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#1741
09-20-2016, 06:40 PM
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Re: Great Dane excavating co.
Quote:
 nice to see your taking up the slack while Reg is off.  Seriously though, looking great RW. I know your a thorough kinda guy and crunched the numbers already   . What kinda power these bad boys going to have?
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#1742
09-26-2016, 08:37 PM
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Re: Great Dane excavating co.
Large stage should have about 270lbs at 350 psi. Small stage is around 70 pounds. And with two cylinders I hope the large stage goes up first and it should then middle and last small rod. And I'm going to have to play with pressure, if I don't need it that high I'll back down to minimum I can get away with.
Some more work.    The small tube is for retracting and hole is for extending stages.
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#1743
09-26-2016, 08:42 PM
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Re: Great Dane excavating co.
This was my first attempt to weld the internal oring caps on.
 I changed design to make it more user friendly for welding and having a nice square inside edge     Now I have to cut the vent ports,,, should work and then test how well my tolerances worked out. 
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#1744
09-27-2016, 10:42 PM
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Re: Great Dane excavating co.
    One more to clean up . I may have a fatal flaw in location of secondary vent hole?? If so I'll just have to make up a new secondary cylinder with hole in different location.
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#1745
09-27-2016, 10:56 PM
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Re: Great Dane excavating co.
Looking sweet! I welded up the piston rods like that for my Tigercat and it works great. Yours are 100 times nicer so they will work perfect.
As a bonus I give you this... 
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#1747
09-27-2016, 11:16 PM
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Re: Great Dane excavating co.
Thanks!! I thought my lil' nut eaters got run over or a hawk got them. Didn't see them for a week, today was first day the one came around. And it's defiantly him, can walk up to him. Don't know where his other got to. Probably flat on pavement.
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#1749
09-29-2016, 05:50 PM
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Re: Great Dane excavating co.
well I got everything hooked up and after all day yesterday messing with one cylinder I finally figured out the easiest way to bleed air, just run it!!! my testing was using a small hydro pump for up, then reversing the inputs for down, only problem was I was trying to pull/push air. once I hooked it up to the valve and ran it through a few cycles all air is gone . I'm uploading a couple videos on my slowboat internet, sometime later today? maybe tonight ? they are working, I may have cut my one stage oring a little big by .002" it leaks when fully extended, not bad but it also may be oring cut. as they were the first test rings and didn't replace them for this testing video to follow
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#1750
09-29-2016, 07:07 PM
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Re: Great Dane excavating co.
https://youtu.be/2E9kvMDDfhA
With bed on https://youtu.be/Qv_xOE2hU9Q This was the first time they both moved. I had my locations close, but I'm making new upper mounts for top pins to go into on the bed. They can be moved about 1/4" that will give about 3 more degrees of tilt. But the main reason for that is so the cylinders will be resting when bed is completely down and not under pressure. I still don't know how much she will lift, with all the math and measurements to take I just hope a wet bucket of sand . And I only have light duty hose hooked up. I did order more 350psi hose and found some 5/32 700psi rated hose. As long as I can keep fittings together I'm sure I'll have the power to lift. I don't know what pumps are rated but it's the one from premacon and I know I'll never have something to max out one of those pumps. Now for this project the larger pump they offer may have been better for increased flow. Takes a good bit of oil the full those cylinders. 1" top stage, 3/4" second stage and 1/2" third. Glad I made a big tank .
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#1752
09-30-2016, 04:50 PM
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Re: Great Dane excavating co.
https://youtu.be/TGXxCXm2ySk
Ran out of any heavy items to stuff in the bed!! I'm pretty confident that whatever I can get in the bed, the truck will be able to dump it!! I do have to cut a relief in the tank cover and move the pressure gauge housing on account of cylinders being I the way. Just enough to have to move them some. Originally I was planing on having the bolts on bottom of large stage just like the 1:1 machines but assembly was easier to make them the way I did.
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#1753
09-30-2016, 04:51 PM
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Re: Great Dane excavating co.
Quote:
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#1754
09-30-2016, 07:27 PM
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Re: Great Dane excavating co.
Cooper-I'm not being picky because this is a GREAT model but the dump looks a bit slow to me. Is this the finished version? However-this will give you time to grab a beer while it is dumping. Will you have limit switches on the box? Great work!!
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#1755
09-30-2016, 07:49 PM
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Re: Great Dane excavating co.
Looks good RW, I wouldn't think a 5 gal. bucket of wet sand would weight more than the steel you stacked in the back. I'd say it'll lift about anything you could or would actually haul in it. Can't wait to see it finished and in the dirt!
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#1756
09-30-2016, 08:05 PM
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Re: Great Dane excavating co.
Quote:
. A lot of oil is being pumped into those cylinders. She is far from finished, still just finding out if things work. .
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#1758
09-30-2016, 08:08 PM
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Re: Great Dane excavating co.
Someone wanted to see a size comparison of this 1:14 scale 785 with same d11. For those that have seen the dozer in person. ,,,
   She is a haul truck new way to tote around the d11
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