| power steering pressure relief valve [message #221705] |
Sun, 08 September 2013 20:19  |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Does anyone know what the stock power steering valve specs are?
I mean number of shims in the pressure relieve valve and or the fittings orifice diameter?
And anything else that the PO could have changed...
Just trying to return my power steering to stock.
Thanks
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: power steering pressure relief valve [message #221769 is a reply to message #221705] |
Mon, 09 September 2013 12:14  |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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| Keith V wrote on Sun, 08 September 2013 20:19 |
Does anyone know what the stock power steering valve specs are?
I mean number of shims in the pressure relieve valve and or the fittings orifice diameter?
And anything else that the PO could have changed...
Just trying to return my power steering to stock.
Thanks
|
anyone?
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: power steering pressure relief valve [message #221794 is a reply to message #221769] |
Mon, 09 September 2013 16:13 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Sir: the ones I haven taken apart had either 1 or 2 shims mostly 2. Removing shims raises pressure.
| Keith V wrote on Mon, 09 September 2013 13:14 |
| Keith V wrote on Sun, 08 September 2013 20:19 |
Does anyone know what the stock power steering valve specs are?
I mean number of shims in the pressure relieve valve and or the fittings orifice diameter?
And anything else that the PO could have changed...
Just trying to return my power steering to stock.
Thanks
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anyone?
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C. Boyd
76 Crestmont
East Tennessee
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| Re: power steering pressure relief valve [message #221804 is a reply to message #221794] |
Mon, 09 September 2013 16:38 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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Thanks for the shim count Sir, there is 1 shim in my valve.
Hal,
The reason for this is to make my steering as perfect as possible.
I know the pump on the coach had been replaced at least once, so I don't know if it's valving is correct.
Also It seems to have somewhat heavy steering compared to other coaches I've driven. So something must be different.
So far I have;
Adjusted the steering box per the FSM
Adjusted the camber and caster, only 1.5' caster.
replaced the pump using the valving that was on the current pump which was the same as was on the new pump anyway.
It is better than it was, but I like things perfect and am willing to work at it till they are.
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: power steering pressure relief valve [message #221811 is a reply to message #221804] |
Mon, 09 September 2013 16:51 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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I kinda have the same issue. After rebuilding stuff a few times my steering was tighter, drives good but a little tighter than I would like to have. The only thing I can contribute it to is maybe the high pressure hose I had made at Royal Brass. Fits great but I don`t think it is the same id.
| Keith V wrote on Mon, 09 September 2013 17:38 |
Thanks for the shim count Sir, there is 1 shim in my valve.
Hal,
The reason for this is to make my steering as perfect as possible.
I know the pump on the coach had been replaced at least once, so I don't know if it's valving is correct.
Also It seems to have somewhat heavy steering compared to other coaches I've driven. So something must be different.
So far I have;
Adjusted the steering box per the FSM
Adjusted the camber and caster, only 1.5' caster.
replaced the pump using the valving that was on the current pump which was the same as was on the new pump anyway.
It is better than it was, but I like things perfect and am willing to work at it till they are.
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C. Boyd
76 Crestmont
East Tennessee
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| Re: power steering pressure relief valve [message #221894 is a reply to message #221854] |
Tue, 10 September 2013 09:22 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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interesting but not a lot of help as it doesn't list the GMC and I doubt the steering box has been changed.
Also the power steering flow orifice also controls on center feel.
I did find some rock crawler guys that increase the valve size so they can steer their trucks over the rocks with 33inch mudders...
So my goal now is to determine the correct orifice diameter, the one I have has a .128" orifice..
The rock crawler guys say the max is 5/32 or .156. But they also say that size is scary sensitive on the highway...
One idea is to open it way up then use a heidts adjustable flow restrictor to adjust it, but that flow valve is made for light little street rods and it may be too restrictive at any setting.
I wonder if Jim Shea has any information on this?
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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