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Trailer comes off at 75mph
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"Answer: The SAME guy that insists you need a machine heavier than the dump trailer to pull it in turns. How utterly obsurd, misinformed and irresponsible. But I'm jis' sayin'
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Well I think there is a point of discussion here. I tried for a couple of years to rig up a trailer that would carry a 225 gallon water tank behind my tractor.
Everything I tried, including a steerable wagon running-gear, pushed the rear end of the tractor into a jack-knife on downhill turns.
In math terms, that was a 400 pound trailer with a 1875 pound load pushing a 3500 pound (ballasted operating weight) tractor sideways into the sagebrush with great regularity.
I finally solved the problem by going to a water tank half the size.........
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Trailer comes off at 75mph
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I finally solved the problem by going to a water tank half the size.........
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I don't recall anything about this, but wouldn't have brakes on the trailer have been the relatively easy solution?
Hydraulic surge brakes would work, but IMHO electrics would have been a more workable solution. Surge brakes aren't very effective when the trailer is at an angle to the tow vehicle.
We use electric brakes quite successfully behind tractors to prevent just such a problem.
Best of luck.
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Trailer comes off at 75mph
Unlike your situation, gravity wasn't part of the equation with Mr. Paul.
Buuuuut if you had brakes on the trailer you would be extolling the virtues of a CUT---I gotta think. Yes?
But I'm jis' sayin'
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Trailer comes off at 75mph
I understand when pulling there is an advantage to a heavier truck or tractor than to one that is (too) light especially if no brakes on the trailer. Not trying to discunt nor make any more of that but have a question of those who know the big rigs...what kind of weight are those big trucks and what kind of load do they haul? When you get to the double trailers any idea on the amount of load they run?
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Trailer comes off at 75mph
Hey Murf.... brakes? Maybe, maybe not. I drive around in low range at just about the same speed whether up-hill or down. Not sure how the brakes would "know" when to activate as I use the HST for stopping, not the tractor brakes. Manual switch? Maybe.... but by the time I would think I need it I am in the ditch, so to speak.
I suspect the loose sand and gravels I was driving on played a part in the towing instability.
EW.... I agree that gravity is the other wild card in this game and now that I think about it, I can transport my empty flatbed @ 2000 lbs and the unloaded dump trailer which is even heavier, down the same hill quite safely. So there must be some load geometry in play. The empty trailers present loads that are much further back than the water tank.
The water tank set-up was about emergency fire fighting during our summer lightning season, so the whole thing might have to do some limited brush busting to get on scene.
If I could have solved the problem with the trailer I would probably have run into traction issues on the sandy uphill pulls.
So I split the load. I figured 225 gallons might buy me some time until the big boys in the yellow truck get here, so I currently carry 125 gallons on a two wheeled trailer and a 65 gallon tank on the front forks.
Close enough.... and enough weight on the front axle to boost the traction on the sand dunes and gravel........
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Trailer comes off at 75mph
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Hey Murf.... brakes? Maybe, maybe not. I drive around in low range at just about the same speed whether up-hill or down. Not sure how the brakes would "know" when to activate as I use the HST for stopping, not the tractor brakes.
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No Mark, you're think of an inertial type brake controller, probably like what you would have in your truck. A pendulum reacts your vehicle stopping and applies the brakes.
We use a mechanical version called a 'time delay' type. The unit reacts to 12 volts on the trigger wire (brake light circuit) and after a preset delay period, applies a preset amount of braking power to the brakes. Both delay and amount of power are easily set on the unit. We mount them under the hood in a water-proof box.
The actuation is is caused by (depending on our application) either by a micro-switch on the brake linkage, or a push button, or both.
The other option would be to move the load a long way forward on the trailer, shifting a lot more of the weight onto the tractors rear end.
Maybe a combination of both?
Your other option is to skip the trailer altogether and use a saddle tank setup like those used on bigger Ag. units. You put a 50 or 100 gallon tank alongside the tractor on an underslung frame. If you carry the weight it adds traction, not diminishes it.
Best of luck.
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Trailer comes off at 75mph
Not sure what's available from JD for the 4115 but for the 4310 they sell a standard round trailer connector kit that probably has a brake pin. I've only used the +/- so far for powering an electric sprayer.
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Trailer comes off at 75mph
KT Big Rigs run a wide range of weights. The lightest 34,000 rears single wide tires truck as light as 16,000 to 20,000lbs they will pull trailers to 60,000 gross 80,000.
Our trucks are very heavy 24,000 to 26,000 4 axle tractors double framed 500hp 18 spd trans 46,000 rears and 3 axle trailers. 44,000 light weight and good to 117,000 lbs gross on state highways.
Our trucks are little compaired to the Michigan big boys.
In NY the Thruway 53' doubles can weight to 130,000+ (I think).
I trust my homemade trailes very much I liked Murf's thoughts.
Harvey
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Trailer comes off at 75mph
Yup Harvey and that's why our roads are so torn up. And those (Murf cover your ears) Canadian trash haulers which can haul 100 cubic yards. Some steel haulers (I think) have sometimes 9 axles.
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Trailer comes off at 75mph
Harvey, thanks.
A few years ago I worked for a heavy equipment manufacturer. The rigs that got my attention were from Texas. No idea now of the accurate number of axles they had but all or most weight was on the trailer as the trailer had it own load supporting front axles and it own fifth wheel. Little over kill for what they picked up from our plant but sure was impressive when they pulled in.
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