460 Diesel Hydraulic flow description

I have a Farmall IH 460 Diesel. I'm still having difficulties with my Hydra Touch 2 point lift system and the remote hydraulic lines as well. I think it will help for me to understand where the flow goes from beginning when it leaves the pump, until it dumps back into the reservoir.
I would like to know the fluid path in the hydra touch system when the control lever is put in the lift position, the lowering position and while in a low pressure bypass mode as well. I'm not sure if my problem is in the check valve or in the Pressure, Safety Valve and I've had both valves apart, inspected and replaced some o-rings. Its getting frustrating.
I do have 2 manuals on the hydraulics system and valves for my tractor and I normally have a good understanding of flow and pressures but this is eatin' my lunch.
I will re-post my hydraulics issues after we address the flow direction.
Thanks for any and all help.

See if the link below might help.

Pete
460 hydraulics

Re reading that link made me wonder about the Tele depth valve?? On the opperator side mine has no place to set one or 2 way use? Can this valve with handle also be used as a remote?? Bud and Stinky.

Hi Pete7, I have read the story in the link you suggested. I actually read it again and realized that my question / request for a flow description is to vague. What I am asking is where the fluid goes when it leaves the pump. Just simply, not each port or every turn but just simply from each part to the next.

Example, from pump to pressure relief, safety valve to .......

NOTE: If possible, I would like to understand if the flow direction changes when the control lever is moved from up, down and after a desired position is reached and low pressure state is achieved. I realize the flow will change inside the pressure relief, safety valve itself and that does not need to be mentioned. Only an explanation of flow from one component to the next in each control lever position.
Thanks, Tod.

I would get a hold of a 300 400 hydraulic service manual. It does the very best description of that hydraulic system. All the later manuals for 460 etc do not detail the flow. When I was a youngster just starting to work on these tractors, I read the manuals during lunch break as I was living out on the farm at the time and did not go home for lunch(dinner). It is actally a closed center valve on there. When all valves are in neutral the flow it to the reglator valve. Flow through the orfice screen forces the regulator piston down onto the unloading ball and seat and dumps the fluid right back into reservoir at a low pressure of maybe 30 to 60 psi. No flow is going through any aux valves. When you operate any aux valve, you first uncover the port to the orfice screen, much more oil flows through that port than can go through the orfice so the regular piston moves up allowing ball to seat and flow is directed to out port of aux valve to work port. Other work port is internally connected to reservoir for return oil. The fluid is still ported to the relief valve in regulator block assembly so if work port is blocked the fluid opens relief valve and dumps to reservoir. When you switch valve to single action, the land over regulator port to orfice always remains blocked when aux valve is operated in drop position therefore the regulator valve keeps on dumping oil. The teledepth valve is same basic valve as the rest except it has follow up linkage that return it to the neutral position through a differential type gear and lever arrangement. Now, clear as mud right, but I am a mechanic not a manual writer. Hopes this helps some. But, the 300 manual is good.

That's What I was looking for Pete23. And yes, clear as mud, well put.
I suspect I have an issue with my check valve. I have a surging going on most all the time, when it surges the pressure builds up quickly and makes a kind of growl noise. When it dies this I can feel that growl in the hydraulic line and also the two steel lines that go under the seat back to the check valve. I just replaced the o-ring in the check valve in the last week. My plan is to inspect the check valve and the safety valve tomorrow to see if there are any signs of issues.
Do you have any suggestions or insight?
Thanks Pete23,
Tod

Hi Bud Delong, I'm certainly NOT an expert on the issue but I had a few thoughts about your question. The spool valve for the Tele-depth system should not be used for a remote set up because it needs feedback from a follow up linkage to put the system back in a low pressure bypass mode.
Not sure if this answers your question or not but thought I would offer an answer for you.
Tod.

Hi Pete23, I wanted to let you know what happened. As I mentioned earlier, I removed and inspected the pressure relief safety valve and also the check valve today and when I first started up, it seemed to make the same surge noises, but after running the lift up and down several times it seems to have straightened out. I will let you know more about that after I run it for a while.
I DO HAVE ANOTHER QUESTION for you or anyone who may have done this. I'm having problems with my power steering(PS) and need to do some testing. I've been told to put a shut off valve in the pressure line and I see no way to do this without cutting the steel line. My question is, after I cut this steel line will a normal compression fitting hold the pressure that the PS pump puts out? If not, what else can I do to install the test valve so I can test the pump?
Thank again,
Tod.

The front of the steering lines are connected with flare fittings. You can splice into the lines up there.

My question that I ask about the flow description was answered. Thank you to all the replies.
Tod.
Untitled URL Link

The teledepth valve cannot be used as a regular remote and cannot be used as single action. It requires follow up linkage to return it to the neutral position.