How To Determine Correct Braking Assemblies for Tow Master Trailer with Unknown Axle Capacity

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Question:

I have a tilt-bed equipment trailer possibly manufactured by “TowMaster” guessing. The axle spindle starts at 2.5 inches and shoulders to 2.25”. I cannot find any axle capacity markings anywhere. The inside drum diameter is 12” and the shoe diameter is 2 inches. Need an assembly for the left side but may need the right side as well. Any help would be appreciated. Please let me know if additional information is needed. Thanks

asked by: Brian

1

Helpful Expert Reply:

It is not required to know the axle capacity when selecting the correct replacement barking assemblies for a trailer axle though it does help. If you want to try and determine this you can look for a sticker on the center of the beam or measure the diameter of the beam assuming it is indeed a round axle tube. The smaller 3,500 lb axles usually have a 2-3/8" diameter whereas the larger 5,200 lb and 7,000 lb axles usually have a 3" diameter.

That said, if you know the size of your braking assemblies (measure inside of hub/drum) and your brake mounting flange bolt pattern then you don't really need to know the axle capacity. The dimension you listed of 12" x 2" is very common so I am pretty sure you would also have the five bolt brake mounting flange and in which case the Electric Trailer Brake Kit part # AKEBRK-7-SA or part # AKEBRK-7R-SA for right and part # AKEBRK-7L-SA for left would be correct.

expert reply by: Conner L

1

Answer 1

Hi William; it does make sense and what I can do for you is give you the mounting bolt pattern of the 5-brake flange for the 5.2k to 7k etrailer Electric Trailer Brakes #AKEBRK-7-SA. I have added a diagram below with the measurements showing what…

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Answer 2

The Easy Grease Trailer Hub and Drum Assembly #AKHD-655-6-EZ-K uses a lithium complex, multipurpose grease. You only need to ensure the Grease #L11390 you use is also a lithium complex to prevent any damage which could be caused by using a…

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Answer 3

The Electric Trailer Brake Kit part #AKEBRK-7-SA (part #AKEBRK-7R-SA + part #AKEBRK-7L-SA) will work with pretty much any electric brake controller on the market so there should not be any concern in regards to that aspect. You may however want to…

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Answer 4

Is it possible there's grease in the drum which is causing the brakes to not lock up? If you blew out the inner grease seal or it was leaking at all this is a very likely cause. Otherwise it could be a mechanical problem of the assemblies…

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Answer 5

As you may have already found, 5200 lb, 6000 lb and 7000 lb axles can all use the same components including inner/outer bearings, hubs and brakes. Here are some other things they share in common: Dexter 5200 lb Regular Duty Axle - 0.180 inch tube…

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Answer 6

We carry several replacement trailer brake magnets that are all designed to fit specific models of brake assemblies. If yours don't seem to be close enough to the armature surface of the hub then it would seem that you do not have the correct…

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Answer 7

Yes, we do have the wet equalizer bolts you can use with the Equa-Flex Cushioned Equalizers. You will need #126B2. I have included a picture showing a typical installation of the bolts being used to secure the springs to an equalizer. Installation of…

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Answer 8

EZ Lube axles like the item #T3584F-EZ-8974 come from the factory with just a little bit of grease in the bearings. The first time you use the EZ Lube feature to fill the axle, it will take a lot of grease. You will probably use 3/4 to a full tube…

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Answer 9

It is possible that the MORryde Shocking Absorbing Equalizers #MR27ZR and Wet Bolt Kit #MR46ZR you were looking at will fit your 2020 Grand Design Reflection 337RLS, but the only way to be sure will be measuring what is currently installed on your…

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Answer 10

You can indeed test a trailer's electric drum brakes by directly applying +12V power from a fully-charged battery. You can apply this power to the hot and ground contacts on the trailer's plug (see photo please) or to an individual brake…

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Answer 11

First, a 5,200 pound axle is a de-rated 6,000 pound axle so they take many of the same parts. Some 7,000 pound axles also take the same size parts. The difference is the size or ability of the magnets. Sometimes you will see the same type of magnet…

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Answer 12

An EZ lube spindle will be better because it allows you to insert grease from inside the spindle where the bearings are and push out the old grease whereas with a Bearing Buddy you basically just get to push grease through the front of the hub. I…

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How To Determine Correct Braking Assemblies for Tow Master Trailer with Unknown Axle Capacity

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