Power steering lines help
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So I replaced the steering gear and the pump. Im in the process of reconnecting everything and I am having issues with the steering lines.
From the service manual—the line on outside closest to column will go to nipple on back of steering pump. And the other hard line with pressed fittings will go to the threaded portion of pump. Does this sound correct? |
Re: Power steering lines help
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These pictures may help.
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If I recall correctly, they are different sizes. I remember having to use 2 different wrenches on mine.
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I was using those photos as reference. After I looked, there were spacers on my pump. Once I took those out and put the O-ring in it was fine. I think I still have air in the system because it makes a whining noise when applying turns. Good note the steering is a lot tighter with the new box and rag joint. Now just figuring out the whining.
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An update
Been driving for a bit and it still whines. I have attempted to bleed the power steering a few times to no avail. I’m new to the c10/c20 platform. So with the lines. I understand there is a low and high pressure line. The steering gear is a oem replacement for a 72 c20. To my knowledge everything is correct. Which lines require an o-ring? Is one also required on the back of the steering pump? I’ve been driving it for a week with no leaks but there is still air in the system and it still gets foamy when I bleed the system but starting engine and turning lock to lock. Also the whine is more Noticeable when turn the wheel left vs right. Thanks for any help of info you can give. |
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Im following this thread. Im soon to be replacing my gear box.
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Try jacking the front of the truck in the air, both wheels off the ground if you have not done so....turn the wheel lock to lock 10 times with the engine running.
I had to do it twice over the course of a week to get it to purge all the air out. |
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My question is—why won’t it purge the air during normal driving though. Since there is t a bleeder valve like the brakes have. |
Re: Power steering lines help
You only need O-ring fittings on the pressure hose id the pump and/or box have been replaced with newer parts that use O-ring fittings. This has nothing to do with hard turning.
The two I've done (both rebuilt pump, box and new lines) I just filled the res, went lock to lock a few times, then topped off the res. The high pressure fitting on the box is a different size than the low pressure, and the low pressure at the pump uses a clamp. Hard to mismatch things. |
Re: Power steering lines help
Hmmm wonder what the problem could be then. The pump was a new pump as well as the box. And when I ordered the parts the ones I replaced matched what I removed.
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Re: Power steering lines help
Did you put the valve back in the pump out of the old one are use the newer one? This could be your problem. You need the valve for these model trucks and it needs to be put in correctly also.
The lines only can be hooked up one way.:chevy: |
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This is the pump I swapped in. Also got the steering gear from summit. https://www.napaonline.com/en/p/PNB3...rdInput=381215 https://www.summitracing.com/parts/AAZ-27-7501 |
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Last night I did it. Jacked it up. Started engine. Turned wheel three or four times both directions. Reservoir filled with foam. Let it settle. Did it again. Did that three of four times in total. The belt is tight too. Maybe I have a bad pump or something. Or air is leaking in a line somewhere but if that’s the case it doesn’t explain why it is not Leaking. |
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Your experience is the same as mine. When i put in a crate motor over the winter i dumped out the PS fluid and put in new lines while i was at it. The old pump worked fine so i used it. Even after the lock to lock routine i still had foam and whining noise. I've put about 400 miles on it now and it is getting quieter and no more foam. I'm keeping an eye on it, just in case, but it seems to be working fine.
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Take the line out then back the nut off. Be carefull it's spring loaded. That is the valave that comes out. Make sure it goes back in the same way it comes out.:chevy: http://67-72chevytrucks.com/vboard/s...d.php?t=695412 |
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Popeye from the hard steering. Lol |
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I was watching a video on youtube where a shop was installing a hydroboost system on a truck. He claimed that a small amount of dextron mixed with power steering fluid got rid of the foaming he was always running into. He explained that power steering fluid had no anti-foaming agents in it, but the dextron ATF did. I refilled my power steering unit with dextron atf when I put in my new motor. Everything works great from day one.
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