Labman98, Re: 450 hydraulic plug

I just received my PS plug for the PS valve. It was not packaged in an IH wrapping.

I can take measurements with my digital vernier calipers and post them here or I can have a machine shop make a bunch of the plugs. I can stop by the machine shop tomorrow and get a quote. Let me know what you want to do.

Not sure if D Slater's pipe plug will work but then he has a much better understanding of the system than I do. The largest diameter of the plug slip fits into the third bore of a non PS service valve. It appears to float like a shuttle valve shuttle. Not sure if the third hole in a PS valve has a counterbore to lock it in place.

The seller I purchased the plug from may already be reproducing them. If so, I would imagine he has another already listed. I haven't seen it though. You could email him through eBay.

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I just got my control valve off and i DO have one installed already!!!!!! It is in the "#3 hole" as well. That opens a whole other bag of worms because I was hoping that was the problem. Now I'm getting stumped. I ordered a manual for the hydra-touch system itself, which should help. But now I'm leaning toward the regualtor / safety valve. Any ideas?? Also Wardner thank you for the offer. That may be worth getting a few extra made and sell them though.

What should the idle psi pressure be when hooked up to the PS pressure line before the pump? I am getting nothing unless I pull a lever. I have a PS manual and it says the PS should work at 650psi. But I have also read somewhere where the regulator will hold 30-60 psi. That doesn't sound right to me though.

Wardner, have installed some with no problems using a allen head plug. When the regulator and control valves are off I just tap the support post. The passage can be cleaned with both off.
When I once told another person how to block the passage without the factory plug. He said can't I just tap the control valve passage. Can be cleaned without removing the regulator if already installed. That was one of those moments when I think why didn't I think of that. Must have worked, never heard back.

You might check the safety regulator valve.
Scroll down to my previous reply.
http://ytforums.ytmag.com/viewtopic.php?t=813167&amp;highlight=

The 30 to 60 psi they are referring to is the standby regulated pressure of the main system when in neutral. It may or may not run in that range but is not really important and long as it is below 100 psi. It is checked at the test port on left side of the regulator valve assembly. It is controlled by the regulator piston from the flow through the screened orfice in regulator valve . I feel you have flow divider valve problems if that plug you are talking about has a 0-ring on it and is sealing good. Those flow dividers are notorious for wearing the land on the spool. The spool cost about 80 dollars a few years ago. They unfortnately also wear the bore sometimes and with age a good percentage of them will be worn. If you haven't had the flow divider spool out you need to do so and take a look at it. Make sure spool is in the correct way also by referring to parts book. I don't think the regular service manual shows it. There is also a ball type relief valve for power steering that can be taken apart. It is a seperate relief valve from the main relief (safety) valve. The steering flow divider circuit should produce 1200 psi when reading directly at the outlet to power steering unit with hose off and gauge dead heading the circuit. The flow divider block can be rebuilt but it is expensive and I don't know the machine shop that does this but it has been addressed on here before.

I did take the flow control valve out and it is worn. The bore is worn also. I'm going to try and hone it and make an oversize valve. Hopefully that will give me some sort of results. Will keep you posted.

When I took mine apart, I found a plug in the support post and a plug in the valve. I guess they ment business!! It almost looks like the plug in the valve partly blocks an inner passage within the valve. and not just the outer hole. Is that so?