Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Trailer hub includes lug nuts, inner bearing (L68149) and race, outer bearing (L44649) and race, grease cap and grease seal. Fits 3,500-lb axles.
Determining the Bolt Pattern
The first number in the bolt pattern is the number of bolt holes. The second number denotes the diameter, in inches, of the circle on which the bolt holes sit.
On wheels with an even number of bolt holes, measure from the center of one bolt hole to the center of the hole directly across from it. (Example: 8 on 6-1/2 means 8 bolt holes with 6-1/2" from the center of one hole to the center of another on the opposite side.)
To determine the bolt-circle diameter on wheels with an odd number of bolt holes, measure from the center of any bolt hole to the point halfway between the two bolt holes directly across from the first. (Example: 5 on 4-1/2 means 5 bolt holes with 4-1/2" measured to a point halfway between the opposite bolt holes.)
Measuring the distance (D) from the center of one bolt hole on the wheel to the center of a bolt hole right next to it can also help to determine the bolt pattern.
Video of Trailer Hub and Drum Assembly - 3,500-lb Axles - 5 on 4-1/2
Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.
Today we are going to show you how to install brakes on a trailer that does not have existing brakes. It is actually pretty easy to do. It is just very time consuming. There are a couple of things you want to look out for before you start. You want to step behind your trailer, and look behind the existing hub you have. Make sure you have a flange like this on the axle. It is this 4-bolt flange on here; if you have that on your axle you are pretty much home free. This size flange has four bolts. You will see it on 3,500- pound axles like we have here. You also see it on 2,000- pound axles. On a 3,500 -pound one you would probably use a 10- inch drum and on a lighter axle, 2,000 pounds, you probably would use a 7- inch size. Also you notice we have the hub missing. We have to take that off because the hub and drum assembly is all in one piece. It is not like the automotive application. You have to take off the old hub, discard it, and start off fresh.
For this install we are going to install the backing plate. Basically it slides on like so, then it gets bolted onto 4 places. A couple things you might want to take note of is that there is a left and right side to it also an up and down. The magnet always stays pointed toward the ground. And if you did not have a sticker on your brakes that tells you which left and right is, just look for this bow right here. The actuating arm or bow always points to the front of the trailer, so that is a good reference point for you. At this point, let us go ahead and start bolting on our hubs. Works down in a criss cross pattern and make sure you have them evenly tightened. And at this point, you probably want to go ahead and do the same thing for the other side. One thing to note while you are adding the hubs to a trailer - take a look at the spindle. This spindle we have here, for example, we have what is called an EZ Lube spindle. It has a zerk fitting on the end. What happens is grease travels through the middle of the spindle and comes out this hole here. If you have that it is great, but the thing is when you get a new hub you want to make sure what kind of seal it comes with. Most of the hubs will come with a regular single- lip seal. You can see the just one lip right here. It has been around for ages and works great. However if you use this with an EZ Lube Spindle, what happens is grease gets pulled in and applies pressure to this. So what you want to do actually is get what is called a double- lip seal. As you can see here it has a lip on the inside edge here along with the lip on the outside too. Again, this is double protection that keeps grease in and has a little bit extra pressure. You can also tell it is a double- lip seal because you can see a little spring in there. Every double- lip seal out there is going to have that spring in it. So you have an EZ Lube Spindle or double check. Just to be on the safe side, go ahead and order a double- lip seal for your hub. You can see where our hub is sealed right on the edge of the spindle here – I guess you could say it is the bearing or seal surface. This is where you are inside bearing rides right here. [I am going to leave this out for a second.] As you can see here there is the hole where the grease comes out, so it is actually between this seal and this bearing.
When it is all put together this whole area is going to fill up with grease. Of course it cannot come from over top because your race is here. What happens is the grease comes up and fills up here first. Then comes through your rollers and actually into the middle of this cavity here. The whole thing gets packed full of grease. Once that is packed full of grease, the grease will actually travel through the rollers of the outside bearing and then come out through here and out by the nut. Once you have the grease full up to the nut you know that your hub is fully packed and is really ready to go. It is completely waterproof at the same time actually. At this point we can go ahead and slip on our hubs. We have our spindle lightly greased and we have our bearings already packed, and let’s go ahead and put them together. Some spindles like this EZ Lube spindle come with a special tang washer here. If yours has just the plain old regular spindle then you just have a cotter pin going through. In this case we have the EZ Lube spindle so we will go ahead and assemble it. And there will be one extra step involved. Make sure you take out any play. A little bit is fine - just a hair is all you need. Get it to stop then bring it back one notch. Then flip this little edge up into place like so. If you had a regular spindle we would be finished by now but since we have the EZ Lube spindle we will go ahead and use that feature to fully pack the bearings and bring out the grease to both bearings. Installing our hub is complete now. The next step is actually to adjust the brakes. From this point what we need to do is go ahead and adjust our brakes. Basically what we are going to do is just tighten up the drum until it stops turning. Then back off 10 clicks, and then you should have just a very fine light drag. What we do now is go ahead and start running the wires. We are going to follow the factory harness on back to the drivers side wheel. Then we are going to follow the axle on over to the passengers side wheel. Once you are by the axle here go ahead and leave a little loop for working room. Then take the rest of this and then make sure it is tied to your passenger side wheel. We will go ahead and at this point zip- tie the wire to the axle. At this point you have your wire set across the axle the way you want it so lets go ahead and pull the slack up toward the front of the trailer. We will go ahead and make our connections to the wires here. Make sure you note that one wire goes to ground and one wire goes to positive. Again it does not matter the magnet does not care – you just have to make sure that one goes to each one. We will go ahead and split our wire here. To make our connections there are a variety of different ways to do it. There are different types of connectors You can use the quick splice connectors like we are going to use here. You can also use butt connectors also. Basically it is personal preference. For clarity or ease of use we are going to use the quick splices here. At this point you can tape them up or apply sealant to them want. Again, its personal preference how you want to do it. Then once you have those sealed up, then you can just go ahead and zip- tie these to the axle and keep them out of the way so they do not get smashed.
