more clearance for tire height. The # APT7, # APT8 and # APT9 hanger kits are typically used as...
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• Dimensions of Center Hanger in Redline Tandem-Axle Trailer Hanger Kit for Double-Eye Springs APT8
  The spring hangers included in Redline kit # APT8 are intended for weld-on installation. Hanger part # E4139 that is included in the kit does have two holes that are for attachment of your springs. This part of the hanger will not be welded. I pulled one of these from our warehouse to measure its height and found the actual height to be 4-3/4-inches measured tip to tip; width is 3-inches. From the center of the 9/16-inch hole to the top edge of the hanger measures the specified 4-1/4-inches....
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• Solution for Slowing Corrosion Development on Trailer Suspension Comonents
  This may seem silly but if you spray a lubricant like WD40 on the metal surfaces after cleaning them the oil will inhibit the ability of the water to contact the metal. Similar to how keeping a bike chain lubricated allows it to prevent rust development. But if you are dipping the trailer in salt water rust is basically inevitable.
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• Troubleshooting Trailer Shackles that Reverse on a Trailer Over Bumps
  The equalizer on your trailer suspension needs to be able to move, you might have leaf springs that are too short or your spring hangers are too far apart. Typically when people have this problem the solution is to have the spring hangers brought in closer together.
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• How Tight Should Trailer Suspension Shackle Bolts Be Tightened
  We recommend that shackle bolts be tightened fully, then backed off slightly to allow free movement. For the distance between the center of the axles 30 inches is the recommended distance to use with a 26 inch long leaf spring similar to the # SP-212275. Especially if the shackle angles look good.
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• Troubleshooting Trailer Equalizer that Tilts to One Side
  Normally if the equalizer is tilted like what you have typically it's because the trailer is not sitting level. The side tilted up is typically pointed down towards the ground. It's hard to see in your picuture but it almost could be the case based on the angle of the frame and the ground in the background. Otherwise it indicates that either a leaf spring is too long or the center hanger is not properly located. I'd try measuring the distance between all of the hangers on one side of...
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• Leaf Spring Bushings For Tandem-Axle Hanger Kit # APT8
  Our Tandem-Axle Hanger Kit, # APT8, comes with the bushings already pressed into the equalizers, but it does not include the bushings for the leaf springs. If you need bushings for your leaf springs, you will want to pickup up 8 of part # TRBU11566 for standard nylon bushings or we offer Lippert's Never Fail Bushing Set, # LC279684. This set includes 8 bushings, so you will only need to purchase a quantity of 1. The Never Fail bushings cost more, but they will perform much better...
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• Availability of Replacement Trailer Suspension Parts in Kit Form
  The Redline Tandem-Axle Trailer Hanger Kit you referenced, part # APT8, does include the hangers as you noted. All of our kits include the hangers. If you do not want them you can order the other components as individual items. The linked page will show you all trailer suspension component parts like equalizers, bushings, shackle links, bolts, etc. and you can select only the items you need. You can use 2 of # TREQE1, 8 of # 115052 and 14 of # 166081.
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• Trailer Suspension Hanger Kit that Uses 356 Equalizer or the Individual Parts to Make a Kit
  No, none of the suspension hanger kits we have use equalizer # TREQ356. You would have to get the parts individually or get a kit with the proper sized hangers and shackle straps and just add additional equalizers. For a 2-9/16 inch hole center to center shackle strap we have # TRSL256. For bolts you can use # 126B2 for a wet bolt and nut or # 166081 for a regular bolt with nut. For the hangers though there are lots of options and I don't know exactly what you need so I have included...
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• How to Find the Correct Replacement Equalizer
  The Tandem-Axle Trailer Hanger Kit for Double Eye Springs # APT5 may have the correct equalizer but you will need to measure the current equalizer to find out. The length from the center of the left-most eye to the center of the right-most eye of your equalizer needs to be the same as the 7-3/4 inch measurement in this kit. Since you said the shackles are hitting the frame I recommend using a kit with a center hanger that is longer than the 3-3/4 inch hanger that comes with Kit # APT5....
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• Installation of Hanger Brackets and Springs for Tandem Trailer Axles
  It is not uncommon for the trailer hangers on a tandem axle trailer to be all the same size or for there to be different sizes that can be 1-1/2 to 2 inches different in height when you compare the center hanger to the front and rear. For example, the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 4-1/2" Center # APT8 has that 2 inch difference in size. I've attached an article on suspension to help further as well. You will want to make sure you position...
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• Why is Center Hanger Longer for Tandem Axle Trailer Hanger Kit
  The center hangers in the Tandem-Axle Trailer Hanger Kit # APT8 that you recently purchased are indeed longer. This is actually pretty common for tandem axle trailers. The reason for the extra length on the middle hanger is related to the shackle straps of the equalizer. You want this hanger to be a bit longer to compensate for how the shackle straps move the spring higher up. I have attached an image to better clarify this. It is possible for the shackle to flip like you described,...
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• How to Determine Hanger Spacing on Tandem Axle Trailer
  That depends on the width of the equalizer used in the suspension setup. Let's say you were using the tandem hanger kit part # APT8 though which has a 7-1/2 inch wide equalizer though. The distance between the hangers would be 28 inches using the # SP-216275 which measures overall 23-3/8 inches. Basically with this spring you want to have 24-1/4 inches between the hangers on the outside of the setup and the bolt hole center of the equalizer side it attaches to using shackles. So roughly...
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• What Are the Correct Replacement Leaf Springs for 6,000 lb Axle
  There are leaf springs available with measurements close to 25" from center of spring eye to center of spring eye, though the correct one is going to depend on your axle capacity, which should be stamped onto the axle itself. Knowing this information is going to be important to get you the correctly rated springs. The options for you are going to be 6-Leaf Double-Eye Spring # SP-222275 which is for 5,300 lb axles and is 24-7/8" from center of spring eye to center of spring eye. Please...
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• Hanger Kit Recommendation for a 6K Axle on a Tandem Trailer
  There are two spring options that would work for you, the part # SP-115275 that you referenced or the 5 Leaf Spring part # SP-111275. The only difference is that the # SP-111275 is a multi-leaf spring with a 100 lbs more capacity than the # SP-115275. Either would work fine for you, I would go with the # SP-111275 just because of the additional capacity, and with a multi-leaf spring if a leaf fails your trailer wouldn't be completely un-usable. You would be able to limp home to fix the...
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• How to Decide Which Tandem Axle Trailer Hanger Kit to Use
  Typically when building a tandem axle trailer I recommend using either the # APT3 or # APT5 Tandem-Axle Trailer Hanger Kit. These are the most common kits used for utility trailers and parts are readily available. The # APT5 kit is by far the most common because all the hangers are the same height and provide good tire clearance. There are a lot of variables when selecting a hanger kit. First you should select a kit that will accommodate the wheel and tire combination you are using....
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• Does Trailer Suspension 7-3/4 Inch Equalizer EQ-E1 Have a Weight Capacity
  Equalizer # TREQE1 does not have a weight capacity itself. It isn't bearing much of the weight compared to other components in a trailer suspension set up. If you have a tandem axle trailer then you could potentially use kit # APT5, # APT3, # APT9, # APT8, # APT7, or # APT3HD. All of these kits have the 7-3/4 inch long equalizers. For a triple axle trailer you could use # APTT5 or # APTT3. All of the above kits also come with hangers. If you do not need hangers then you would...
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