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Pump rebuilt, no power steering??

powermyster

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Ok I rebuild the pump and fit a new hoses....

Filled with steering fluid and started car and as soon as I went to steer there was a brief noise and no power steering. Topped up and steered left to right to bleed and nothing.

Pulled the pressure pipe at the box and the pump is pumping fluid. Pulled the return and my helper said there wasn’t much flow. There is no noise from pump or anything.

Any ideas? Is there anything in the valve body in the box that could have went wrong?
 
Not enough fluid -
I put two heavy magazines under the front wheels so they could turn with no grip on the tires .
Before you start up and have the belt on fill it up and turn the pump in direction it will run for a few minutes while topping up if required .
Install the belt and turn the wheels back left to right a dozen times should be good .
That should get out the air if any .
 
Not enough fluid -
I put two heavy magazines under the front wheels so they could turn with no grip on the tires .
Before you start up and have the belt on fill it up and turn the pump in direction it will run for a few minutes while topping up if required .
Install the belt and turn the wheels back left to right a dozen times should be good .
That should get out the air if any .

should have mentioned, I threw it on the lift and raised it when trying to bleed still no good. Steered both ways a dozen times and still no easier. Never had this before doing steering.

I meant to turn the pump manually but forgot. I have loved it up and it’s was turning fine and smoothly before I installed it. It’s pumping fluid fine.

Might try running the car for a while.
 
should have mentioned, I threw it on the lift and raised it when trying to bleed still no good. Steered both ways a dozen times and still no easier. Never had this before doing steering.

I meant to turn the pump manually but forgot. I have loved it up and it’s was turning fine and smoothly before I installed it. It’s pumping fluid fine.

Might try running the car for a while.

Kinked line , filter backwards -or maybe the pump is not working or pushing enough fluid then ?
 
Did you install the vanes correctly?
 
Did you install the vanes correctly?

The Saginaw pump it both a clockwise and counter clockwise rotation pump. You just put the vane sleeve in flipped over. There is an arrow on the sleeve that points in the direction of rotation (I think)..... I ended up putting the valve and spring behind the pressure line nut in the wrong order and no PS either.

Jim
 
Cheers guys. It’s a federal pump, uses rollers instead of vanes, shaft only goes in one way.

The only thing I couldn’t get at to replace was the pressure control valve in the pump. I took the circlip off the back but for the life of me couldn’t get the assembly out to replace to o-ring, but figured it would be ok since this wasn’t the cause of my leak and it was working before.

I don’t like the way the new line is sitting there is a little tight bend near the gear end, I don’t think it’s enough to restrict flow, but will straighten it a little when I get back see if it helps.

I didn’t notice any filters when stripping the assembly.
 
Stuck open relief valve.
Doug

How do I reset it. I couldn’t get the assemly out.

Gonna have another look now, I’ll try a couple things failing that I’ll have to pull the pump again.

I’ll update you all, thanks for your input
 
How do I reset it.
If it's like TRWs, you don't re-set it, you replace it. Per the book, to set those valves, takes a complicated mess of hydraulic set-up, to set them.

If you have a service manual, that covers the pump, should tell you.
 
If it's like TRWs, you don't re-set it, you replace it. Per the book, to set those valves, takes a complicated mess of hydraulic set-up, to set them.

If you have a service manual, that covers the pump, should tell you.

The manual says it should just pop out and can be checked /cleaned. I just couldn’t get it out. They seem to be set with shims and the manual states the correct number should be reused.

Not sure I’ll get anything done today being St. Patrick’s Day.
AST night I straightened the angle of the pipe some and checked the return from gear by running a hose to a catch pan. I’ve got plenty of fluid circulating but no equipment to check the pressure
 
Mines a 74, unsure of pumps age as engine is a 68. The same assembly is shown in the manual so may be original pump.

