G.P.M. Flow rate EC250E Volvo excavator?

Machine is a EC250E Volvo, s.n.# vcec250ee00310399.
I am wanting to install a seppi mulcher. I'm needing to know the flow rate of the auxiliary hydraulics. The options it gives me in the cab as far as attachments go, are for a shear and hammer. I don't know the gpms for either option. I'm needing 35-40 gpm flow to run the mulcher. Any help would be appreciated.

You have 2 pumps at 240 lpm . That equates to roughly 60 gpm x2. Plenty of oil to run your attachment.

In your operator's manual you will find a page describing how to set up a profile for an attachment. Ideally you would want to have a service men come out and set the maximum pressure for your Attachment that you are going to be using and verify that the flow matches closely what the display panel setting is set at. There was talk of making it where pressure and flow could both be set in the display. I hope this helps you.

Thank you funwithfuel. Can the pressure be set manually or does it require a laptop. The requirement for relief on the attachment is 5,075 psi.

Usually it's a manual adjustment to a 2 stage port relief and depending on whether one way flow or bi-directional.
In the display panel, go to home screen, scroll down to service, press and hold enter key till the screen says entering service mode. Once in service, a spanner character should be shown in the bottom. From there you can see your pressures. It will take a little poking around to find what you're looking for. I think you're going to find that your main is much lower than your max desired for the implement. 5260 is max work pressure for option. You can monitor the pressure from the display. You have to have some level of experience to perform these adjustments manually. I will be glad to help you further but I don't know your comfort level.

I'm confident in my abilities. I've been turning wrenches for 20 plus years on heavy equipment. I'm just not familiar with Volvo. Although there are some here. Cat, Hitachi, John deere are mostly what is used here. I do appreciate your help. I am a little confused as to where I would find this two stage relief valve. And I'm not sure which one to adjust. The attachment is a single flow. And as I understand it this two stage relief valve is set up for bidirectional flow so that you can adjust relief on both sides. I will be installing it this weekend and i'm just searching for answers so that I can set it up and adjust the speed of the drum.

Okie dokie. If you pull the belly pan beneath the MCV and look up you should see the 2 stage with a servo hose attached. First. Mark your main relief and crank her in. Then, You would bottom out the base end closest to the valve, adjust the outer(low side) then bring high side back to match low side, it'll probably drop off pressure as soon as you come off bottomed out. It's a little touchy feely. Then put your main back. After you've adjusted main, go back to your display panel and tweak your flow settings. The values are mathematical possibilities, not real. The only way to confirm is with a flow meter.
Make sure you don't have 2 pump flow. In 2 pump, you get 100% of pump 1 with proportional pump 2 added in.
It's a pain in the butt, but you'll do fine.
In your profile set up, it will ask push, or toggle. Push is on while you push the button, toggle is push once, it continues to run till you push again.
Good luck

Thanks again funwithfuel. Let's see if I got this straight. I will increase the main relief pressure, then crank the high side until it bottoms out. And then adjust the low side to my desired pressure, then adjust the high side to match. And then set the main relief back to what it was . When you say 2 pump flow are you referring to bidirectional flow, as to one directional flow?Meaning hammer and shear setting? Thanks again for your help.

Paul Council said:

Thanks again funwithfuel. Let's see if I got this straight. I will increase the main relief pressure, then crank the high side until it bottoms out. And then adjust the low side to my desired pressure, then adjust the high side to match. And then set the main relief back to what it was . When you say 2 pump flow are you referring to bidirectional flow, as to one directional flow?Meaning hammer and shear setting? Thanks again for your help.

Click to expand...

2 pump flow is an option for attachment that require significant oil flow . It's an expensive option. you would have needed it for something like a Movac or Hercules sheet driver or genesis shear. X1 which is basic hammer and shear uses just that, 1 pumps oil flow for the attachment, 2nd pump performs work like lift arm n bucket. . In X3 there's an additional gear pump mounted above the work pump, that is for slope and rotate of the implement like ditching or maneuvering a processor to take a bite. If it doesn't prompt you about 1 or 2 pump flow in set up, I wouldn't concern myself.
Yes, you get the pressure setting, it's hard to get people to understand right off. High side has to be slightly above low or they'll argue with each other.
Again. good luck.

