Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide

Ask the Experts about this TruRyde Trailer Spindles

• How to Pick Out Replacement Hub for Ski Boat Trailer
  In order to pick out the correct hub assembly for a trailer you are going to need know a few key pieces of information. The first thing you will need to know is the bolt pattern of your hubs. This is so you get a hub that is compatible with your wheels. I attached an FAQ article on determining bolt pattern for you to check out. Next thing you will need to know is what spindle you have on your trailer. In order to do that you can either get the inner and outer bearing numbers from a hub...
  view full answer...
• Replacement Square Spindle for 1994 Trail Rite Trailer
  For your axle the spindle you need the Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide # TRU47FR. This does not have the attached brake flange so you will need to either modify a flange like # 4-35 or salvage the one you have.
  view full answer...
• How to Determine if Trailer has 84 Spindle to Pick Out Replacement
  In order to verify the spindle dimensions so that you can pick out the correct hub/drum you have to get exact dimensions. For that you need to use a digital caliper like part # PTW80157. For how old your trailer is this is especially important as the standard spindles sizes have changed since 1969. An 84 spindle would measure 1.06 where the outer bearing rides, 1.38 where the inner bearing rides, and 1.73 where the seal rides. For a hub with a 6 on 5-1/2 inch bolt pattern that would...
  view full answer...
• 84 Spindle with Brake Mounting Flange Recommendation
  Adding brake mounting flanges to a spindle is something that only a qualified welder with experience welding them on should do. A much easier solution would be to go with a spindle that has a flange mounted to it already like the part # TRU74FR that would fit the same hubs as the # TRU47FR that you referenced. Also, the # TRU47FR is a square spindle and we only offer flanges for round spindles.
  view full answer...
• How to Identify Compatible Hubs for Vintage Utility Trailer
  Thank you for the photo of your vintage utility trailer's spindle. The simplest and surest way to identify a compatible trailer hub is to identify the inner and outer bearings and the grease seal it uses. Matching up those components along with the axle weight rating and the hub bolt pattern is pretty much it. However, in your case I can tell you up front that we have only one hub that uses a bearing whose inner diameter is as small as 0.75-inches, hub # AH15450ECOMP. It uses outer...
  view full answer...
• Trailer Axles to Replace Mobile Home Axles on Car Hauler Trailer
  Mobile home axles are made for transporting such a dwelling only one time, to its permanent location. But they really are not suitable for ongoing use on a trailer. They simply are not made for that particular application, in the same way that passenger vehicle tires are not suitable for use on trailers. For safety reasons I recommend you replace the mobile home axles with actual trailer axles of the appropriate weight capacity for the trailer's GVWR. I linked our main page for beam...
  view full answer...
• Recommended Hub Assembly For 1 Inch Diameter Spindles
  A BTR spindle uses a 1.063" diameter L44649 bearing and a BT8 spindle uses a 0.99" diameter L44643 bearing. In order to find out which you have you will need to pull the hub and either measure the spindle diameter where the inner and outer bearings ride with a digital caliper like # PTW80157 and/or look for the bearing numbers on stamped on the inside of each bearing. For a 1 inch in diameter spindle, I recommend the Trailer Idler Hub Assembly for 2,000-lb Axles - 4 on 4, # AKIHUB-440-2-1K....
  view full answer...
• Spindle Recommendation for Trailer Hub with Bearing Dimensions of 1.25 and 1.75 inch
  The spindle you would need based on the dimensions you provided is what is referred to as a #42 spindle. The part # TRU37FR would fit and has a 5 bolt mounting flange for the brake assemblies. These have a 2,600 lb capacity per spindle. I attached a review video for you to check out as well as a picture that has all of the dimensions of the spindle listed.
  view full answer...
• Where to Measure a Trailer Spindle for Replacement Bearings, Seals, and Hubs
  I have included a picture that shows where you will want to measure the spindle. Measurements need to be as accurate as possible so I recommend using dial or digital calipers to take the measurements. If the other hub is still present you could pull it and get the inner and outer bearing numbers from it.
  view full answer...
• Replacement Hub Assemblies for 2004 Tracker Trailstar Trailer
  If your hub uses the # L44649 bearing (1.063 inch inner diameter) for both the inner and outer bearings, and your Tracker Trailer is equipped with 2,000 pound axles, the correct hub and drum assembly should be the Dexter # 8-257-5UC3-EZ. For an idler assembly you can use part # 8-258-5UC1-EZ. These feature the 5 on 4-1/2 inch bolt pattern that you mentioned as well. I was not able to cross reference the seal number that you provided, so you will just want to make sure that your existing...
  view full answer...
• Where to Measure on Trailer Spindles to Determine Replacement Hubs
  You will need to measure the diameter of the spindles where the seal and bearings ride. Check out the picture I attached that shows where this is. You will need an exact measurement so either a digital or dial caliper will be needed. To pick out the correct hubs you will also need to determine the bolt pattern of the hubs you currently have so that the new ones will be compatible with your current hubs. I attached an FAQ on how to determine this. If you get back to me with that information...
  view full answer...
• How to Pick Out Replacement Hubs for a Boat Trailer
  In order to pick out the correct hub assembly for a trailer you are going to need know a few key pieces of information. The first thing you will need to know is the bolt pattern of your hubs. Since the figure you came up with doesn't match any of the 5-bolt bolt patterns I am going to need to to recheck your bolt pattern. For further info on this check out the FAQ article I attached on this. Next thing you will need to know is what spindle you have on your trailer. In order to do that...
