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  Mustangsandmore Forum Archive
  '64 1/2 to '68 1/2 -- The Classic Mustang
  Power Steering pump problem

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Author Topic:   Power Steering pump problem
460-67Stang
Gearhead

Posts: 296
From: Idaho, USA
Registered: Feb 2001

posted 09-10-2002 02:05 PM     Click Here to See the Profile for 460-67Stang        Reply w/Quote
I just installed a new power steering pump. It's the older, canister style...1968 to be specific. I filled it up, started the engine and turned the steering left and right several times to get any air out of the system. All seemed to be working fine.

Drove the car for about 1 hour when the pump started whining and steering became slightly more difficult. Got home and opened the hood to see that fluid had come out the filler tube all over the place.

Next day - Filled the pump to full, started car, no whine at all, steering fine. One hour into a drive the pump started whining again with fluid spitting past the filler cap. This happens each time I drive for 1 hour or more.

I am running Power Steering fluid, not Transmission fluid as the pump dipstick calls for (didn't see this till I had filled it with PS fluid). Does it matter? Could the PS fluid be foaming or something whereas the tranny fluid might not?


Help!?

Brian

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Pierre
Gearhead

Posts: 661
From: Near Paris, France
Registered: Apr 2002

posted 09-11-2002 05:38 AM     Click Here to See the Profile for Pierre        Reply w/Quote
Brian,

I fought the same issue for almost 2 years....
If all the components of your system are operating properly the problem is fluid temperature so here is what I recommend based on my experience:

1 - TYPE F transmission fluid ONLY !!!! The fluid you are using now is good for today's PS technology not for our design (which date back to the late 50's)and probably makes matters worse. DO NOT overfill and fill very slowly when fluid in hot only (expanded)as this will also create the same problem
2 - This done, I still experienced the same problem when reving the engine high or in hot weather situations.
3 - I eventually cured it by installing a radiator (in front of main rad) in the return circuit of the PS.
BTW: Some 69 and 70 came out with a PS rad from factory
Just my 2 euros !
Hope this helps

mellowyellow
Gearhead

Posts: 8198
From: So. Fl.
Registered: Aug 2000

posted 09-11-2002 06:35 AM     Click Here to See the Profile for mellowyellow        Reply w/Quote
I had pwer steering fluid in my 65-no problem. When it was done, everything was new or rebuilt including pump. Filling, turned the wheel from lock to lock a few times, with cap off, to get the air out of system. Sounds like the pump is not working or there is a problem with the control valve. Are your hoses hooked up properly with no restrictions? The shop manual mentions a relief valve in the pump. If you have a Ford manual, read the section on power steering.

Pierre
Gearhead

Posts: 661
From: Near Paris, France
Registered: Apr 2002

posted 09-11-2002 12:12 PM     Click Here to See the Profile for Pierre        Reply w/Quote
quote:
Originally posted by mellowyellow:
I had pwer steering fluid in my 65-no problem. When it was done, everything was new or rebuilt including pump. Filling, turned the wheel from lock to lock a few times, with cap off, to get the air out of system. Sounds like the pump is not working or there is a problem with the control valve. Are your hoses hooked up properly with no restrictions? The shop manual mentions a relief valve in the pump. If you have a Ford manual, read the section on power steering.


Interesting ! How is this fluid doing as far as leaks. Type F is a lot thicker and already leaks out of the control valve, a drop here and then no matter what.

mellowyellow
Gearhead

Posts: 8198
From: So. Fl.
Registered: Aug 2000

posted 09-11-2002 04:45 PM     Click Here to See the Profile for mellowyellow        Reply w/Quote
They all leak, I believe. It seems OK and works well but does leak a little. I wouldn't have used it but a friend put it in. It says mult-purpose. Next one I'll use type F. On the topic of F, did not use it in trans, used the new stuff on recommendation from tranny shop who built it. No problem.

PONYMAN
Gearhead

Posts: 421
From: Ardmore, Ok. USA
Registered: Jul 99

posted 09-11-2002 05:50 PM     Click Here to See the Profile for PONYMAN        Reply w/Quote
I replaced everything on my 72, hoses, control valve, and pump. I refilled it with Valvoline synthetic power steering fluid with leak stop, and haven't had a leak yet, and this has been over 6 months.

460-67Stang
Gearhead

Posts: 296
From: Idaho, USA
Registered: Feb 2001

posted 09-12-2002 03:06 PM     Click Here to See the Profile for 460-67Stang        Reply w/Quote
Everything on my power steering system is 1000 miles new and is in good shape. I initially used the original pump, but had to replace it...which is when the problem started.

I'm running the stock PS cooler that mounts above the PS pump on the mounting bracket. I think it's cooling the fluid adequately.

I'm thinking I'll change out the fluid to type F and sse if that solves the problem. The old pump was running type F and never squealed at all..it just started leaking badly.

Thanks for all the advice!
Brian

beachbum
Gearhead

Posts: 307
From: Florida
Registered: Oct 2001

posted 09-13-2002 11:44 AM     Click Here to See the Profile for beachbum        Reply w/Quote
While on the subject of power steering fluids. I have the original 1968 power steering pump [rebuilt] but the fluid in it is clear, not red like trans fluid. I need to add a little fluid as it's low on the stick. Can I mix the type F fluid [red] with the clear power steering fluid?

Pierre
Gearhead

Posts: 661
From: Near Paris, France
Registered: Apr 2002

posted 09-13-2002 11:47 AM     Click Here to See the Profile for Pierre        Reply w/Quote
I would'nt.....U just never know with chemicals

460-67Stang
Gearhead

Posts: 296
From: Idaho, USA
Registered: Feb 2001

posted 09-13-2002 08:56 PM     Click Here to See the Profile for 460-67Stang        Reply w/Quote
Just spoke to a knowledgeable, reliable mechanic I know. He says the fluid is most likely not the problem and said that regular PS fluid (clear type) is better than the Ford "F" type and always uses PS fluid himself. Today's PS fluids have much better lubricants in them...according to this guy.

He said the rebuilt pump is most likely bad and I should swap it for another. I'll try that and see what happens. What a pain though...I just got it all together! Now I have to pull that darn pulley again!

On the subject of leaking control valves....I'm running a '78 Granada PS control valve with no leaks (yet anyway). It has the rubber o-ring style connections which should not leak. If you're looking for a leak proof control valve, install a Granada unit. You'll have to update your hoses for the o-ring connection however.

Thanks for your help!
Brian

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 09-14-2002 06:35 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
quote:
Originally posted by PONYMAN:
I replaced everything on my 72, hoses, control valve, and pump. I refilled it with Valvoline synthetic power steering fluid with leak stop, and haven't had a leak yet, and this has been over 6 months.

The '71-'73 system is a VASTLY better system than the '65-'70 mess.

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'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

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