RPG Power Steering Resivor leaking out of overflow?

[Mluis11]

Yes, as I already said, ONLY when off-roading when you are really working the steering. It does weep all down the sides on the PSS unit and yes it never is that much. It looks like more when you see it but then open the cap and its like, wow thats not as low as I thought by looking at the mess.

RPG by far has the better design with the overflow tube that you can put a water bottle on to catch if you don't want it running down your frame. PSS ones not so much.

I think the pressure value on these aftermarket ones must be lower than stock? Is it 14-18psi? Could you get a replacement valve with a higher release, maybe 30psi and go that route instead?

Anyone know the PSI our system runs at and what the factory reservoir is set at?

If I do go the foam route, I will always put in a new piece for each offroad event so it should never have enough time to deteriorate. If I recall the factory reservoir has a screen in it where it exits and neither RPG or PSS has a screen, why?

Thanks for the clarification. Sorry I made you repeat yourself. Capitalizing only this time around really helped me understand[emoji106]

I think I'll just use an extra happy sock to wrap the reservoir to soak up the weeping[emoji23]


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[Deleted member 12951]

Thanks for the clarification. Sorry I made you repeat yourself. Capitalizing only this time around really helped me understand[emoji106]

I think I'll just use an extra happy sock to wrap the reservoir to soak up the weeping[emoji23]

No problem. Isn't this forum full of us always repeating ourselves since nobody searches and we see the same question asked over and over again. So no worries, used to it. LOL

But there is another great idea, stick a sock around it, so simple but effective. Thanks!!

 

[BigGriff023]

I wanted to give an update: I have my huge square foam block in my garage. I just emptied my water bottle which had been collecting PS Fluid for approx 4 months. I will put a foam piece in my resivor for about two weeks and see if there are any drops in my new collecting container. Here is a picture of the amount of fluid that has drained through the vent hose.

 

[Yukon Joe]

I'm just relaying what I was told. Try it and see if it helps. You may also want to try and replace the cap.


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The restriction is that crimp on the hose. You should be able to cut it off.

It is acting like an orifice, which increases the pressure in the system. If it is removed, system pressure will come down. Which would help keep it lower overall during operation.

Yes, as I already said, ONLY when off-roading when you are really working the steering. It does weep all down the sides on the PSS unit and yes it never is that much. It looks like more when you see it but then open the cap and its like, wow thats not as low as I thought by looking at the mess.

RPG by far has the better design with the overflow tube that you can put a water bottle on to catch if you don't want it running down your frame. PSS ones not so much.

I think the pressure value on these aftermarket ones must be lower than stock? Is it 14-18psi? Could you get a replacement valve with a higher release, maybe 30psi and go that route instead?

Anyone know the PSI our system runs at and what the factory reservoir is set at?

If I do go the foam route, I will always put in a new piece for each offroad event so it should never have enough time to deteriorate. If I recall the factory reservoir has a screen in it where it exits and neither RPG or PSS has a screen, why?

You are on the right track here. The cap on the reservoir is a 13 psi cap. Which acts like a pressure relief valve. When the system pressure reaches 13 psi, it starts to compress the spring in the cap, which exposes the overflow opening in the filler neck, allowing fluid to escape. Thus bringing the system pressure down.

You can buy a higher rated cap, say 21 psi. That is the next standard pressure. However, the question remains. "What pressure is the system originally designed for?"

The stock system does not allow for system pressure relief. Inspection of the OEM cap and reservoir did not reveal any pressure rating. The OEM reservoir also has a screen filter in the reservoir (as you mentioned). The filter adds flow resistance and increases the pressure on the upstream side and not enough flow on the downstream side. Which is why the pump would cavitate under spirited driving. Since this is removed, in theory the aftermarket reservoirs allow the system to operate at a lower pressure. But how much lower?

You could try a higher pressure cap, but you don't want to go so high as to defeat the purpose of the overflow to begin with. Otherwise you could blow a hose, or a seal, which would leave you without any power steering.

I don't think the foam will completely eliminate fluid coming from the overflow. The pressure in the system will openthe PRV and allow the stem to be vented. The foam will most likely keep what is spewed out to a fine mist.
@Yukon Joe
Drive your raptor here!!!!
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[BigGriff023]

So maybe try a 16 psi cap? (Assuming it's a standard size cap I can buy at autozone)

 

[Trick.Raptor]

Have you done the foam yet?
I haven't had a chance myself.

I did... just enough to keep the foam at the top and after 200 street miles it was dry when I went to look at it. It fell in to the PS reservoir and soaked up some fluid... I'm not going to put another one in though until I go off-road then see how it goes. For everyday use I won't risk running the foam.

 

[Yukon Joe]

So maybe try a 16 psi cap? (Assuming it's a standard size cap I can buy at autozone)

Yup. Worth a try I think.

The other thing I was thinking was the oil will deteriorate the rubber gasket in the cap. Causing premature leakage. We may need to replace them every now and then.
@Yukon Joe
Drive your raptor here!!!!
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( * Y * )

 

[Deleted member 12951]

Yup. Worth a try I think.

The other thing I was thinking was the oil will deteriorate the rubber gasket in the cap. Causing premature leakage. We may need to replace them every now and then.

Don't think that is it. For the RPG or PSS it is not leaking around the cap, just through the pressure relief valve. I believe they are different. The PSS relief is in the center of the cap and the RPG is on the side where the hose attaches. We are also using quality fuel foam. I thought that was designed to withstand deterioration as this stuff usually goes in gas tanks. Would not gasoline be harsher on the foam than PS fluid?

 

[Yukon Joe]

I was referring to the rubber on the radiator cap for the RPG reservoir. The cap is acting as the relief valve. As pressure builds above 13 psi, the spring contacts and opens up the flow path to the overflow port. If the rubber is bad, it will allow leak by under the 13 psi rating.


@Yukon Joe
Drive your raptor here!!!!
www.runraptorrun.com
( * Y * )

 

[Deleted member 12951]

I was referring to the rubber on the radiator cap for the RPG reservoir. The cap is acting as the relief valve. As pressure builds above 13 psi, the spring contacts and opens up the flow path to the overflow port. If the rubber is bad, it will allow leak by under the 13 psi rating.


@Yukon Joe
Drive your raptor here!!!!
www.runraptorrun.com
( * Y * )

Do you have the RPG one?