We will do our drivers side now, and what we are going to do is install our ground on this part of the frame here. Actually you can do it everanywhere you want, but we are going to hide it back here and make it a little nicer, and then run our ground wire on up to the front. So we will just go ahead and open up the sheath again. We will then split our wire here and put two ring terminals on there. Now, what we did was we ran our wire and mixed it in with the loom up – that makes it look nice and neat. We are going to put our 7- pole connector on next. First you slide on the cover; then you strip these wires and add ring terminals to them so the connector fits inside. Now well go ahead and add our 7-pole connector here. Now, its tempting to do it color for color because you’ve got the red-yellow-green-brown-blue-black on here and they match up to here, but theres actually two different codes. Say, for instance, sometimes red on here is actually left turn, but on the trailer it is actually yellow, and so forth down the line.. The only common ones you have is white for ground wire and white on the trailer, and blue will be used as our black wire. And the black wire, is actually used on here is actually for the 12- volt power lead. We will start off with the ones that match up and that would be the white. Then well go right next door and do our brake wire. And again, on a trailer it is black on this one but its going to be blue on the 7- pole. Left turn on our trailer is yellow, but the left turn on our 7- pole is actually red. We have green here and that’s our running light and on the trailer it is brown. And then green is right turn on our trailer and that is brown on our 7- pole. Next we just go ahead and slipput our connector back in with the little screw. Then were going to fix our loom and were done. And then tighten the screw. With that our install is complete all we have to do is test it.
Average Customer Rating: 4.7 out of 5 stars (38 Customer Reviews)
by: Mike G.06/26/2013
I got these drums in to replace some old ones. the only thing I miss is the adjustment hole. But being an over cautious tower I inspect my trailer brakes often. Installed yesterday and they worked great. Ordered on a Sunday and received on Tuesday - but I live in the same shipping -zone I believe - got some great LED trailer lights as well. Image shows product installed. 86236
Wow ! Great prices and fast shipping. Saved a ton. I wish I had found you last year when I had to rebuild my othe Pace Shadow GT Trailer after some 150,000 towing miles. This open trailer has had a tougher life and maybe 50,000 miles. We turned around while working on the trailer and there he was. The local turtle thinks he found a new girlfriend !!LOL Gues he likes your drums. 27884
by: Mark S03/18/2011
Simply Exceptional Service! I wanted to make certain I ordered the correct parts to add brakes to a trailer and phoned their sales dept at 7:30 p.m. on a Wednesday evening. I then placed the order online after that. When I arrived home on Thursday the entire order was on my doorstep. And best of all the shipping was free. Great price, great customer service.9675
by: Del H.12/28/2013
The web site it excellent and informative!!! I ordered a complete electric brake system for a new single axle trailer including controller for the truck, which all came in a timely manner and in good condition. BUT, they should have supplied the BASTARD NUTS (7/16"-20) for the two backing plates. I lost a few hours trying to locate the nuts. Also, the bearing caps are so thin that they dent with the slightest hit with a rubber hammer.111407
Good hub/drum assembly. Had a problem after I got them on with my wheel not wanting to fit. Still haven't figured out how a wheel that was on a 5-on-4.5 hub wouldn't fit this hub. The old wheels appeared to be off a car, maybe that was the problem. Just got some new wheels meant for trailers and they fit perfectly. The only other issue I ran into was getting the dust caps on turned out to be a painful process for some reason.88705
by: Jefferson Cannedy04/29/2013
To anyone who is putting brakes on a trailer I got a set of electric brakes hubs bearing and seal and cap from e-trailer and everything fit perfect. They even arrived 2 days earlier than I thought. I would recommend e-trailer over anyone else. They have the best quality product for less and made in USA. For me if I need any trailer parts I wouldn't look any more. They have very friendly service and has someone there that not only works in office but understands and knows bearings and when you ask questions knows exactly what you are talking about. I am completely 100% satisfied with their product and service. Jeff Cannedy78324
by: Ron K.04/16/2013
Good descriptions & product information. Items were and exact replacement fit, in-stock & fast delivery. Got my trailer backup & running in no time for an important run. This will be my 1st choice for future trailer parts.76436
by: Harry D.08/23/2012
