PCABE5 said:
2Malamutes,
I was looking today for about an hour thru JD parts and I could not find a diverter valve listed except for the power beyond kit. Do you actually see one on your tractor, if so point me in that direction? I was looking and have not found it yet.
Page 368 of the tech manual has the parts breakdown for the "Divider Valve", and page 352 of the tech manual shows the location of the "Divider Valve" in the stock hydraulic system. It is hard for me to know what you are looking at as I don't have what you are looking at from your dealer, but ask him to pull out his tech manual for the 2320 and look at the pages I've referenced here, and maybe you'll understand where I'm coming from better.
PCABE5 said:
If you look at just what you can pull off line (attached) is a schematic of the steering lines and they do not show a diverter valve in there, nor is it coming off the implement pump (attached).
But if you look at the system as a whole, not just sub assemblies, the diverter valve appears in the schematics as well as the parts breakdowns similar to what you posted.
PCABE5 said:
Now my friend at JD just called me and he said that the 2520 has two Kanzaki 4.9 cu/in implement pumps. So this must be the "two" pumps that is talked about.
But he also said the 2320 implement pump runs the rcv and scv only, he said try driving and steering while loading and you should see no effect on the loader but try and run the 3pt and loader at the same time and one will time out until the other is done, rcv priority over scv.
I don't mean to step on any toes, but it sounds like he doesn't have a real good grasp of what a proportioning valve does. The pump output is fixed at 5.6 GPM, and the proportioning valve ratio is fixed at 60/40, so it doesn't matter if you are using the circuit attached to the 60% side, it has no affect on the 40% side (which is its own open center circuit), which is why what he said is true with respect to steering having no affect on rcv/scv, but the reason is not two pumps, it is because there are two separate open center circuits created by the divider valve (which would emulate a two pump system in some respects so I can understand his explanation, although I think it is wrong.) As the schematic I posted shows, there is no secondary proportioning valve for the rcv/scv which is why they (rcv/scv)
would function as he says since they both are open center valves operating within a common open center circuit.
At this point I've done enough research to believe that my tech manual is accurate as it agrees with everything I'm seeing on the tractor. This text is on page 374:
"The hydraulic pump draws hydraulic oil from the transaxle
case, through the filter,
then supplies a constant flow of oil
to the divider valve, which diverts 40 percent to the steering
control unit and the remaining 60 percent to the rockshaft
control valve and selective control valve.
Return oil from the steering control unit is routed through
the oil cooler then back to the transaxle case."
As well as this text on page 414:
"Pressure oil comes into the steering valve body at the inlet
port
from the divider valve. The steering relief valve
regulates the oil pressure to 6,412 +490/-0 kPa (930 +71/-0
psi). The oil then flows through inlet passage to a series of
passages, and slots in the valve body and then on to the oil
cooler. The amount of oil that flows this way varies with the
speed of the turn."
I hope the above is concise enough without seeming like I'm trying to be too matter of fact, I'm just trying to explain to you in technical terms what I am seeing, and why what your dealer is saying just doesn't make sense with anything in the tech manual.
