If you're planning to replace the 3500 lb axle hub , you've probably realized just exactly how common these items are on utility and boat trailers. They may be fairly much the business standard for something that isn't the massive car hauler or a tiny garden cart. It's ideal middle terrain where one can haul the decent amount associated with weight—think a few of ATVs, the small tractor, or perhaps a decent-sized fishing boat—without needing a heavy-duty commercial setup.
But despite the fact that they're everywhere, coping with them can become a slight headache in the event that you don't understand what to appear for. Whether you're staring at a rusted-out mess after a season of salt-water boat launching or even you're just using preventative maintenance prior to a long road trip, understanding how these hubs work may save you the lot of grease-covered frustration.
The reason why the 3500 lb Rating Matters
When we speak about a 3500 lb axle hub , we're usually talking about one fifty percent of a pair. The standard single axle rated for 3, 500 pounds uses two of the hubs, each carrying fifty percent the load. It's a sweet location for DIYers because the particular parts are inexpensive and simple to discover at nearly every farm or auto supply store.
The reason this unique rating is therefore popular is flexibility. You'll find these hubs on everything from landscaping trailers to pop-up travelers. They're created to be tough, however they aren't invincible. The most common stage of failure isn't usually the steel of the hub itself, but the particular bearings tucked inside. If those go, the whole hub may warm up, weld alone to the spindle, or even worse, send your wheel bouncing down the highway with out you.
Identifying Your Hub plus Bolt Pattern
Before you run out and buy a new 3500 lb axle hub , an individual need to create sure you're getting the right one. Most of these use the "5 on 4. 5" bolt design. If you aren't sure what this means, it's just a way of saying there are five lugs, in addition to if you measured from the center of one guy towards the back of the third one, it would be 4. 5 ins.
It's the most typical pattern away there, but don't just assume. I've seen guys get home with the brand-new hub only to find out there their wheels have a different spacing. Have a second to determine. It saves a visit back to the particular store, as well as your bloodstream pressure will thank you.
Another thing to check on is the inner plus outer bearing sizes. On a standard 3, 500 lb axle, you're almost always looking at an inner bearing (L68149) and an external bearing (L44649). They will aren't exactly the same dimension, which is a mistake people make once and in no way again. The inner one is slightly larger because it takes more associated with the load.
Idler Hubs vs. Braking Hubs
You'll usually run into two sorts of setups: idler hubs and hubs designed for brakes. An idler hub will be as simple since it gets. It's just an amount of machined metal that holds the particular bearings and the wheel. It doesn't do anything additional than spin. They are common on lighter trailers or the particular rear axle of a dual-axle set up where only one axle has brakes.
On the additional hand, if your truck has electric or even hydraulic brakes, your current 3500 lb axle hub may be part associated with a drum assembly. These are heavier plus a bit more expensive, but they're essential for safety when you're hauling anything heavy. If you're upgrading, you can't just swap an idler for a brake drum with no also installing the particular backing plates plus the actual brake pedal shoes. It's a larger job, but when you've ever experienced a trailer pressing your truck straight down a steep mountain, you know it's well worth the effort.
The particular Importance of the particular Grease Seal
One of the most overlooked areas of the whole set up is the grease seal off on the back of the hub. This little rubber plus metal ring is definitely the only factor keeping your lubricant in and the road grime out. If you're changing your 3500 lb axle hub , make sure you, don't reuse the old seal. They're cheap—usually just a few bucks—and they typically get damaged when you draw the hub away from anyway.
Regarding boat trailer owners, this is even more critical. If that seal fails so you back your trailer into the drinking water, the cold water makes a vacuum that will sucks moisture perfect into the cozy hub. That's the recipe for corrosion and bearing failing. Look for "double lip" seals in the event that you're doing a boat trailer; these people provide an additional coating of protection against water intrusion.
Maintenance: Keeping Points Moving
In case you want in order to avoid buying a new 3500 lb axle hub every single few years, you've got to get comfortable with grease. It's a messy work, but it's the lifeblood of your trailer. Most contemporary hubs come with a good "EZ Lube" function, which is a grease zerk on the end of the particular spindle.
While they are great, don't just pump grease in there blindly. If you over-pressurize it, you may actually blow out the rear seal, which ends up finish your brakes within grease. If you have brakes, that's a nightmare because they won't work any more. The best method to grease all of them is to jack up the trailers and spin the particular wheel slowly while you pump. This can help the grease spread evenly around the particular bearings.
A fast tip: Always use a high-quality, heat resistant wheel bearing grease. Don't just get whatever is within the particular grease gun within the back associated with the shed. Truck bearings spin from much higher RPMs than car bearings because the tires are smaller, therefore they generate a lot of warmth.
How to Tell in case your Hub is Failing
You don't need to find away your 3500 lb axle hub is shot when you're 50 mls into a 200-mile journey. There are usually the few indicators. The particular easiest one in order to check is temperature. When you stop with regard to gas, walk around and carefully touch the center associated with your trailer wheels. They should be warm, but never hot. In the event that you are hot plenty of to burn your own finger, you've got a bearing or a brake hauling.
Another indication is the "death squeal. " If you hear a high-pitched chirping or grinding sound coming through the trailer, pull over immediately. That's the sound associated with metal on metallic, and it means your bearings have given up the ghost. If you catch it early, you might just need brand-new bearings. If you wait, you'll end up being replacing the entire 3500 lb axle hub and possibly the particular spindle too.
Replacing the Hub: A Quick Explanation
Swapping out there a 3500 lb axle hub isn't rocket science, but it will need a bit associated with elbow grease. You'll need a jack port, some jack appears (never trust just the jack! ), the lug wrench, and a few pliers for the particular cotter pin.
- Loosen the particular lugs as the wheel is still on the floor.
- Jack it up and secure it on stands.
- Pop the particular dust cap off. A flathead screwdriver along with a hammer usually do the trick.
- Take away the cotter pin as well as the castle nut. This is usually what holds the hub on the spindle.
- Slip the hub away from. End up being careful, as the outer bearing may drop out and get within the dirt.
- Clean the particular spindle. Utilize a rag in order to get all the aged, nasty grease away from so you may inspect the metal for any scoring or heat damage.
- Pack your new bearings. Don't simply smear grease on the outside; you have to power it into the rollers until it squishes out the particular other side.
- Slide the new hub upon , tighten the particular castle nut, and back it away just a locks so the wheel moves freely but doesn't wobble.
Wrapping It Up
With the end of the day, the particular 3500 lb axle hub is really a simple component, but it's doing a wide range of heavy lifting. Taking care of it isn't very hard, it's just one particular of those tasks that's easy to neglect until something will go wrong. Some oil and a quick inspection every time of year can keep you from being the particular person stranded upon the shoulder from the highway.
It's one of those things where "good enough" generally isn't. Buy high quality parts, don't skimp on the fat, and keep an eye on all those seals. Your trailer—and everyone else within the road—will be a lot safer for it. Plus, there's a certain fulfillment in knowing your own gear is in top shape before a person head out upon your next adventure.