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03-12-2020, 03:24 PM | #1 |
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Location: Aiea,HI
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Power steering lines help
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? |
03-12-2020, 05:56 PM | #2 |
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Re: Power steering lines help
These pictures may help.
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Jim Last edited by FirstOwner69; 03-12-2020 at 06:05 PM. |
03-12-2020, 06:26 PM | #3 |
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Re: Power steering lines help
If I recall correctly, they are different sizes. I remember having to use 2 different wrenches on mine.
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
03-12-2020, 06:54 PM | #4 |
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Re: Power steering lines help
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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03-23-2020, 06:55 PM | #5 |
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Re: Power steering lines help
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. |
03-23-2020, 07:45 PM | #6 |
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Re: Power steering lines help
Im following this thread. Im soon to be replacing my gear box.
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1971 Chevrolet C20, Blueprint 355. Holly Street Avenger 430HP. Turbo 350 1952 Chevrolet Deluxe. Stock. True survivor with 1 paint job 1953 Buick Special. GM 355. Just a good smooth engine. |
03-23-2020, 07:55 PM | #7 |
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Re: Power steering lines help
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. |
03-23-2020, 08:32 PM | #8 | |
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Re: Power steering lines help
Quote:
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. |
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03-23-2020, 09:42 PM | #9 |
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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. |
03-23-2020, 09:57 PM | #10 |
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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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03-23-2020, 09:59 PM | #11 |
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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.
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
03-23-2020, 10:04 PM | #12 | |
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Re: Power steering lines help
Quote:
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 Last edited by Wobpb377; 03-23-2020 at 10:18 PM. |
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03-23-2020, 10:41 PM | #13 | |
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Re: Power steering lines help
Quote:
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03-23-2020, 10:48 PM | #14 | |
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Re: Power steering lines help
Quote:
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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03-23-2020, 10:49 PM | #15 |
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Join Date: Jul 2014
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Re: Power steering lines help
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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03-23-2020, 10:50 PM | #16 | |
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Re: Power steering lines help
Quote:
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. http://67-72chevytrucks.com/vboard/s...d.php?t=695412
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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03-23-2020, 10:51 PM | #17 | |
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Re: Power steering lines help
Quote:
Popeye from the hard steering. Lol |
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03-23-2020, 10:52 PM | #18 | |
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Re: Power steering lines help
Quote:
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03-23-2020, 10:55 PM | #19 |
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Re: Power steering lines help
Yes read the link I posted.
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
03-23-2020, 11:24 PM | #20 |
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Join Date: Mar 2005
Location: Jurupa Valley, Ca
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Re: Power steering lines help
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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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
03-23-2020, 11:56 PM | #21 |
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Re: Power steering lines help
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03-24-2020, 10:31 PM | #22 |
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Re: Power steering lines help
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