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New to S60- the power steering!!!

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Old Jan 23rd, 2020, 19:44   #11
pierremcalpine
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Sounds like the symptoms I had. I tried replacing the pump, changing fluid, changing reservoir, no difference.

Finally worked up the courage to to replace the rack. Ahhhh, problem solved.
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Old Jan 26th, 2020, 13:21   #12
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what do you mean orange cap.

I;ve had 2001 and 2007 and both had black caps?
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Old Feb 8th, 2020, 19:19   #13
mchell
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ok.

finally had the time to replace fluid.

needless to say the one there was dark, kind a brownish. So replaced with the ch11s stuff (green) and cleaned all up nicely (hoses, reservoir)

No change in symptoms. Power steering still somehow hard to turn.

Also, went for a drive (some 20+ miles), after which went to check the steering fluid.

The pressure build up this time was so much that upon removing the cap, the reservoir actually shrunk (visibly!) right when cap was removed!!! And at the reservoir bottom, where the hose goes into the pump, there's a visible moisture around the jubilee clip and an inch below at the hose surface.

So two questions now spin on my head:

1. Would I benefit with a new (upgraded) PAS reservoir?

2. Could this pressure be caused by a worn out pump? In this case i cannot, to my best knowledge, understand if this is even possible, as the effect of a worn out pump would be lower level of assistance (hard to turn steering), not air pressure build up.

As mentioned before, no strange sounds coming from pump. and everything is properly tight with jubilee clips (no chance of air being drawn into the system).


Please advise.

Don’t want to turn this issue into a money pit of attempts of solving a problem without understanding it first.

I already imagined that i could install, as a remedial measure, a pressure relief valve (one way valve with a spring) drilled into the reservoir! (maybe a dumb idea, as then from time to time i would have a purge of power steering fluid coming out in tight corners )

cheers everyone
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Old Feb 8th, 2020, 19:25   #14
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Quote:
Originally Posted by barrybritcher View Post
what do you mean orange cap.

I;ve had 2001 and 2007 and both had black caps?

This type of reservoir is the one in my s60

s-l640.jpg
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Old Feb 8th, 2020, 22:15   #15
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ok.

finally had the time to replace fluid.

needless to say the one there was dark, kind a brownish. So replaced with the ch11s stuff (green) and cleaned all up nicely (hoses, reservoir)

No change in symptoms. Power steering still somehow hard to turn.

Also, went for a drive (some 20+ miles), after which went to check the steering fluid.

The pressure build up this time was so much that upon removing the cap, the reservoir actually shrunk (visibly!) right when cap was removed!!! And at the reservoir bottom, where the hose goes into the pump, there's a visible moisture around the jubilee clip and an inch below at the hose surface.

So two questions now spin on my head:

1. Would I benefit with a new (upgraded) PAS reservoir?

2. Could this pressure be caused by a worn out pump? In this case i cannot, to my best knowledge, understand if this is even possible, as the effect of a worn out pump would be lower level of assistance (hard to turn steering), not air pressure build up.

As mentioned before, no strange sounds coming from pump. and everything is properly tight with jubilee clips (no chance of air being drawn into the system).


Please advise.

Don’t want to turn this issue into a money pit of attempts of solving a problem without understanding it first.

I already imagined that i could install, as a remedial measure, a pressure relief valve (one way valve with a spring) drilled into the reservoir! (maybe a dumb idea, as then from time to time i would have a purge of power steering fluid coming out in tight corners )

cheers everyone
you really need to get the pump tested at the dealer with the correct test gear, it might well be worn creating all that heat within the pump and overheating the fluid after all it only gets warm when the rack is being used a lot and hard ... ,
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Old Feb 9th, 2020, 00:02   #16
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Maybe irrelevant, but do you happen to park on an incline ? What year is the car ? As Clan says a dealer test shouldn't be that expensive and will give a good idea about the pump health
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Old Feb 9th, 2020, 13:32   #17
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Maybe irrelevant, but do you happen to park on an incline ? What year is the car ? As Clan says a dealer test shouldn't be that expensive and will give a good idea about the pump health
No. No parking on incline.


I'll eventually get the pump tested for pressure as well. But as ive mentioned, the pressure build up should not happen IMO. It appears that some relieve valve is not working properly, making the fluid run inside the system pressurised by air. Similar effect to air in brake lines.

Have been looking for others with similar issues and in one other foruns as well ( not detrimental to this one!) And some have suggested to install a new cap to the reservoir. So just ordered a new one. At least as a cheap attempt to address the issue.

I had already observed that in that cap, the dip stick is hollow and then on the top of the cap is a two piece : one disc ( where the orange letters are stamped) and then the hole body of the cap ( where you grab it to open it). Between these two pieces there's one very tiny hole. I suspect this should be some kind of pressure relief valve for the steering system. Mine might be dirty/stuck.

Will post results.


Cheers
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Old Feb 9th, 2020, 13:46   #18
Clan
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Originally Posted by mchell View Post
No. No parking on incline.


I'll eventually get the pump tested for pressure as well. But as ive mentioned, the pressure build up should not happen IMO. It appears that some relieve valve is not working properly, making the fluid run inside the system pressurised by air. Similar effect to air in brake lines.

Have been looking for others with similar issues and in one other foruns as well ( not detrimental to this one!) And some have suggested to install a new cap to the reservoir. So just ordered a new one. At least as a cheap attempt to address the issue.

I had already observed that in that cap, the dip stick is hollow and then on the top of the cap is a two piece : one disc ( where the orange letters are stamped) and then the hole body of the cap ( where you grab it to open it). Between these two pieces there's one very tiny hole. I suspect this should be some kind of pressure relief valve for the steering system. Mine might be dirty/stuck.

Will post results.


Cheers
There is always a slight chuff when you take the top off a warm system , but to get your kind of pressure it much be due to heat .. It is a sealed system and nothing in the system generates heat except a slight warmness if you use the steering a lot for what ever reason .. a worn pump will generate friction which heats the oil too much .
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Old Feb 9th, 2020, 19:54   #19
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ok. so the heat generated is creating pressure and this can only be related with a worn out pump, because i'm not driving as a maniac

I've been checking online and found some on ebay that have been reconditioned? how come then i cannot find the kits to recondition them myself?

As anyone done it?


Cheers
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Old Feb 9th, 2020, 22:03   #20
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Originally Posted by mchell View Post
ok. so the heat generated is creating pressure and this can only be related with a worn out pump, because i'm not driving as a maniac

I've been checking online and found some on ebay that have been reconditioned? how come then i cannot find the kits to recondition them myself?

As anyone done it?


Cheers
It doesnt matter how you drive , the fluid just goes around and around all the time it gets mildly warm due to the work it has to do when steering , but that is lost to the air from the alloy pipes under the car . a pump with rough worn vanes and housing will cause a lot of friction . Was there a grey colour to the oil indicating powdered cast iron from the pump ?


I would compare prices with a volvo one first , generally you get what you pay for ,
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