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Constant control steering pump pressure
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Chrome58
Posted 2019-05-04 10:23 AM (#581750)
Subject: Constant control steering pump pressure



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Location: Belgium, 40 miles south of Brussels
Was there a change in operating pressure inside the Constant control steering box during the years it was produced ?
I bought a rebuilt power steering box, and it was a later version ('60 to '62 I think).

I've had noise and hard spots problems since the start, and I'm wondering if the pressure needed by the box could be higher than what the pump provides (the pump being an OEM '58).
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59 in Calif
Posted 2019-05-04 12:51 PM (#581759 - in reply to #581750)
Subject: Re: Constant control steering pump pressure


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Location: Hayward, Calif
This hard spot thing kinda sounds like the pressure relief valve in the pump could be momentarly sticking. The pump will only put out as much press as the relief valve will allow. If you put a high pressure gauge and a shut off valve between the pump ( pressure side ) and the gear box, you can see what press the pump is putting out. you will need another hose from the shut off valve to the gear box so as to make a loop in the sys. Gradually close the valve and see what press the gauge is showing. The gauge should have a capacity of around 2000PSI. You will probably get about a 1000 psi. As I remember the gear box is rated for no more than about 850 - 900 psi. I found on 59 Dodge the gear box only asked for about 200 psi to easily turn wheels from side to side, sitting still in the shop. The pump press relief valve press can be adjusted by removing the valve, changing the spring or by adding washers under the spring. Then recheck press each time you adjust the press relief valve. This can get a little messy, but then you will know what your are dealing with. Good luck, Jerry
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59 in Calif
Posted 2019-05-04 12:57 PM (#581760 - in reply to #581750)
Subject: Re: Constant control steering pump pressure


Elite Veteran

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Location: Hayward, Calif
Almost forgot, pump press should be lower than the max press the gearbox is rated for or the gear box will start blowing seals. I found this out the hard way. Jerry
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wizard
Posted 2019-05-04 1:02 PM (#581761 - in reply to #581750)
Subject: Re: Constant control steering pump pressure



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Location: Southern Sweden - Sturkö island
Vincent, I had similar problems with a "homemade" power steering pressure hose. There was sounds from the pump and hard spots while turning the steering wheel. I tried to add a restrictor in the hose, but it didn't help.


Fortunately, my original hose was still ok, so I changed back to the original hose and, presto - all problems gone.


Since then I bought a spare hose from Edelmann and understood that the fault is in too hard hose;


"Double piles of high-tensile strength braided fabric help to withstand pulsation pressures up to 1,500 psi and bursting pressures up to 8,900 psi"


This might be the root problem you have.
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Chrome58
Posted 2019-05-04 2:15 PM (#581765 - in reply to #581750)
Subject: Re: Constant control steering pump pressure



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Location: Belgium, 40 miles south of Brussels
I don't think Sven, the pressure hose is OEM style with the correct restrictor in the middle.
It was a NORS one if I remember well.

It's part of my original problem, still unsolved, that we started to discuss here : http://www.forwardlook.net/forums/forums/thread-view.asp?tid=65701&...
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mikes2nd
Posted 2019-05-04 7:17 PM (#581782 - in reply to #581750)
Subject: Re: Constant control steering pump pressure


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this has tons of info

https://youtu.be/QUZoxulsiMA

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Chrome58
Posted 2019-05-05 2:52 AM (#581793 - in reply to #581782)
Subject: Re: Constant control steering pump pressure



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Posts: 1230
100010010025
Location: Belgium, 40 miles south of Brussels
mikes2nd - 2019-05-05 1:17 AM

this has tons of info

https://youtu.be/QUZoxulsiMA


Thanks !
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