Pulling Sled

[Anonymous-0]

We are build a pulling sled for 3500 to 14000 weight class need alittle help. Is it best to run the wheels for the box in the I beam frame or on top? Will two #80 chains be strong enough to pull the box? What do you use to make self proplled? Throught of using a car transmission being driven by a hydraulic motor and then take it out of gear for pulling.

 

[Anonymous-0]

It would be much safer to run the box wheels inside of the frame rails. Makes it much harder for the box to come off the rails in case of an accident or malfunction.

Greg

 

[Gearnut]

(quoted from post at 11:43:05 12/20/11) We are build a pulling sled for 3500 to 14000 weight class need alittle help. Is it best to run the wheels for the box in the I beam frame or on top? Will two #80 chains be strong enough to pull the box? What do you use to make self proplled? Throught of using a car transmission being driven by a hydraulic motor and then take it out of gear for pulling.

Josh, if you use a "wide flange" I-beam the flanges are straight meaning it will be easier to fit rollers to the underside (to keep the box from coming off). Depending on your total gear reduction, you may need something as powerful as a big block V8, or with enough reduction (like an additional 3:1 transfercase in line) you might get away with a 4 cylinder engine. The hydraulic motor will eat up a little power, but it's an interesting idea. The sleds I've studied use an old 2-speed truck rear end. They grind-off the high side gear allowing them to shift the rear end into high when moving the sled around (down the highway,etc). Saves pulling the drive shaft. They simply leave it in neutral when a tractor pulls the sled. Not sure on the #80, as most use #120 from what I've witnessed. #120 can be found on ebay fairly reasonable. Not sure where you are located but if you're anywhere near the midwest, I'd highly recommend taking a look at the small Nearpass sled, take some measurements, etc. Seems to work good and it's not real big. I've studied it as well as the one Wheatland uses up in Remus, Michigan. A real piece of art. Mark

 

[LCB]

You might consider a combine hydro to move sled around then you can adjuist power to speed.

 

[Josh IN]

Gearnut do you have any pictures of your way to drive the sled. By going that way could you use the motor to move the box? Want to use an AC WC motor,chevy 292, AC 2800 Diesel(190/F2).This sled will have two truck axles, the front one will move the box and the rear will move it this will be turned backwards so the driveshaft will face the the back.

 

[Eric Bloom]

just my opinion. but unless you are building a drop pan sled that will jack the rear of the sled off the ground then i would put the motor in front of the axles. with it behind the axles you are going to need that much more weight in the box to get the same result.
Eric

 

[AJBpuller]

My club's sled we just went to a school bus auction and bought a 5.9 cummins and auto trans and connected that to our back axle for drive and used our front axle to drive the box, and used an air clutch to disengage the box when we're moving the sled.

 

[Justin C.]

Josh, e-mail me and I will e-mail back pictures of everything you need on how these are set up.

Justin

 

[Gearnut]

Josh sorry I just noticed your note. Yes, I have a lot of pictures of these 2 sleds and would be more than happy to share them with you. Email me. Put "sled pictures" in the subject and I'll keep my eyes open for your note. Mark