Volvo EC300D

[steamer]

Oh, Oh, Looks like you were doing some shopping at Princess Auto. It looks like 110 volt items, are you going to have generators on board. Man these things are going to be BIG!!!!!!!!!!!!!
Rob

[RCP57]

Originally Posted by steamer

Oh, Oh, Looks like you were doing some shopping at Princess Auto. It looks like 110 volt items, are you going to have generators on board. Man these things are going to be BIG!!!!!!!!!!!!!
Rob

HAHA! Yep, Pricess Auto. There is something strange about buying brand new power tools and tearing them apart without ever plugging them in... I figured that this was the cheapest way to buy myself some large ring and pinion gears though. I spent most of the day on the lathe today and have made a little progress but I'm not quite ready to let the cat out of the bag just yet.

Reg

[RCP57]

Finally had time last week to order up some decals for the 300. They were done yesterday so I stuck them on. The scale of the decals is a little off(small) but they look OK, I may have them redone larger though if it continues to bother me. I also did the windows for the cab today... finally! I have no plans to do any more to this machine until the hydros are done so I guess it's a good thing I've already started something else....

Reg

Thanks for lookin!

[RCP57]

I spent a little time on the Volvo today. I changed my swing bearing setup a little as it now rides on two bearings instead of one bearing and a nylon bushing. This seems to have tightened up the slack that was there before so I'm happy. I also ruffed in all my hydaulic lines. My father inlaw should be finished the valve block in the next week so I'm getting excited about this thing again!

Reg

[Espeefan]

That looks really good! Almost like a mass produced machine. I am sure that you'd have some guys lining up to buy something like this, if you offered it. If you build they will come! But it really does look the part! I'm interested to see how it performs!

[RCP57]

I made up this planetary drive for my jung pump out of some stuff I had lying around(cough..hoarder). It ain't pretty but neither am I! I'm not sure how this will workout because I don't have a valve block yet but it seems to build enough pressure to split hoses without slowing down hehe oops! 30bar is no problem... I've run it with three cylinders going at once and it seems like its OK for speed but it might be too slow once I'm running it all at once. Time will tell...


Reg

[doodlebug]

Hey Reg, that's a neat idea! and no expensive belt's to fuss with. I'm looking forward to seeing the beast in action! Will you take a picture of the pump, with the standard unit of measure? pop can or beer bottle. Tape measure take's the fun out of it!
Cheer's, Neil.

[RCLogger]

Good work Reg

Is the motor and planatary from a drill ?

greg

[Vanisle]

That didn't take you long to figure something out. Nice work.

[RCP57]

Originally Posted by RCLogger

Good work Reg

Is the motor and planatary from a drill ?

greg

Maybe.... LOL It's a strange set up but it ended up working OK at least as far as the hook up is concerned. It pumps a huge amount of pressure without labouring but only time will tell if it turns fast enough to move enough oil for the size of the cylinders. I made a belt drive set up too using some stuff that I had but the pulleys didn't provide enough reduction and the motor would stall at 18bar so I went on to build this. The valve block should be finished today or tomorrow so I really have my fingers crossed that it all works. It's been nearly five months since I started this build and I wanna play!

Thanks for the compliments guys!

[modelman]

This machine looks as good as the hi-dollar models that are out there! Guess the proof will be when you get it "in the dirt". Good job.

[Madda]

I really like your build, very clean and precise!

How did you installed the windows? Just cut them very accurately and glued into the "pocket"? It's just that the windows look good and I'm searching for ideas on my build.

So you made all your hydraulics by yourself?

[RCP57]

Originally Posted by Madda

I really like your build, very clean and precise!

How did you installed the windows? Just cut them very accurately and glued into the "pocket"? It's just that the windows look good and I'm searching for ideas on my build.

So you made all your hydraulics by yourself?

Thanks,

Yes the windows are cut slightly larger than the cut out, and glued in place on this model.

I can't take any credit for the hydraulics other than making the drive for the pump. The pump itself is a Jung, and the cylinders and valve block were made by my Father-inlaw.

Reg

[RCP57]

My father inlaw finished the pieces of the valve block today. I have to do a couple things and then assemble it. Hopefully it works

Reg

[Madda]

Whoa! Nice valves you've got! I hope it works out for you, I like when people try to make their own hydraulics because buying them is 5 times more expensive!

I googled Jung but I didn't find any site related to this pump, can you give a specific link?

[carp]

its http://www.jung-fluid.de but i think site is down at moment or at least i cant access it, they dont have prices on there you have to email but they are reasonably priced, the 0.3ccm pump which is in the vario excavators they quoted me 74 euros + tax and shipping and the 0.46cc was 80euro plus tax.

[Madda]

Okay, thanks! I hope this site will be back soon. Prices seem reasonable, I've got quotes like 200-300 euros, I don't remember these sites though. Do you have any idea of their cylinder prices?

[RCP57]

So I've been wrestling a big problem with my valves... The one my Father inlaw made is very nice and it works perfectly(the bucket will stay up for days) BUT... it is large and at 30bar it is impossible to turn without pliers. I spent 12 hours the day before yesterday making my own valve from scatch that is much smaller and it does work a lot better but it is still stiff considering the size of it.

What am I missing???? There must be something simple that is done to this style valve that allows them to turn more freely under pressure. I tried drilling a small hole in the oil passage way on the pressure side of the plug(valve) to allow oil pressure into the top of the valve body but it didn't seen to help.

Does anyone know what we are not doing that needs to be done? Any help would be appreciated!!!


Thanks Reg

[steamer]

Reg, the only suggestion that I would make is to change from the round actuators on the spools to leavers. If you stagger the height of the arms then you could run every other spool with two servos on each side instead of direct drive. Then make the arms as long as needed to get the torque to move the valves. Hope this makes sense.
Rob

[JAMMER]

Could your problem be something simple like come in the side and go out the top. You have every thing coming in the top and out the top and that seems to load the valve on one side and binds it. Ed