Loader GC2310 hydraulic issues...again!

[slb04786]

Look again at the link I provided above for the GC hydraulics. The backhoe valve is shown on that. But be sure to scroll down to the last post with the latest drawings. Those also show the loader lines albeit on your older model the coupler colors may vary.

I have looked back at your earlier threads on hydraulic problems and have refreshed my mind about "where we've been".

Good luck.

Dicktill,

Thanks. I had looked at your schematic of the hydraulics with loader and BH last night. Mine looks about the same but I was always under the impression that there was one pressure line to the BH from PB port and 2 return lines to the tank reservoir but looking at your schematic one line is a pressure line to the main control valve. I went to my local dealer and bought the “flow divider valve” they had in stock. I got to speak to a service person who has some familiarity with the GC2310 TLB. He told me those valve don’t go bad. He said the reason they had one in stock is probably because someone else thought they had a bad valve, ordered a replacement, and it wasn’t the problem. He said he would be looking at the hoses and coupling for the BH to be a problem. I bought their flow divider valve with the understanding I could bring it back if I didn’t install it. He said it was a head scratcher. I’ll let you know what I find when I get back to the tractor. 40 minute drive to my son’s house.

 

[Dmacleo]

He said he would be looking at the hoses and coupling for the BH to be a problem. I bought their flow divider valve with the understanding I could bring it back if I didn’t install it. He said it was a head scratcher. I’ll let you know what I find when I get back to the tractor. 40 minute drive to my son’s house.

this is why I asked about removing backhoe and checking hoses/connectors earlier. this happening while operating backhoe to load onto trailer is odd for sure.

 

[dicktill]

Yes, I am aware of the flow order. I was commenting the the main control valve/3pt spool will override or disable the flow to the FEL and BH. I way I know this is I was working on my lower lawn which is a little wet are and got too close to the ditch and the front of the tractor slid down the ditch. I had my BH on so I was using that to lift and pull my tractor back out of the ditch. In process of doing this I turned in the seat to the right and was operating the BH with my right hand. All of a sudden I lost hydraulics to the BH and FEL. I thought I had blown my hydraulic pump. Turns out I had hit the 3pt lift handle with my right leg which moves the main control valve. Once I returned the handle to its detent I got my external hydraulics back.

That is what I thought had happened Sunday when the hydraulics stopped working, But a quick check ruled it out. I am now leaning towards the flow divider given my test this afternoon. I will keep you posted on what I find. Problem is I am running out of days. I leave to go to Florida for the winter in a couple of weeks and need to get my camper winterized, closed up, and the Massey fixed.

I am befuddled about this event! It makes no sense to me considering the way that the loader, backhoe, and 3-point valves are plumbed. Is there any chance that something else happened? (color me confused)

Dicktill,

Thanks. I had looked at your schematic of the hydraulics with loader and BH last night. Mine looks about the same but I was always under the impression that there was one pressure line to the BH from PB port and 2 return lines to the tank reservoir but looking at your schematic one line is a pressure line to the main control valve. I went to my local dealer and bought the “flow divider valve” they had in stock. I got to speak to a service person who has some familiarity with the GC2310 TLB. He told me those valve don’t go bad. He said the reason they had one in stock is probably because someone else thought they had a bad valve, ordered a replacement, and it wasn’t the problem. He said he would be looking at the hoses and coupling for the BH to be a problem. I bought their flow divider valve with the understanding I could bring it back if I didn’t install it. He said it was a head scratcher. I’ll let you know what I find when I get back to the tractor. 40 minute drive to my son’s house.

Back to my "befuddlement", etc.: You've had this stuff taken apart previously. I think you need to trace all your lines against the factory or my schematic to be sure something isn't plumbed wrong.

Not to be spending your money, but I think you said that the control valve was no longer available. Perhaps you should invest in this one: Pardon Our Interruption.... He's been selling this stuff for 20% or more off, so make him an offer. Although it is for a GC 1720, it should be useable at worst with a bit of tweaking of fittings and such.

edit: have no idea why it labeled my link "pardon our interruption" but it does get you to the correct eBay listing. Gotta love computers ...

 

[oldnslo]

If he is getting no flow to the loader valve or backhoe highly doubtful problem is either one of those valves. The OP needs to determine why there is no flow coming to the loader flow. Looking at schematic the priority flow control block is the only valve in that circuit but again not sure how that block is drilled or machined.

Agree priority failure is typically spring fatigue or breaks or priority orifice plugs both of which should have some effect on steering. Not a commonly reported failure.

 

[WranglerX]

Would seem to me and my limited knowledge of hydraulic that looking at the whole system is sort of blinding the OP and others.... Sort of seeing the forest and not the trees..... IF you take each implement as a individual and going on premise "Power" (P) into valve block is correct and "Power Beyond" (PB) is correct and "Tank" (T) is correct ALL FROM PREVIOUS CORRECT OPERATION then problem is with one individual valve block or Quick Connect (QC), either at offending implements operation or maybe for some reason the PB to P connection to offending implement control is at fault.... Maybe a simplistic approach, but no different than troubleshooting electrical circuits or fuel system problems or the silly a$$ control valve on lawn/garden irrigation system....

Also maybe OPs diagnostic of what problem is may be at fault or how problem is being presented...... Might to be time to backup and star over to what actually is the problem...

