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PS Steering Pump Whines After Hi-ratio Upgrade


airfido
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Same issue on my 72 Mach. Box rebuilt by PS.com, (no quick ratio install), and pump started whining. Had PS.com rebuild pump and it still whines. Marty refunded my $ for the pump rebuild and said he couldn’t help me. I’ve since installed 3 rebuilt pumps and a new (not restored) pump. All whine. Did the 25+ lock to lock wheels up and down to purge air. Also same while system under 15mm vacuum at the refill tube. Still whines. No foam, no leaks. Cold weather startup had diminished whine but whine returns when system is at operational temp. Also tried vacuum refill/purge while at op temp. No air in system at op temp pulling ATF sample from operating pump. Been at this riddle for 1.5 years now. Using new Ford ATF only. Anyone need a spare P/S pump? I have 3. 
Frustrating. May be trying a thicker oil next???

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And I also replaced both hoses and flushed out the P/S cooler. In case you are looking for a replacement “S” tube for the P/S pump, National Parts Depot is offering a reproduction that’s perfect.

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I could well be wrong, but there seems to be a theme here, PS.com rebuilds. As I've posted many times, I'm NOT an expert rebuilder by a long shot, but because of a bad experience with a so called pro rebuilder, I learned, with the help of a couple of our knowledgeable members and good old YouTube along with the much appreciated help of PS system rebuilder in Ohio, to do my own PS boxes. The pump was the only thing my original rebuilder did right as it runs perfectly, no whine or nasty noises. I just don't see 3 pumps all whining. 1 maybe, 2 possible, but 3 that would be shear bad luck. 

My mind keeps coming back to possible excess pressure needed to force the ATF through the PS box. The only part I can think of that might, repeat might, cause that is the check valve not installed correctly or sticking. Other than that, could it be the preloads way too high requiring more effort to turn the wheels. These are just MY thoughts on it. I just don't see so many pumps being the sole cause.

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Edited by Stanglover

Geoff.

 I learn something new every day!

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1 hour ago, Retired2014 said:

Where did that instruction sheet come from? Is it part of a rebuild kit?

No, it was included with an NOS set of brass seats I got, which are like hen's teeth to find.

If you need info on extracting seats, I've posted on that before, or I can go over it again.

I stress, I have no real clue as to why all these pumps a whining like crazy, I'm merely using my "logic" and basic knowledge of the workings of PS boxes.

Geoff.

 I learn something new every day!

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23 hours ago, Stanglover said:

The pump was the only thing my original rebuilder did right as it runs perfectly, no whine or nasty noises. I just don't see 3 pumps all whining. 1 maybe, 2 possible, but 3 that would be shear bad luck. 

Just curious, who was your original rebuilder for the pump?

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After refunding for the rebuild, Marty sent me a return authorization for the pump so he can analyze the issue. He suspects a bearing, and wants to figure this out as much as we do.

For the record, I replaced the pressure hose when I put the “New” reproduction (made in China) pump on. There is an ever-so-quiet whisper of a whine under a load, but I find that to be normal for most automobiles, and nothing like the deafening complaint the old Pump made even at idle.

JB

PS: New pony in the stable:

 

DA779962-364B-4745-9E42-73400A99AE8C.jpeg

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  • 4 weeks later...

Just a note of similar flushing of system you need to do. If you have your automatic transmission rebuilt for sure you need to flush the cooling lines and cooler either in the radiator or stand alone. I have a friend that had a Hummer, transmission went out when he was in Florida and he had some shop there take out and rebuild. GM actually suggest you replace the radiator not just flush it. They didn't and it lasted 90 miles so another roll back bill and built again. He took straight to car lot and traded for a Dodge, lol.

When a man is in the woods and talks and no women are there is he still wrong??:P

David

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I had a bad experience with Lee Steering rebuilding my steering pump. The rebuilt was okay but the pump housing was distorted and it leaked. Then they went out of business so couldn't return it. Eventually i had to buy a rebuilt pump just to use the housing. I wanted to keep the rebuilt pump by Lee since he had upgraded the preasure or whatever he did. That said, I think they do a good job rebuilding but not necessarily check the components they reused. Since then i replaced the pump with a Saginaw so if anyone is interested on the Ford rebuilt pump i have it available.

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1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump

Strange center section with Truetrac, 3.5 gear and 31 spline axles, 4-wheel disc brakes

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Plus one on flushing transmissions, a.c., power steering, block, and anything else that has fluids and a part breaks or wears out. On automatic transmissions don't even try to flush the converter, not possible to get metal shavings and gunk out of the impellers, etc. Converters must be replaced.

Edited by Don C

 

 

“If you can't explain it simply, you don't understand it well enough.”

--Albert Einstein

 

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UPDATE:  Marty, at power steering.com, refunded the cost of my rebuild, and sent me a return label for the unit. He analyzed the issue and found the bearings were fine, he DID find the staked control valve cap to be loose. He restaked the cap, refinished the exterior, tested the unit and sent it back to me.

FWIW, I did not have the heart to cash his refund check. He stood behind his work, and that’s all we can ask. Here are the pics.

1 last symptom observation: The old pressure hose felt like it was buzzing (and I mean a high-energy, high frequency buzz) when the car was running. If this is your symptom, maybe it’s the control valve cap. 

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That's great news, glad it was sorted out and Marty stood behind his work. I agree, I wouldn't cash the check either. Hopefully all will be good in the world from now on.

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Geoff.

 I learn something new every day!

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Tell Marty that you're not cashing the refund check.  I have customers from 8 months ago that still haven't cashed a small check and it drives me crazy trying to balance the checking account.

Let me check your shorts!

http://midlifeharness.com

cactus.jpg.92e5d9d8700abc0ed60c8ccb3426248e.jpg

 

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