  view full answer...
• Tips for Determining Square Trailer Axle Capacity
  Square axles can be tough to determine capacity. Often times the same spindle fits a range of axle capacities. The best way to determine the capacity is to get the inner and outer bearing numbers stamped into the metal of the bearings like you did. The numbers you listed do not match any of the spindles we carry though so I was not able to determine anything from that. The bolt pattern of the hubs on the trailer is typically used on 2k-3.5k axles, most 15 inch wheel trailer setups have...
  view full answer...
• How to Determine Hub and Spindle Size
  The spindle dimensions are as follows: A is the mounting dimension, B is the seal dimension, C is the inner bearing surface, D is the outer bearing surface and E is the diameter of the threaded portion of the spindle for spindle nut selection. Say you need a spindle and hub for a wheel with 5 on 4-1/2 inch bolt pattern and an axle that is 3500 lbs. For a single axle trailer you can use two of either the item # TRU64FR, if your axle is round or item # TRU47FR if your axle is square....
  view full answer...
• Old Trailer has 2 Different Sized Spindles and Obsolete Bearing and Seal Numbers
  That looks like a mobile home axle. It is possible that both axles are mobile home axles. But the problem with that is they are meant for one time use only. People get them because after they are used they are cheap. It is possible that this is also why the axles have two different sets of bearings. It is also extremely difficult to find parts for mobile home axles. The 2788 and 1779 bearings are associated with hub 22834 which is not available. The seal sounds like a # 29031 which has...
  view full answer...
• Can 15 inch Trailer Wheels be Replaced with 14 inch Trailer Wheels
  To go from a 15 inch trailer wheel to a 14 inch trailer wheel would only require you to match up the bolt pattern of what you currently have with what you would like to install. You will first need to determine what bolt pattern you have on your wheel. I attached a link to a help article that details how to do this. In the 14 inch trailer wheel size we have only the 5 on 4-1/2 inch bolt pattern. This is a very common bolt pattern though. You have the choice of a 215/75-14 like...
  view full answer...
• How to Determine Capacity of Square Axle
  Square axle capacities are pretty hard to determine. Unlike round axles, they do not have set capacities based on their dimensions. Based on the bearings your hub looks like it's rated for 3,500 lbs. Most likely that would be the same rating as your axles.
  view full answer...
• How to Tell if a Trailer Spindle is Damaged or Needs to be Replaced
  If you remove the hub and wipe away the grease on the spindle you can check to see if it is damaged. Look for an scarring, gouges, discoloration, or scoring on the spindle. If the spindle is damaged then the bearings won't ride properly and can fail again or it can cause other problems such as uneven or excessive tire wear and ride quality problems. If the spindle is damaged then you can't really repair it and the whole axle should be replaced. I doubt that this is the case based on...
  view full answer...
• How to Pick Out Replacement Hub for a Trailer with Rusty Hub
  Your question came in blank, but it looks like you are looking for replacement hubs based on the pictures you submitted. In order to pick out the correct hub assembly for a trailer you are going to need know a few key pieces of information. The first thing you will need to know is the bolt pattern of your hubs. This is so you get a hub that is compatible with your wheels. I attached an FAQ article on determining bolt pattern for you to check out. Next thing you will need to know is...
  view full answer...
• Removing and Replacing Trailer Spindles
  To replace a spindle, the old one would need to be cut off, and the new one welded into place. This is NOT a job for the do-it-yourselfer. The new spindle must be absolutely square with the axle in order to prevent premature tire wear and wheel tracking problems. I would recommend finding a welder who is experienced with trailer axles. Your local RV dealer or repair facility could probably refer you. In many cases, it's less expensive to simply replace the trailer axle itself. We offer...
  view full answer...
• Looking for Grease Seal Bushing
  The surface of the # TRU47FR where the grease seal rides is an integral part of the spindle, not a bushing. We do offer some Bearing Buddy grease seals like # BB60002 that provide a bushing like the one you speak of, but nothing that would work with the specific # TRU47FR spindle you referenced. If you use a different spindle, I would be happy to recommend the proper Bearing Buddy grease seal for you, if one is available. If you would care to provide me with the inner and outer bearing...
  view full answer...
• How to Accurately Measure Spindle Dimensions
  The range of trailer spindles we offer is shown on the linked page. These include both round and square stub types rated for axles ranging from 2,000 lbs to 7,000 lbs. On the chart you can see the key dimensions for five points on the spindle, including where the grease seal rides (B) and where the bearings ride (C and D). Spindle dimensions must be taken with precision, to the nearest few thousandths of an inch; fractional dimensions are not accurate enough so you will want to use a...
  view full answer...
• Recommended Spindle And Hub Assemblies For 1-1/2 Inch Square 2,000-Lb Axle
  The spindle that you referenced, part # TRU47FR, will work great for you. This spindle features a 4 inch long stub, and is rated for a 3,500-lb axle. I have attached a link to a product review video for this spindle you can check out. The installation of this spindle should be done by a qualified professional welder because it is important that the spindle is welded in place as square and concentric as possible. The hub assembly designed to work well with the TRU47FR spindle is part...
  view full answer...

Do you have a question about this Trailer Spindle?