Update 7/17/24: Well, this is overdue but I have been busy catching up on other things that slipped while working on the tractor.
First I want to thank oldnslo and dicktill for educating me on the hydraulics plumbing on the GC2310. I was wrong in my assumptions that the "manifold" that sits on top of the main hydraulics control valve has 2 pressure lines coming off from it. The 2 metal tubed lines are 1 pressure line and the other is a return line from the backhoe or power beyond port. The pressure for the backhoe operation comes from power beyond port that is on the side of the loader control valve. So, if you have loader pressure you should have backhoe or power beyond pressure. If not you probably have issues in the loader valve or a hose connection issue like me. Armed with that knowledge I was able to determine the backhoe hoses had been swapped. I asked my son about it and he claims he didn't unhook the hoses but there is no way the backhoe would work plumbed the way it was. The hose that is supposed to be on the T3 (tank return) port of the loader valve was on the power beyond port (essentially rendering it useless) and the hose that was supposed to be on the T3 port was on the power beyond port. Once I hooked them up correctly I was in business with the loader. I did replace the (4) o-rings on the loader spools as they started leaking within a couple of days of getting the pump installed and the loader operational. I bought a kit of various size metric o-rings on Amazon and used (4) 18x13.3x2.4 mm rings. They fit nicely and so far, no leaks. Time will tell if they hold up. They were a lot less expensive than buying them from the dealer. I have 46 left and they aren't to difficult to replace. I hope my experience here will help educate someone else who may be in the same situation.
So, to recap, here is what I learned:
1. If you lose the main hydraulic pump you lose everything. No PS, not loader, no backhoe, no HST, no 3pt lift, no PTO. If you are in 4WD when the pump quits you can move the tractor as long as you don't shift it out of 4WD
2. The pressure for the backhoe comes off the power beyond sleeve on the side of the loader valve.
3. Loader o-rings are 18x13.3x2.4mm in size.
Thanks
Stan
First I want to thank oldnslo and dicktill for educating me on the hydraulics plumbing on the GC2310. I was wrong in my assumptions that the "manifold" that sits on top of the main hydraulics control valve has 2 pressure lines coming off from it. The 2 metal tubed lines are 1 pressure line and the other is a return line from the backhoe or power beyond port. The pressure for the backhoe operation comes from power beyond port that is on the side of the loader control valve. So, if you have loader pressure you should have backhoe or power beyond pressure. If not you probably have issues in the loader valve or a hose connection issue like me. Armed with that knowledge I was able to determine the backhoe hoses had been swapped. I asked my son about it and he claims he didn't unhook the hoses but there is no way the backhoe would work plumbed the way it was. The hose that is supposed to be on the T3 (tank return) port of the loader valve was on the power beyond port (essentially rendering it useless) and the hose that was supposed to be on the T3 port was on the power beyond port. Once I hooked them up correctly I was in business with the loader. I did replace the (4) o-rings on the loader spools as they started leaking within a couple of days of getting the pump installed and the loader operational. I bought a kit of various size metric o-rings on Amazon and used (4) 18x13.3x2.4 mm rings. They fit nicely and so far, no leaks. Time will tell if they hold up. They were a lot less expensive than buying them from the dealer. I have 46 left and they aren't to difficult to replace. I hope my experience here will help educate someone else who may be in the same situation.
So, to recap, here is what I learned:
1. If you lose the main hydraulic pump you lose everything. No PS, not loader, no backhoe, no HST, no 3pt lift, no PTO. If you are in 4WD when the pump quits you can move the tractor as long as you don't shift it out of 4WD
2. The pressure for the backhoe comes off the power beyond sleeve on the side of the loader valve.
3. Loader o-rings are 18x13.3x2.4mm in size.
Thanks
Stan
