Posted 2019-05-04 10:23 AM (#581750) Subject: Constant control steering pump pressure
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).
Posted 2019-05-04 12:51 PM (#581759 - in reply to #581750) Subject: Re: Constant control steering pump pressure
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
Posted 2019-05-04 1:02 PM (#581761 - in reply to #581750) Subject: Re: Constant control steering pump pressure
Board Moderator & Exner Expert 10K+
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"