How to Choose Replacement 7,000 lb Trailer Axle

Question

Question:

Looking to replace triple axle torsion axle with leaf suspension axle have older Rigid Hitch TA-2750 with 4 inch what axle and suspension could i use to replace that. Thanks

asked by: Fred

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Expert Reply:

I couldn't find any reference to a Rigid Hitch TA-2750, though to choose the correct 7,000 lb trailer axle, you just need a couple measurements. You'll just need to know the dimensions of your current axle's hub face to hub face and spring center to spring center; I have added a help article below which shows you exactly how to measure.

For example, the Trailer Axle Beam with Easy Grease Spindles # e88GR measures 95 inches from hub face to hub face and 80 inches from spring center to spring center.

I've added a link below to our selection of 7k axles for you to check out,

expert reply by: Kyle S

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Answer 1

Brake actuators designed for drum brakes typically produce around 1,000 psi pressure at most, while disc brake actuators will produce closer to the 1,600-psi pressure that you mentioned in your question. I do not recommend using a disc brake actuator…

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Answer 2

I have a solution for you. I went ahead and reached out to my contact at Dexter Axle, and they recommended replacing the surge coupler with a standard weld on or bolt on straight tongue coupler. This is the safest way. They could not confirm for sure…

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Answer 3

All of that is not necessary. All you have to do is lock out the surge coupler so it cannot move in and out or disconnect the brake lines. By removing the old coupler you would have to remove the brake lines any way. A surge coupler can still be used…

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Answer 4

The Kodiak Disc Brake Kit part #K2HR526D is just what you need to add disc brakes on a boat trailer with 5,200 lb - 6,000 lb axles. That said, I would also order four of the the following grease seals as your axle could use either and you won't…

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Answer 5

If you take a look at the provided photo, you can see the pertinent dimensions of the #TRU37FR spindle.

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Answer 6

All of the trailer spindles we sell are weld-on types, including those with brake flanges like TruRyde #TRU74FR that fits 1.75-inch diameter axles. The largest diameter spindle we sell is for a 2-1/4-inch axle beam, part #TRU37FR; this can be seen on…

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Answer 7

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.

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Answer 8

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.…

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Answer 9

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 10

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 11

The manual lockout on your Atwood 85778 surge brake coupler is there so that you can back up the trailer without the brakes locking up on you. Yes you can safely tow your trailer with the broken manual lockout, you just have to make sure you…

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Answer 12

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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