Main relief spec for that machine is only 4836psi max tolerance is 5049psi. boost is 5265psi but at that pressure you are close to bumping port reliefs.as FWF said you can turn the main relief in a couple turns or just use boost mode to adjust your port relief. The high side of the 2 stage relief should be set at 5482 so you should not need to move that one. the low side adjuster is the hex that the fitting screws into. Just loosen the lock nut below that and adjust the low side until you get to 5075, should be about 2.5 turns in.. You can accomplish this by clicking the boost button while in hammer mode (set to 240 lpm)and the valve at the end of the stick shut off.

Make sure your main relief gets back to proper spec if you move that.

This machine came with 2pump flow but don't worry about that just set your flow at 35gpm and start with that.

Optimally it would be best to have someone with knowledge on the machine and have them set it up they way it should be.

Paul do work for Herc or are you a contractor?

To answer your question Ben, I am a contractor. I do have a good understanding of hydraulics. And I'm confident in my ability to set up this attachment. Although I am not familiar with this machine. For me it's just a matter of knowing where this manufacturer put the components. I went out this evening to get a parts list for hoses I will need to install the mulcher. While I was there I thought that I would change the settings and adjust the pressures. I found everything you and funwithfuel have described to me. My problem is that I can't get it into hammer mode. I did all the steps to set it up and saved it. But when I push the hammer shear button it just defaults to shear, no matter what I do it will only go into shear mode. I searched and searched in the operator's manual but found nothing on how to change modes. Any help with this would be greatly appreciated.

Were you in service mode when trying to select hammer mode? I believe you have to exit out of service mode to change between tools. The next time you key on it will default to normal mode and you should be able to switch modes.

I tried while in service mode and then turned the unit off. But still it would default to shear mode. You must have access to prosis to know that the machine is owned by herc. I worked for a Volvo dealer for a very short time. The dealership was sold and I didn't like the new management that came with it, so I left. I was there long enough to get trained in the software but not long enough to get familiar with Volvo equipment. Thanks for your help. I will be double checking about the attachment relief pressure tomorrow. Either this machine isn't big enough to run it or I possibly have wrong information from seppi.

I think you have to scroll down to X1 tool and select from there in the main menu. And I believe you've got to press and hold the enter key to select the tool you want from profile menu. Then when you raise the safety lever it should briefly display the tool profile on the screen, for example,
X1
one way
40 gpm
push
Hope this helps

Okay I reread my email about the setup. The mulcher doesn't need to relieve at 5,025 psi. That's the maximum working pressure. Thank you guys so much for your advice and help for me in this. All I need to do now is get the machine to go into single flow mode.

Thanks funwithfuel. I will give it a go tomorrow. I will post an update on my success and pictures as well. One of my pet peeves on this forum is, when someone receives help and good advice. There isn't any update on whether the problem was solved or not. Cliffhangers

Today was mostly successful. I went to the hose shop today and had the hoses made. Installation went fairly well. I was able to get the one way hammer option selected and the flow set. After a quick test for leaks, I then started to adjust the drum speed. Wouldn't you know that my photo tach went on the fritz. So I jumped in the truck and drove an hour away to the shop to get the other one. I spent about a hour looking for it but couldn't find it. Bought a new one and went back and I was able to set the drum speed. I then performed a performance test and the mulcher failed miserably. I have the correct flow and speed but not enough working pressure to keep it from stalling. I then started to adjust the pressures and not being familiar with this machine. I wasn't confident enough to go about it. I wasn't sure that what I thought was the 2 stage relief ,was actually it. And then I wasn't certain if what I thought was the main relief was right either. So in the interest of not tearing up equipment that's not mine and losing face with a new customer. I called it a day. Customer was very understanding and appreciative of me knowing my limits. So Monday I will be calling the local Volvo dealer to get a email for the correct procedure. Thank you so much funwithfuel and Ben for your support and answers. If you guys have a way to get me the procedure or maybe explain it further with me would be much appreciated. Either way thanks again for the support.

Thank you funwithfuel! If I ever find myself in your area I will buy you a steak and a beer (if you drink that is). I went out this afternoon and I got it on the first try. I had to go back out today. I couldn't stand the idea of the customer not getting to use his $60k attachment for another day. The X1 circuit didn't have a sensor to read the pressures but I had my excavator pressure test kit. Everything works as it should now. Thanks again.

In the future, just read pump pressure from the display panel. That's a lazy guy cheat.
Glad to see you got her all straightened out.