Re-Surfacing Specification for Hub/Drum Assembly on 3500-lb Axle

Question

Question:

can these hubs braking surfaces be milled down slightly to smooth up the surface? I am in the process of overhauling the brakes and wiring system on a 3500 lb dual axle cattle trailer. we are installing new brake assemblies and one new hub. the braking surface on the three old hubs have some grooving of approximatley 1/32 to1/64 inch. if so what are the milling spec tolerances? we received our order yesterday. thank you for the fast delivery.

asked by: Aaron P

1

Helpful Expert Reply:

First, thank you for your recent order from etrailer.

Most hub/drum assemblies, including the Dexter # 84656UC3 that you purchased, will indicate their maximum re-bore dimension right on the hub outer surface. Please refer to the photo I have linked for you.

expert reply by: Adam R

1

click to enlarge

Answer 1

The part of a hub/drum assembly that makes contact with the electromagnet, the armature surface, cannot be machined. If the surface is deteriorated you'd do well to replace that hub. The link provided will show you all hub/drum assemblies which…

view full answer...

Answer 2

I went out to the warehouse and pulled trailer hub and drum assembly #84556UC3-EZ to measure the outer diameter of the hub bore. I used digital calipers to take the measurement and came up with 2.659 inches in diameter.

view full answer...

Answer 3

I went out to the warehouse and checked our stock of hub and drum #84656uc3. All of the units are just as you have described and the races are installed correctly. If you are looking at the inner race from the back side of the hub and drum, there…

view full answer...

Answer 4

The Dexter Trailer Hub and Drum Assembly #84556UC3-EZ referenced in your answer is a 5 on 5 inch assembly that is designed for most 3,500 pound axles. The drum dimensions are 10 inch diameter x 2-1/4 inches wide. This will slide over the axle spindle…

view full answer...

Answer 5

You do have self adjusting brake assemblies on your trailer currently that are 10 inch in diameter and for a 3,500 lb axle so what you'd want is the etrailer brake set part #AKEBRK-35-SA. This is correct size you need and also self-adjusting like…

view full answer...

Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

view full answer...

Answer 7

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…

view full answer...

Answer 8

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…

view full answer...

Answer 9

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

view full answer...

Answer 10

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

view full answer...

Answer 11

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…

view full answer...

Answer 12

Hey Richard, thanks for reaching out! The Dexter DX7.5 Drop-N-Go Brake Actuator #099-175-00 is a great option for a replacement actuator because it's a direct replacement for the common Model 60 actuators that were popular in the '90s.…

view full answer...

Re-Surfacing Specification for Hub/Drum Assembly on 3500-lb Axle

Product Page this Question was Asked From

Continue Researching