With only 10days left before a 1,000mi trip with the family travel trailer, I decided to check one of the brakes for wear. To my great dismay the brakes were heavily worn. On last Friday afternoon, etrailer customer service helped me determine what parts would be needed for my application and for a little over $400, I ordered everything to make completely new again. I received completely assembled electric brakes, new wheel bearings and drums for four wheels. The items were rec'd on the following Wednesday with standard shipping. Wednesday evening I installed all new parts, which all were correct and now I am ready to roll with 6 days to spare. I would strongly recommend etrailer for your trailer needs. 52675
by: Rick B08/04/2012
This was the easiest brake job ever! from start to finish, from jacking up, taking off wheels and old hubs, installing backing plates, new bearings and hubs, and wiring took only 1 hour. They work perfectly! Super fast shipping and great customer service! Thank you!50573
by: Dennis C.03/13/2012
I have not yet installed the new hubs/brakes on my trailer. I did open the box and inspect what was shipped. Everything ordered was there and appear to be of good quality. Shipping was fast and I found etrailer prices to be lower than most other internet dealers. Plus other dealers charge for basic shipping ($30+), making this a very cost effective way to add brakes to my trailer.33768
by: jeff w. Mt. Zion, IL.02/09/2011
Purchased 5 lug 4.5 hub and electric break assembly with controller and wiring. The Web site was easy to follow. Video demonstrations gave me enough information to place an order with confidence I was getting the correct parts. They will be installed on a 24 ft open car trailot. Shipping was fast. I would recommend your company to others. I will write a second review when I install parts and take it for a pull to the drag strip this spring.6895
by: william j mapes12/09/2010
service Service was excellant. Web site was easy to use and very informative. The order was here in exceptional time. Thank you very much.3887
Complete kit exact replacement This drum replaced the worn out one on my '95 Jayco perfectly. Came with everything I needed. One note, the bearings are not pre-packed.2963
by: Robert Marshall04/17/2014
Good description of parts only issue was the 2 external grease caps were crushed and would not go on hub.125795
by: dave s.02/09/2014
Parts fit exactly and work great. Delivery was exceptional. Very good experience with etrailer.116114
by: Bryon F.10/23/2013
The break drum I ordered is a perfect match and fit for the wheel we had problems with.104858
The shipment arrived in one day. Installed the same afternoon with no problems. The only hardware not included was the locknuts for the backing plates. I'm overall pleased with the service.104161
by: Phil J.10/08/2013
Great product at a great price. Super fast shipping. Thanks.103068
by: Chris D09/28/2013
Made in USA. High Quality fast shipping. Have not installed yet.101887
by: al mck04/22/2013
haven't had it or road yet stay tuned. like the fact at least the drum was from usa great price!77286
Hub fit like the original. The brakes did drag on the same location on the hub making me feel the hub was manufactured out of round. Does not come with the nut, washer or cotter pin.72821
Better than factory provided equipment. 68094
by: Tom R.12/17/2012
Amazing shipping time great product 61624
by: Jim H12/14/2012
Worked perfectly, no issues. It was a bonus to have the wheel nuts included in the kit. 61453
by: Colin Smith10/20/2012
comes with everything you will need, bearings are perfect and everything fits perfects 57715
by: Donald S.07/31/2012
Works great very satisfied. 49955
by: Tim L.05/14/2012
Just installed, haven't towed with these yet. Pretty much as described, looks like a nice hub/drum. Nice to have the races pressed in already.40297
My 17 year old hubs were badly damaged from contact with the worn electromagnets. This kit made it very easy to swap out the hubs with all new components.37424
by: Tom B.03/13/2012
Everything was as described! great prod uct33746
by: Jim R03/08/2012
Amazing delivery. I never expected it to get here this fast! Products were packaged very well and in great shape. I will use E-trailer for all my needs. Thanks!33266
by: Jeremy R11/21/2011
I purchased some product on Monday and had it on Wednesday. I had also called with some questions while completing my pepair project and they were VERY HELPFUL with my questions. I would HIGHLY RECOMMEND ETRAILER.COM!!!!!27215
Great Products Here. Arrived in great shape one day before I was promised. Thanks again for all the help !25158
by: Dennis Elswick07/25/2011
fast shipping and good looking product ,,I'll be back20253
it worked great thanks 16415
Very good product; shipped quickly 11573
by: John S.03/20/2011
A perfect fit, all went together fine except that the cap went on with great difficulty. I got them on with some dents.9921
it would be nicer to have the easy lube drum but just clean befor putting it on and it is simple to install 6298
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