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What about using a truck rearend for....

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Nathan(GA)

08-14-2000 19:38:09

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a trailer axle. I have two 3/4 ton truck rears and was wondering about using them for an equipment trailer. Would it be worth the trouble? What would the rated capacity be? Some mighty big bearings and subs on these rascals. Maybe use a surge brake hitch to use the axle brakes. Any thoughts, good or bad?

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rodney johnson

08-14-2000 20:24:04

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Re: What about using a truck rearend for.... in reply to Nathan(GA), 08-14-2000 19:38:09

if thier full floating rear ends, for equipment trailer sure take the load and the heat as well surge brakes is great idea, seen a few people being pushed down the road by what they were pulling, depends on the vechile your using and its requirments.

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Burrhead

08-14-2000 22:26:34

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Re: Re: What about using a truck rearend for.... in reply to rodney johnson, 08-14-2000 20:24:04

Nathan the axles will do fine, but I would'nt use surge brakes.

I thought surge was the way to go til I bought a new trailer with them on it.

They don't do that good if you need trailer brakes going forwards, and everytime you start to back up with a load they will lock you down.

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Nathan(GA)

08-18-2000 07:31:24

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Re: Re: Re: What about using a truck rearend for.... in reply to Burrhead, 08-14-2000 22:26:34

Burrhead, We had a trailer where I used to work that had that problem. I never pulled it , but did move it around the yard one time and know what you mean. It did have a lockout feature for this, but who wants to get out and lock it every time they want to back up?

What other means are there for using hydraulic brakes without vacuum? And what do you think the capacity would be on those 3/4 ton axles?

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BFO

08-19-2000 17:19:13

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Re: Re: Re: Re: What about using a truck rearend for.... in reply to Nathan(GA), 08-18-2000 07:31:24

Nathan, Carlisle makes an electric over hydraulic system. I haven't tried it myself yet, but I think it's worth looking at. I'm trying to schedule some shop time for a trailer of my own this year, and that's what I'd like to try. If I ever get it done, I'll post the performance, but would like to hear from anyone who already has this system.
As for the truck axle, just check the gvwr, the axles will be broken down to their max. weights. I've made a few pup trailers from stake trucks with juice brakes, and they work fine.

electric/hydraulic braking

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Nathan(GA)

08-19-2000 20:57:49

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Re: Re: Re: Re: Re: What about using a truck rearend for.... in reply to BFO, 08-19-2000 17:19:13

Thanks BFO, I think the mfg under rate the axles for truck use. I don't remember exactly what the rating is right now. I know comparing the stubs and bearings as well as the housing, the 3/4 ton are much larger. I would much rather have a couple of 8000 lb commercial axles, but they are expensive and these are just laying here. Let me know what you come up with.

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Burrhead

08-21-2000 20:16:42

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Re: Re: Re: Re: Re: Re: What about using a truck rearend for.... in reply to Nathan(GA), 08-19-2000 20:57:49

Nathan all I can see on this F250 is not to exceed 7000 on the rearend regardless of tire applications. I would think that is Ford's way of rating this axle at 7000.

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Neil

08-22-2000 06:28:11

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Re: Re: Re: Re: Re: Re: Re: What about using a truck rearend for.... in reply to Burrhead, 08-21-2000 20:16:42

Wouldn't that make the axle rated at 7000 + the weight of the rear of the F250 + the stress added by being the drive axle?

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Burrhead

08-22-2000 10:24:31

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Re: Re: Re: Re: Re: Re: Re: Re: What about using a truck rearend for.... in reply to Neil, 08-22-2000 06:28:11

As much mumbo jumbo as they put on mine I can't tell much about it.{:^)

I did call over to my son's and got him to look on his data tags.

His F250 has a separate data plate for the front and rear axles.

The front is 4400 gross weigth and his rear axle is 7400 gross weight.

If you add up the axle ratings and subtract the vehicle tare wt then it's rated to haul 6300 lbs of cargo. Not too bad for 3/4 ton truck I guess.

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BFO

08-23-2000 07:15:16

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Re: Re: Re: Re: Re: Re: Re: Re: Re: What about using a truck rearend for.... in reply to Burrhead, 08-22-2000 10:24:31

Just checked my Rock, and it's 3800 on front, and 6000 on the rear.

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Burrhead

08-23-2000 13:52:33

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Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: What about using a truck rearend for.... in reply to BFO, 08-23-2000 07:15:16

Now BFO you know the rules. If it aint at doing at least as much or possibly more than a dorf you can't post it.

Dem "Chibbie" forum cops will cite you for misrepresentation.

Be nice to them when they haul you in and as quick as I dump my onion rings and sweep up the winder area, I'll come get you out if my relief shows up on time.

She may be late today. I think she just borried a dorge diesel.

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BFO

08-24-2000 04:17:52

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Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: Re: What about using a truck rearend for.... in reply to Burrhead, 08-23-2000 13:52:33

OOP'S! Your right, boy is my face red. ;-)

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rodney johnson

08-15-2000 17:55:55

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Re: Re: Re: What about using a truck rearend for.... in reply to Burrhead, 08-14-2000 22:26:34

is this a common problem with surge brakes and has the manufactor of this equipment coming out solutions to address this problem, is this system using the hydraulic's or electric brakes also if the axel or brake shoes reversed would have these silmular characteristics?

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BFO

08-19-2000 18:02:52

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Re: Re: Re: Re: What about using a truck rearend for.... in reply to rodney johnson, 08-15-2000 17:55:55

That's not the only problem with surge brakes. If you start digging into government regs, as they pertain to vehicle brakes, you'll find that the terms "stop" and "hold". While under ideal conditions (staight line, and dry), you might be able to "stop" a surge brake trailer, without an independant cab controller, you will never "hold". Now let's get back to "stopping", what happens if the road is slick and you want to slow down going around a corner with a surge brake trailer. The brakes need a reaction from the tow vehicle to apply. In the meantime, while your waiting for the surge coupler to react, the trailer pushes the rear of the tow vehicle off the road, cancelling the brakes, and there you are waiting for CAA. Now if you would have had a cab control, the trailer brakes could have been applied first, straightening out the truck'trailer.

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Burrhead

08-15-2000 19:44:50

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Re: Re: Re: Re: What about using a truck rearend for.... in reply to rodney johnson, 08-15-2000 17:55:55

It's a common problem on all the surge brake systems. The only trailer brakes that work like they should are connected straight into the truck hydraulic brakes or are electric controlled.

It's one of those things that look real good on the drawing board but you can't haul with the drawing boards.

The trailer brakes will apply late and then hold back til you get enough forwards pull on the tongue to release them.

Then when you have to back up with the surge brakes, the brakes will think you're trying to stop and automatically apply themselves.

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