D9R and 463 pull scraper

[ihbuilder]

looks sweet Joe , Now get some dirt in it . Off the top of my head , restrict the flow to the apron . If that makes sense

IHSteve

[pugs]

Looks great!

[Snochaser]

Originally Posted by ihbuilder

looks sweet Joe , Now get some dirt in it . Off the top of my head , restrict the flow to the apron . If that makes sense

IHSteve

That was my only thought. Looks good. Get that dirt rollin' over the sides!!

[dirtpusher9]

Originally Posted by ihbuilder

looks sweet Joe , Now get some dirt in it . Off the top of my head , restrict the flow to the apron . If that makes sense

IHSteve

That's a good idea Steve. Have to get some more fittings.

[JAMMER]

Joe that looks great and as far as your problem how about a valve in the with a servo to cut off or reduce the flow, it will go to the least resistance. Ed

[9W Monighan]

Originally Posted by dirtpusher9

That's a good idea Steve. Have to get some more fittings.

On the cable scrapers I've run you pull on the lever and the door opens and then the ejector pushes forward. Then when you push the lever away the ejector moves fast to the rear before the door closes. You may need to put a needle valve that meters in one direction and free flows the opposite. So you may need two to dial in both functions. I have a small 4-1/4CY Soil Mover scraper that has a valve body in the lines to regulate the flows.

[Lil Giants]

Mine has rubber bands on the ejector so it doesn't move forward till the crowd is all the up.

[dirtpusher9]

Here is a video of what it is doing.

http://www.youtube.com/watch?v=LGpi0BcaCnc

[td9clyde]

Hey Joe try it in the dirt first you get a load in it it should hold your ejector back i would try it in the dirt might work then

[ihbuilder]

Originally Posted by Lil Giants

Mine has rubber bands on the ejector so it doesn't move forward till the crowd is all the up.

joe ejector is the crowd apron is what you mean , I think .

Joe DP9 , what joe did will work try that or play with some springs till you get the right tension before changing the hydros . Also , just a thought on keeping the dirt out of the crowd roller path , see if you can put some kind of rubber wiper on the crowd to keep the floor clean . I've been thinking of this for my 2 $scrapers .

IHSteve

[Tamiya Cowboy]

Looks great Joe a true work of art for sure. I think what Steve is saying will work or the dirt in the pan. It looks in the video that there is more resistance in the cylinder for the gate then on the crowd.. Springs holding it back or a valve block restricting the oil flow to the crowd should fix the issue.

[pugs]

Do they make sequence valves small enough??

Otherwise you could put pressure relief valves in the gate cylinder lines (and a check valve in each as well), but have the dump of the pressure relief valve run the crowd cylinder instead of being a tank drain. This way the Gate cylinder would open fully first, then the relief valve would allow fluid to the crowd cylinder. Need the check valve in the non pressurozed side to allow fluid from the rod end of the crowd to bypass the pressure relief valve on the rod end of the gate cyl and return to tank. Same thing in reverse.

I'll see if I can't draw up a schematic quick of what I mean.

[pugs]

A crude drawing but it should work. Only downside is the the crowd will retract after the door goes down. If you want that to be reversed then just switch the relief valve and check valve directions on the rod end of the cylinders to make the sequence that the door opens first and closes last.

As drawn the door opens first and closes first. The pressure reliefs would be set just a tad higher pressure than is required to operate the Gate reliebly, but also under system pressure.

I'm not sure what is all available in the small hydraulic valves and such, so hopefully there is something you can fit in.

[ihbuilder]

you don't want to much resistance . just enough to get the apron open when empty . when loaded you'll have plenty of resistance

IHSteve

[jffhrvstr]

Nice work on the dozer & scraper!

[D8R]

Can´t wait to see it working!
For my own calculations, have you messured drawbar force from machine?

[rc_farmer]

Joe your pan is looking mitty fine.....can't wait to see it in Stlouie

[modelman]

Joe-your scraper looks great! I'm sure you will get it worked out. Can't wait to see it load & unload!

[dirtpusher9]

Thanks guys, it wont be long now. I put it in the dirt and MAN it does good, dozer has plenty of power, it loads like a dream, and a BIG bowl full. However the only problem is that the apron gets dirt hungup in between it and the bowl, not letting the apron move. So I think I'm going to cut the apron sides down a little and see if that helps. Going to put a stiff arm on the apron too and maybe it will force it some. I think once the apron is working right, it will solve the resistence problem. The crowd didn't hang up at all like I had thought it would, so that made me feel better. Steve, I have leather sweeps in front of the crowd too keep the roller track clean.

Dan, the dozer will push a little better than 200 lbs, not sure on the drawbar pull yet.

Thanks for all the imput guys and the drawing Jeff.

Hope to have a video soon. It looks so cool running around, not rubbing it in, just excited.

[SmallHaul]

Wow, your scraper looks great! Even just the vid of it running on the bench looks cool.

Very nice work. I can't wait to see it full of dirt.