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Tractor Talk Discussion Forum

OT- Determining Axle Capacity

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Can't even use

11-02-2004 04:44:34




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Just got ourselves a nice '83 Brigadier. Found a nice 20' grain bed and hoist for it too. Now, the problem is how much the chassis will handle. Bed will hold close to 700 bushel, about 40K, of corn. However, the GVW on the off the tag on the truck says Front Axle is 12K and rears are 34K, 46K total. Truck empty weighs 19K. So clearly loaded full I would be way over GVW. Now, the thing is that the front tandem has a working odometer on it and it reads different than the truck odometer, thinkin maybe someone put different axles under it. So finally to the question, is there some way of determining axle capacity... measuring, ID tag on axle, other way? Is it possible that just the springs are rated for only 34K and have heavier axles? And just how much can you go over rated capacity and be safe? Sorry for rambling on, had a lot of Mt. Dew during league bowling last night!

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Leland

11-02-2004 18:55:29




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 Re: OT- Determining Axle Capacity in reply to Can't even use my name, 11-02-2004 04:44:34  
Add a tag axle and put an 18000 lb front axle with 18 ply super singles and you will have a heavy hauler and not have any worries . all though I have drove many trucks with 12 34 34 axles and ran with 90-95000 on a regular basis and never had any problems other than dodging scales.



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Can't even use my name

11-03-2004 04:42:51




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 Re: OT- Determining Axle Capacity in reply to Leland , 11-02-2004 18:55:29  
I guess I may be a bit confused. This is a tandem axle straight truck to let everyone know. Front axle is 12K and the tag says rear, not rears, is 34K with a GVW of 46K. You say rears were 34K and 34K so does that mean your total was actually 80K? I am not really worried about the law. This thing will hold around 700 bushel and would like to load it full from the field. Now when hauling to the elevator the law comes into effect a little bit, around here they usually just check lights, tires, sticker, and fuel. I just don't want to put 60K on a truck that can only handle 46K. So, can these axles hold that kinda weight but are just claimed to be lighter on the tag for the law? Are ya confused yet too? HA HA! Thanks fellas

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Leland

11-03-2004 16:11:12




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 Re: OT- Determining Axle Capacity in reply to Can't even use my name, 11-03-2004 04:42:51  
Sorry I was talking about semis,No but like I said addind a tag axle with duals and putting on an 18000 front axle you could then gross about 72000 and not have any problems this is what I figure you could do with your jimmy, 18000 front axle 34000 tamden + about 20000 for a tag with dauls this way you would have a nice heavy hauler my math may be a little off, but I am sure real close.



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JDPete

11-02-2004 10:48:52




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 Re: OT- Determining Axle Capacity in reply to Can't even use my name, 11-02-2004 04:44:34  
That odometer on the axle is called a "hubometer" and probably wasn't installed new. Companys use hubometer because they are more accurate and are hard to tamper with. The standard legal weight for a road tractor is 34K for the tandem and 12K for the steer axle. 46K total. A single drive axle can weight up to 20K legaly. If I remember correctly, drive axles less than 8 feet hub to hub are considerd as a tandem and that lowers the legal weight due to stress on the road surface. You could add a pusher axle in front of the tandem and increase the legal weight quite a bit.

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mike j

11-02-2004 09:24:00




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 Re: OT- Determining Axle Capacity in reply to Can't even use my name, 11-02-2004 04:44:34  
Around here (oregon) i dont think they look so much at the tag as they do equipment front axle can go 13.2 k here with 11.00 tires tandems only 34k could put a 4th drop axle under it and gain quite a bit and wide front tires would help to get a truckers road atlas that has the bridge law formulas (or anything that has them) and do some studying before you do anything to see what is legal good luck mike

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Can't even use my name

11-02-2004 17:47:13




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 Re: OT- Determining Axle Capacity in reply to mike j, 11-02-2004 09:24:00  
Not really worried about being legal. More worried about busting an axle.



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rustyfarmall

11-02-2004 06:02:41




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 Re: OT- Determining Axle Capacity in reply to Can't even use my name, 11-02-2004 04:44:34  
The 12K front axle and the 34K rear tandems is standard to all trucks. These figures are the maximum allowed by law. If you drive this truck across the scales at a D.O.T weigh station, you will be fined if your front axle weighs more than 12K, or if the rear axles weigh more than 34K. That being said, I will also add that you can safely haul more weight than the 46K without damaging anything, just be sure you don't go where you may need to cross any scales.

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Can't even use my name

11-02-2004 17:45:39




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 Re: OT- Determining Axle Capacity in reply to rustyfarmall, 11-02-2004 06:02:41  
Well that is strange. Our other truck has 44K rears and 18K front, that is 62K. Funny thing is all the axles look to be exactly the same as do the springs.



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Red Dave

11-02-2004 05:09:18




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 Re: OT- Determining Axle Capacity in reply to Can't even use my name, 11-02-2004 04:44:34  
Well Can't..., It seems to me that the DOT will go by the manufacturer's tag. Won't matter what axles you think it may have.
Check the title. In my state, I think the title would have to be amended if the GVWR was increased.
I've amended titles on trailers to change weight ratings. I haven't done it on a truck, but I think it would have to be something similar.



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