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Steering pump - do they work with no fluid?? 

 

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 Post subject: Steering pump - do they work with no fluid??
Posted: Wed Sep 24, 2008 11:03 am 
Getting Side Ways
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Hi, stupid question: will a power steering pump's bearings work with no fluid? I'm putting a new motor in that had power steer which my car doesnt have, but i want to retain the pump for a while to keep the fan belts happening...so if this pump is just spinning away with no fluid circulating what will happen? Will the bearings in it survive??

 

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Posted: Wed Sep 24, 2008 11:30 am 
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No they wont - the bearings are lubricated by the fluid.

Do you need the p/s pump? - can you not just get a shorter belt?
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Posted: Wed Sep 24, 2008 11:46 am 
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im not sure about this method: How bout use a second hand pump from wreckers and just take out the fluid lines so the fluid in the pump wont mix with yours. im pretty sure that youll need the fluid inside the pump for its longevity and for the steering. im not sure what will happen to a pump that has been used without fluid for long period of time. perhaps internal damage as Nigel said.

 

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Posted: Wed Sep 24, 2008 12:08 pm 
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just leave the pump on there and run a shorter belt to bypass it.. belt shouldnt cost more than $60-70 which would be cheaper and easier than trying to get another pump and fit it..


-mitch

 

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Posted: Wed Sep 24, 2008 2:04 pm 
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i can give you a number for someone in adelaide that will prolly swap your power steer pullies for non power steer pullies....
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Posted: Fri Sep 26, 2008 4:20 pm 
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hi guys,
thanks for all the replies, I thought it was going to be simple as , shorter belt etc. Problem(s) are, though, that alternator has its own belt - the power steer belt also powers the water pump/fan so you need a third pulley to be able to take the slack out of the belt...I thought about moving the alternator over to the other side, but the crank pulleys are quite different in diameter, this would make the alt run alot slower...

I've still got the p steer pump, but last nite made up a short hose to join outlet pipe to inlet pipe and can leave a small amount of fluid in there to keep it going...

I think one of the replies got a bit confused - the car has NO power steering on it, just the motor has the pump setup...

 

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Posted: Sat Sep 27, 2008 12:31 pm 
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The power steering system is a "Open centre hydraulic system" What this means fluid just runs around the hoses with no restriction, until you turn the wheel. This is when the oil is ported to the power steering box/racks piston which is what makes it easier to turn.

Hooking the pressure line to the return is the way to go, and this is how the system normally operates. When you hook the two lines together it will not produce any pressure, and will have very little load on the belt.

You should be able to put the correct amount of oil in it and you can be sure the pump won't be damaged.
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Posted: Sat Sep 27, 2008 12:49 pm 
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tearlejc wrote:
hi guys,
t

I've still got the p steer pump, but last nite made up a short hose to join outlet pipe to inlet pipe and can leave a small amount of fluid in there to keep it going...

I think one of the replies got a bit confused - the car has NO power steering on it, just the motor has the pump setup...


that was going to be my idea :P

yes some ppl do not read the OP thread correctly and gets on my nerves!

 

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Posted: Sat Sep 27, 2008 2:27 pm 
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I would be concerned that the oil would heat up in this config
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Posted: Sun Sep 28, 2008 11:55 am 
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Why would it overheat? There is no load on the pump.
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Posted: Sun Sep 28, 2008 12:03 pm 
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No load, but your still pumping fluid through some small pipes under pressure. Theres going to be heat generated regardless.
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Posted: Sun Sep 28, 2008 5:56 pm 
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Under pressure? How will a 5/16" pipe create enough restriction for pressure to build up?

If you are concerned about the temp Nigel, perhaps you should try running a pump like this and see what actually happens. Because you obviously don't know what does happen.

You might learn something!
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Posted: Sun Sep 28, 2008 6:41 pm 
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I may not know - but im also not willing to take the risk. The restriction is the pipe, from the pump. I know its negligible, however on the normal vehicle the oil is still run out the front of the car. On one of my older cars I needed to have a cooler out the front.

Im not silly, but im also not keen to take risks : in this case, if the pump fails, so does the car.

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Posted: Tue Oct 07, 2008 9:11 am 
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Thanks for all the replies - I don't see how this restriction in the pipes thing works - these are the standard pipes...anyway thanks for the advice about the pump idling away.
If the pump fails, by the way, it won't strand the car - as I keep saying, the car does not have power steer....frankly, I don't care if the pump dies eventually, I'm only using it as a stop gap measure until I work the belts out - I may end up just making an idler with some bearings...

 

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Posted: Tue Oct 07, 2008 5:20 pm 
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Hooking the pump back up on its self will owrk fine. Has been done many times over the years with no bad effects whatsoever.

 

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