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Hypothetical Hydraulic help.


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#1 UncleWillie ONLINE  

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Posted February 28, 2015 - 03:59 PM

I am thinking of building a 4wd doodlebug type contraption to lift things with. Not quite a front end loader more like a crane.

 

This is still in the completely hypothetical stages so bear with me.

 

IF it gets built I will need it to lift about 1500 pounds at a time. However I have no knowledge of hydraulics.

 

What would it take to get me to the magical 1500 pound mark?

 

The vehicle will most likely be a small pickup that I will shorten to the bare minimum length. IT will have a 4 or 6 cyl engine so running a pump won't be a huge concern as far a power goes.

 

So what am I looking at needed for a pump and cylinders?



#2 Auburn David OFFLINE  

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Posted February 28, 2015 - 04:22 PM

I have a 12v hydro set up that was used as a lift for a pickup truck dump bed..I built a floor jack out of it and it has worked like a charm(used it to lift a dodge Durango many times)..I also have a belt driven pump and cylinder that I got off an old trash compactor..I would think it would lift 1500lbs.


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#3 Auburn David OFFLINE  

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Posted February 28, 2015 - 04:24 PM

http://www.handyindu...AULIC_LIFT_.pdf

 



#4 Chopperhed OFFLINE  

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Posted February 28, 2015 - 04:39 PM

Try This

 

http://images11.palc...inedatabook.pdf


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#5 Bruce Dorsi ONLINE  

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Posted February 28, 2015 - 05:07 PM

 

That's a GREAT document which you linked to.  ....More easily read and explained than my college textbook was.

 

Thanks!


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#6 UncleWillie ONLINE  

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Posted February 28, 2015 - 05:15 PM

That is a lot clearer than anything else I have found. I was looking at one site and I would have to have an engineering degree to figure out what the first page said.


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#7 Bruce Dorsi ONLINE  

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Posted February 28, 2015 - 05:16 PM

 

So what am I looking at needed for a pump and cylinders?

 

Lots of variables to consider.

 

If you are using a boom, you will have a leverage effect, depending on where you mount the cylinder. 

 

Mounting location of the cylinder will dictate the minimum stroke your cylinder will need to have to raise a load to the desired height.

 

GPM displacement of the hydraulic pump will only dictate the speed the cylinder ram will move.

 

Bore size of the cylinder's piston will affect ram speed and force.


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#8 JBRamsey OFFLINE  

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Posted February 28, 2015 - 05:33 PM

For quick, easy and not as expensive--no hydraulics--look at using gin poles. All you need is a winch, wire rope, block and tackle, sheaves and some structural tubing. Google gin poles. They are used in the oil fields all the time. I've seen them pick up Cat dozers.

I wouldn't shorten anything unless you need a short wheelbase for tight quarters. It's easy to tip a crane and you will need all the weight and footprint available for stability.

How much reach do you want? If you want 10 feet of reach at 1500 pounds that's 15,000 ft-lbs back into your crane chassis.
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#9 glgrumpy OFFLINE  

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Posted February 28, 2015 - 08:11 PM

Stop this nonsense and go find a backhoe or old 4 wheel loader, maybe one that needs work and fix that up. Much safer. Big tractor much more usable than just a crane. Put forks on it, take off the bucket, Yep!  Handy!



#10 superaben OFFLINE  

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Posted February 28, 2015 - 08:14 PM

For quick, easy and not as expensive--no hydraulics--look at using gin poles. All you need is a winch, wire rope, block and tackle, sheaves and some structural tubing. Google gin poles. They are used in the oil fields all the time. I've seen them pick up Cat dozers.

I wouldn't shorten anything unless you need a short wheelbase for tight quarters. It's easy to tip a crane and you will need all the weight and footprint available for stability.

How much reach do you want? If you want 10 feet of reach at 1500 pounds that's 15,000 ft-lbs back into your crane chassis.

 

Very good points!

 

Ben W.


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#11 UncleWillie ONLINE  

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Posted February 28, 2015 - 08:21 PM

I want something small and very maneuverable.

#12 Arti ONLINE  

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Posted February 28, 2015 - 08:46 PM

Small Maneuverable and will lift a ton, Sounds like a Skid Steer Loader to me.

Either purchase one ready made or look one over and measure the lift mechanism the math is already done.



#13 JBRamsey OFFLINE  

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Posted February 28, 2015 - 08:59 PM

It's more than the lift mechanism math. Skid steers are 5,000 pounds plus.

#14 JBRamsey OFFLINE  

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Posted February 28, 2015 - 09:02 PM

UncleWillie, lots of opinions. Build what you want but watch tipping. Cranes are serious business. I would check into gin poles for the simplicity and cost perspective.

#15 Cvans ONLINE  

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Posted February 28, 2015 - 10:20 PM

Not many things as small and maneuverable as a small track hoe.

 

If that's not what you want I have an article and photo around here of a lift that a guy built. It's small and he can lift a big propane tank with it. I think he built it from a cut down S-10. Very low to the ground.






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