Dump trailer

GeneD14 · Mar 2, 2006

Nat,

This is a great project. I'll be watching your progress. You have got some guts taking on a big one like this! Looks good so far. /forums/images/graemlins/grin.gif

Renze · Mar 2, 2006

Nat, how are you going to power the dumpwagon's hydraulics ? With an electric driven hydro pump ?

About 10 years ago there was a manufacturer here in Holland, that tried to sell small dumpwagons and even container bin carriers in the 1200 kg class to be pulled by a midsized passenger car, or 2000 kg class to be pulled by a Van or jeep...
It used a belt driven oil pump under the hood with ISO quick couplers to the trailer. I've seen the leaflets and heard my brother talking about building one himself. I've never heard from the manufacturer again... /forums/images/graemlins/smirk.gif

Todays they do sell 2000 kg three side tippers with battery powered electrical oil pump drive, a local guy has one.
For electrical power it relys on a battery charger every night, and to access the batteries you need to tip first... So you have a problem if you find your batteries dead with the tipper being down... /forums/images/graemlins/confused.gif /forums/images/graemlins/grin.gif
First thing this guy did was making a charger extension cord.

By the way, your work looks very solid !! Too bad my European Volvo 440 1.9 turbo diesel isnt allowed to pull any more than 1200 kg.... /forums/images/graemlins/smirk.gif

jimmysisson · Mar 2, 2006

On our dump trailers the hardest thing is the first inch or two of lift, due to the cylinder geometry. That strains the batteries pretty hard, even though they're hooked into the pickup charging systems through the 7-way connector. Your setup looks better than the Cam Line we have now, as you have a bit of angle on the task right when you start to lift. Keep up the pix, please.
Thanks, Jim

drmiller100 · Mar 3, 2006

to figure out lift capacity:
half the diameter of the ram is the radius.

3.14 x R x R x PSI of hydraulics.

so, 3.14x2x2x1500 equals 18,000 IF the ram was vertical, and rigth in teh center.

getting the ram as vertical as possible at the start of the lift is important.

Axles are the most expensive part. 500 bucks a piece, without tires and wheels?

Nat · Mar 4, 2006

Ist I bought a hydralic pump/valve/motor/resivoir combination to power it with, cost 399.00 at Northern
2nd. I have a 4" diameter cyl so radius of 2 squred=4X pi-3.14=12.56 time 1600psi=20096 of push at the ram end.
I don't know how to tell excatly how much it will dump because the cyl isn't perpendictular to the trailer bed. The anchor end is 11 " lower than the live end and the live end is 6'0'' from the hinge, someone smarter than I may be able to tell me, but I know it will work, just can't prove it on paper.
As far as the axles and tires, I'm buying Mobile home axles and cutting them down to length. The place I buy them from sells the brake axle for 75.00 and a non brake:IE tag axle for 60.00 The wheels and tires are 25.00 each and when they wear out in another 1500 miles I always buy Lowboy Tires to replace them. They sell for 96.00 here and will weather crack before they wear out.
I will have steel floor and tailgate, the front and sides will be treated wood.
HTH, later, Nat

rswyan · Mar 4, 2006

( I don't know how to tell excatly how much it will dump because the cyl isn't perpendictular to the trailer bed. The anchor end is 11 " lower than the live end and the live end is 6'0'' from the hinge, someone smarter than I may be able to tell me, but I know it will work, just can't prove it on paper. )
Try using this handy calculator from Baum Hydraulics - it figures the amount of vertical push for a cylinder mounted at an angle. You will need some idea of what angle it is at in the initial position.

Angled Hydraulic Cylinder Calculator

Nat · Mar 4, 2006

rswyan, thanks for the link. That is a neat one. From that site it looks like I will have a lift capicity at the "live end " of the cyl of about 6877 lbs. That should dump more than I'll ever need to haul behind a pickup. Thanks, Later, Nat

Nat · Mar 6, 2006

Well, it's do-over time. I gave it a dry run today, by hooking up the hyd. hose and running jumper cables from my truck. My cyl. is to big. I run out of the 2 1/2 gal resavior before it is half way up. I had just measured the ram on my 2 stage cyl, and it was 4". That was fine , except the piston is actually 5". So I don't have enough volume of fluid to use that big of a cyl. It is cheaper to get another cyl, so I ordered it from Northern today. I'll also have to re do the mounts because the cyl I have has a welded end and the cyl. I'm getting is clevis mount. Not a big problem, but stil would rather it worked right the first time., Later, Nat

GeneD14 · Mar 7, 2006

Do the mobile home axles come with leaf springs? They seem like a good deal.

rswyan · Mar 7, 2006

Nat,

Glad to help.

( From that site it looks like I will have a lift capicity at the "live end " of the cyl of about 6877 lbs. That should dump more than I'll ever need to haul behind a pickup. )

Dunno what you are planning on hauling and dumping in the trailer but the weight can add up pretty quick. I have what I would call a light-duty 2 ton 4' x 8' dump trailer made by Country Mfg. .... it's strictly off-road use. I used it this past summer to haul about 100,000 lbs of wet sheep manure from my neighbors. I heaped it on each load and if I had to guess it was over 4000 lbs every load.

Based on how you are constructing your trailer (and how mine is constructed) I'd imagine that your trailer could probably haul double what mine does. Whether you have a tow vehical to haul it is another matter .... my Ram will pull 12K lbs. Having plenty of lift capacity would not be a bad thing. If you can increase the angle on the cylinder at it's initial position you can always gain some lift capacity.