Replacement Brakes and Hub and Drum Assemblies that Use L68149 and L44649 Bearings

Question

Question:

I have a 1984 2-horse trailer. I need to replace the brakes and would like the full assembly on both axles. I have removed a drum to check the bearings, the inner bearing is L68149 and the outer is L44649. The AKHD-5475-35-K brake drums indicate they fit these bearing and also list a 3,500-lb axles with #84 spindles. How can I determine if my axles are 3,500-lb axles with #84 spindles to insure I have the correct drums? I am also looking at the AKEBRK-35L-SA Electric Trailer Brake Assembly - Self-Adjusting - 10

asked by: Brent H

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Expert Reply:

The fact that your existing hubs use bearings L68149 and L44649 indicates that the trailer has 84 spindles and the axles are more than likely 3,500 pound axles. The bearing numbers is how we identify things like the correct hubs and capacity so you are good to go.

The bolt pattern the wheels use to secure to the hub and drum assembly is the other key factor. I have included a link that explains how to measure for bolt pattern. The hub you asked about, # AKHD-5475-35-K, has a 5 on 4-3/4 bolt pattern which is not all that common. So determining the bolt pattern is very important.

The most common bolt pattern for hubs that take these bearings is 5 on 4-1/2. Once we have determined the bolt pattern the next step is to determine if you have standard or EZ lube axles. This is easy because if they have a grease fitting at the very end of the spindle (axle) and standard ones do not.

So for example hub # AKHD-545-35-EZ-K has a 5 on 4-1/2 bolt pattern and fits EZ lube axles. The standard counterpart is # AKHD-545-35-K.

The wheel bolt pattern and standard or EZ lube will not apply to the brakes themselves so whatever you end up needing you can use # AKEBRK-35R-SA for the right side and # AKEBRK-35L-SA for the left side.

expert reply by: Michael H

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Answer 1

The Trailer Hub and Drum Assembly - 5 on 5 #AKHD-550-35-EZ-K and the Trailer Hub and Drum Assembly 5 on 4-1/2 #AKHD-545-35-EZ-K only vary in the bolt pattern for the wheels. I've attached an article to help you determine your bolt pattern. The…

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Answer 2

Actually the only difference between EZ lube hubs and non-EZ lube hubs is the grease cap that comes with the hub. What capacity axle do you have and what wheel bolt pattern?

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Answer 3

Traditionally, trailer manufacturers did not use electric brakes on boat trailers because the brake magnet wiring and trailer wiring did not always have the best insulation or water protection. These days, more and more manufacturers are using…

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Answer 4

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are marked…

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Answer 5

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 6

If you still have the trailer manual, I would recommend checking that to see what the manufacturer of your trailer has set as the recommended torque specs for your hubs; a majority of the time, these issues are rooted in over/under tightening of the…

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Answer 7

The magnet should only make contact with the inside of the brake drum when power is applied to the magnet. If it is making contact with the drum all the time, you may have residual power running on the brake wire that is just enough to cause the…

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Answer 8

The HydraStar Electric Over Hydraulic Actuator part #HBA16 has a 12 oz. fluid capacity and the Dexter DX Series Electric Over Hydraulic Brake Actuator part #K71-651 has a 22 oz. fluid capacity. That said, although the extra fluid capacity is nice the…

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Answer 9

Torque specs for wheel lug nuts will vary depending on the diameter of the lugs, type of lug nut and the wheel's material. The linked chart details the recommended torque for many combinations. Dexter Hub/Drum #84546UC3 has 1/2-inch studs and…

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Answer 10

From what I could find, you have a Reliable™ Brand, H-1000 Series hub. This hub uses a SL-172 seal, which cross references to our #58846 seal. This double lip seal will have an inner diameter of 1.719 inches and an outer diameter of 2.565 inches.…

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