I just couldnt get the flow control valve end plug out. It came up but got stuck. I’ll pull it and recheck everything, might shave the aperture slightly to get the plug out.

The manual said that I should not depress more that 1/16” past the snap ring location on reassembly. It also states to press plug in and let the spring back up to try get it out. Can’t say for sure that I didn’t depress to far in my efforts to dislodge it it before I gave up.

See images of my pump from manual

image.jpg image.jpg
 
If the relieve valve is stuck you have to massage it out. Was this a good pump to start? How rusty inside? Here is how I have freed them and it can take from 1 to 5 days depending on how rusty/stuck and the condition of the bottom spring. I soak it in a break free oil, and tap lighty on the top of the valve to push it in some. This is light tapping to crack the initial position, then I tap on it like dribbling a basket ball. Letting it go down against the spring and pop back up from the spring. Soon or later you see it move up some. Once this starts it will come out. It is a machined fit. Be patient. IF the spring was broken underneath from rust. All bets off and chances are you won't get it out.

BUT, how did you put the pulley on? You did not press it on did you? Did you hit the front shaft and push it backwards? There are notes in the SM that warn you to be careful. If the pump assembly was knocked backwards against the large spring and cover, it has unseated and will not prime. Hope that helps, but I think you need to take it all apart again, you must have the relief valve move smoothly. And the former post is correct, you not suppose to swap valve and housing, they were a matched set.
 
Pump was weeping before, working fine. Used a tool for installation and removal of the pulley. The valve has plenty of spring there was no rust inside the pump housing.

I was using my fingers and I
Might try your tapping/dribbling technique.

I think I put the reservoir on last. I wonder if I pushed the pulley in some doing that. I’ll pull the back cover and check the pressure plate didn’t come unseated if I did. Thanks for that I didn’t think of that till now.
 
Last edited:
Right on the mark, Dragon Slayer.

I see what you mean, powermyster, about the roller type pump.

Yup, drain and pull the pump again. You'll only need to pull the can off, to get to the valve, and check it out.

Can't make out the main shaft, that the pulley goes on...but, pretty much for any of them, when you press the pulley onto the shaft, the far end of the shaft MUST be supported. If not, it screws up the pump.
 
This is a federal and the shaft is threaded. So you can put the pulley on after pump assembled. The tool threads in to the shaft and pushes pulley on while pulling shaft out. If this was working, I would leave the relief valve alone. Getting it out that last quarter inch is because of the tight fit. If you push it down and it pops up against the lock ring it is fine.
 
This is a federal and the shaft is threaded. So you can put the pulley on after pump assembled. The tool threads in to the shaft and pushes pulley on while pulling shaft out. If this was working, I would leave the relief valve alone. Getting it out that last quarter inch is because of the tight fit. If you push it down and it pops up against the lock ring it is fine.

Thanks it’s popping back agains the lock ring fine just couldn’t get it out. I have the tool to remove and install the pulley, but thinking back I installed the pulled before the reservoir, should have left it till last.

I may have pressons on the pulley and shaft when trying to get the reservoir on is what I’m thinking
 
A number of years ago my 74 Runners power steering pump started to squeal with the slightest pressure. Like when you hit the stops. Was really emberassing to pull into the gas station and this restored classic sounds like a Rez wagon. So I got a replacement pump from napa. I go to change it out and find the pump shaft is smaller and the pulley won't fit. I was SO MAD. Took 4 trips, talked to 3 different sales reps to finally get what was supposed to be the right one. Any way I had places to go so I took the pulley and beat the son of a bitch back on the old pump with the biggest hammer I had. Pump has been working great since.
I know this doesn't help you any. Thought you might like to here my story
 
Oh no!!! How was this not making noise?? Anyway have go through it all now and see if anything got damaged. Initial inspection it all looks ok.

The only thing I can think of is when I post on the pulley to put the reservoir on

010B8AF8-C901-4C96-9CAB-E8E5BB412443.jpeg
 
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