Adding a valve, how important is GPM matching pump output.
- Thread starter EMB5530
- Start date
- Views: 23683
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
Are you referring to open center hyd system, which uses either open center valves, or tandem valves, where the pump fluid is flowing all the time. .
Closed center hyd systems, use closed center valves, where there is no flow until the lever is activated..
Closed center hyd systems, use closed center valves, where there is no flow until the lever is activated..
TomSeller
Super Member
Well I am not sure. From your post above I was assuming that tandem valves were not considered open center because it doesn't describe them as such. Or are tandem and motor spool described above both open center?
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
A motor spool valve can be open or closed center.
If a closed center motor spool valve is used with a hyd motor, there is no fluid flowing through the valve when the valve is in neutral.
If a motor spool valve is used with an open center valve, there is fluid flowing all the time through the valve.
The motor only runs when the lever is operated.
This is an open center motor spool valve . If you use the closed center adapter, you can convert it to a closed center valve.
http://www.surpluscenter.com/Hydrau...L-8-GPM-PRINCE-MB11C5C1-MOTOR-SPOOL-VALVE.axd
If a closed center motor spool valve is used with a hyd motor, there is no fluid flowing through the valve when the valve is in neutral.
If a motor spool valve is used with an open center valve, there is fluid flowing all the time through the valve.
The motor only runs when the lever is operated.
This is an open center motor spool valve . If you use the closed center adapter, you can convert it to a closed center valve.
http://www.surpluscenter.com/Hydrau...L-8-GPM-PRINCE-MB11C5C1-MOTOR-SPOOL-VALVE.axd
Wowsers, OK so let me try to pick the info out of this that I feel I need to know before making any decision on valve type.(Was not sure the post was going to be this good/informative
)
A motor spool can be used with a hydraulic cylinder and still keep the cylinder in a held position when the valve has no work/fluid flowing through it. Is that then correct b/c I thought that it would let any fluid flow freely back to tank thus floating the cylinder.
Also, the only motor I plan(as of right now)to run would be a post hole digger. Which please correct me if I am wrong would not have enough inertia to warrant the need for a motor spool?
Although when I bought my place, in one of the garages I found a hydraulic chain saw. Though I have done no research on the pump, because I haven't had a need for it. I am lead to believe that it probably takes more gpm than my tractor could put out w/o a higher flow pump off of the pto, which would then warrant buying a motor spool valve. But that is a whole nuther can o beans which is out of the relm of where I started this post.(But for the sake of info/my own fun confusion am still willing to discuss)
)A motor spool can be used with a hydraulic cylinder and still keep the cylinder in a held position when the valve has no work/fluid flowing through it. Is that then correct b/c I thought that it would let any fluid flow freely back to tank thus floating the cylinder.
Also, the only motor I plan(as of right now)to run would be a post hole digger. Which please correct me if I am wrong would not have enough inertia to warrant the need for a motor spool?
Although when I bought my place, in one of the garages I found a hydraulic chain saw. Though I have done no research on the pump, because I haven't had a need for it. I am lead to believe that it probably takes more gpm than my tractor could put out w/o a higher flow pump off of the pto, which would then warrant buying a motor spool valve. But that is a whole nuther can o beans which is out of the relm of where I started this post.(But for the sake of info/my own fun confusion am still willing to discuss)
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
Read the valve definitions above again.
Don't confuse the use of a closed center valve. It can be used with a motor spool . There is no fluid fluid through it unless the motor is turning. Therefore the name closed center.
No, a motor spool valve should not be used with a cyl. You will be able to raise a cyl, but as soon as you return the lever to neutral, the cyl would collapse, as all ports are connected to tank.
You can probably run an auger motor with a cyl/tandem spool as it is only turning at about 150 to 300 rpm using a tandem valve.
Just slow the auger speed slowly until it stops turning, and release the lever to neutral.
Don't confuse the use of a closed center valve. It can be used with a motor spool . There is no fluid fluid through it unless the motor is turning. Therefore the name closed center.
No, a motor spool valve should not be used with a cyl. You will be able to raise a cyl, but as soon as you return the lever to neutral, the cyl would collapse, as all ports are connected to tank.
You can probably run an auger motor with a cyl/tandem spool as it is only turning at about 150 to 300 rpm using a tandem valve.
Just slow the auger speed slowly until it stops turning, and release the lever to neutral.
Ok, thankyou I guess I just didn't read your previous post correctly. I shall read the posts instead of just looking at the words:ashamed:
Now back to some other previous posts! Brian you said you had a valve you were able to price me? I am interested in seeing what you have. Running a cylinder on a grapple will probably be the #1 use and also the tilt on a snow blade. I just don't want to leave myself high and dry if I were wanting to run an auger.
Right now I run an auger from the pto, and i've built a bit for it that I use to mix saw dust and wood chips into the ground in order to plant trees. I don't know if I will ever replace doing it from the pto to up front on hydraulic but just trying to get enough info to know what my options really are.
Now back to some other previous posts! Brian you said you had a valve you were able to price me? I am interested in seeing what you have. Running a cylinder on a grapple will probably be the #1 use and also the tilt on a snow blade. I just don't want to leave myself high and dry if I were wanting to run an auger.
Right now I run an auger from the pto, and i've built a bit for it that I use to mix saw dust and wood chips into the ground in order to plant trees. I don't know if I will ever replace doing it from the pto to up front on hydraulic but just trying to get enough info to know what my options really are.
MtnViewRanch
Elite Member, Advertiser
- Joined
- Mar 19, 2005
- Messages
- 10,638
- Tractor
- Mahindra 7520, Mahindra 3215HST, Case 580 extendahoe, Case 310 dozer, Parsons trencher, Cat D6,
Checking on one that is the right size for your tractor. The size that I normally would sell is to small for your tractor. I'll get back to you next week.
TomSeller
Super Member
My auger at full rpm is slightly less than 1 rev per second, very slow. And I usually don't run it at full rpm on the engine so it is at 1/2 or 2/3 rev per second, even slower. It pretty much stops right away anyway.
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
Then you should be able to run an auger from the grapple circuit on the front whenever you decide.
Just remove the grapple or unplug it and plug in the auger.
The GPM's to the auger is controlled by the engine rpm or the position of the control valve.
Just remove the grapple or unplug it and plug in the auger.
The GPM's to the auger is controlled by the engine rpm or the position of the control valve.