 

[slb04786]

Back to my "befuddlement", etc.: You've had this stuff taken apart previously. I think you need to trace all your lines against the factory or my schematic to be sure something isn't plumbed wrong.

Not to be spending your money, but I think you said that the control valve was no longer available. Perhaps you should invest in this one: Pardon Our Interruption.... He's been selling this stuff for 20% or more off, so make him an offer. Although it is for a GC 1720, it should be useable at worst with a bit of tweaking of fittings and such.

edit: have no idea why it labeled my link "pardon our interruption" but it does get you to the correct eBay listing. Gotta love computers ...

Thanks for posting that! I made him an offer, we will see if he bites

this is why I asked about removing backhoe and checking hoses/connectors earlier. this happening while operating backhoe to load onto trailer is odd for sure.

Dmacleo,
Thanks for replying. I have taken your and the service techs advice and disconnected the BH hoses completely. Still no hydraulic pressure to the aux port, just power steering. I have the main hydraulic valve assembly off right now. I have removed all the plugs, pressure relief valve, flow control valve, and main valve. I have blown everything out with my compressor. We will trudge forward.
Thanks,
Stan

 

[slb04786]

Back to my "befuddlement", etc.: You've had this stuff taken apart previously. I think you need to trace all your lines against the factory or my schematic to be sure something isn't plumbed wrong.

Not to be spending your money, but I think you said that the control valve was no longer available. Perhaps you should invest in this one: Pardon Our Interruption.... He's been selling this stuff for 20% or more off, so make him an offer. Although it is for a GC 1720, it should be useable at worst with a bit of tweaking of fittings and such.

edit: have no idea why it labeled my link "pardon our interruption" but it does get you to the correct eBay listing. Gotta love computers ...

I have checked all of my hose connections to the loader and BH and everything looks ok per you hydraulic schematic with the loader and BH attached. I have also disconnected the loader and BH hoses with no change in symptoms. Definitely a head scratcher.

 

[oldnslo]

The question still is where do you have flow? If you remove excess flow line from priority flow control which is the supply for loader, backhoe, and 3 point is there any flow out that line? If yes can you install a flow control - needle valve on that line and see if flow stops if you try and build pressure? If you get flow and pressure at that point move to the next valve or connection and repeat.

since same pump feeds Steering and implements we can kind of presume the pump is good so based on that where is the fluid going since if pump is turning oil is going somewhere.

It is not the main relief since steering works.

 

[slb04786]

The question still is where do you have flow? If you remove excess flow line from priority flow control which is the supply for loader, backhoe, and 3 point is there any flow out that line? If yes can you install a flow control - needle valve on that line and see if flow stops if you try and build pressure? If you get flow and pressure at that point move to the next valve or connection and repeat.

since same pump feeds Steering and implements we can kind of presume the pump is good so based on that where is the fluid going since if pump is turning oil is going somewhere.

It is not the main relief since steering works.

oldnslo,
The excess flow line is the manifold that sits at the top of the main control valve assembly. It is held down by 2 small long metric bolts (possibly 5mm) The manifold has two metal lines coming from it. They go out under your right foot to a block. Connected to them is one line that goes to the pressure port on the loader valve assembly, the other line goes to the T port on the loader valve which if I am correct and looking at the hydraulic schematic, that was provided by another member, is the transmission return line. If I remove that manifold I get no flow from the pressure line, which is the same if I remove the other end of the line at the pressure port of the loader valve. If I put a pressure gauge on the test port I get near zero( 100 psi maybe?) until I operate the steering wheel then it jumps to 1200 psi. I have a long hydraulic hose that has a slow drip. I am thinking next time I am onsite I might try putting it on the power steering source port, run it under the tractor and plumb it into the loader pressure port and see what I get for pressure and see if the loader valves are working ok. If that works I'll try connecting the BH up and see if that all works ok.

At this time I did buy a used Main Hydraulic Control Valve Assembly (I think you sent me the link) for $400 plus tax. I was hoping it would be here by Set 25th but the tracking I got says Sept 26th which isn"t good for me. We are getting our camper ready to move to a new campground and the gentleman moving it says he might want to move it Friday Sept 26th. Anyhow, I do have the main hydraulic control assembly off the tractor so I may need to put it back on this weekend to 1)See if I fixed the problem by removing it and disassembling and cleaning every port and device attached to it or 2)Try connecting a hose the the power steering port and loader valve to see if I get get some pressure to the loader and test the loader that way. Does all that make sense?

Oh, and I did put a brand new flow divider valve on the main hydraulic assembly and it did not resolve the issue.

Thanks for listening to me!

 

[slb04786]

I've read this whole thread trying to learn something. I have absolutely no understanding of hydraulics other than a simple valve that will move a cylinder back and forth. Just want to relate a problem I had with no movement on a post hole auger on my GC2610. It was working fine and just quit. Just by luck, after a few minutes of looking stupid trying to figure out a problem I knew nothing about, I discovered that one of the couplers wasn't properly connected. It wouldn't come apart, but wasn't fully seated. Didn't know this was possible and neither did two other neighbours who have much more experience with equipment than I do. I felt very lucky finding this without taking it to a repair shop.

Good post. I don't know much about hydraulics and pressure but I am learning as I go. I was hoping this was going to be my issue after speaking with a service tech at a local dealer. But of course no such luck. He suggested the BH connections because it was the last hydraulic valve that was operated before it quit. Still trudging along. Stay with me and maybe we will both learn something.