Power steering breather blowback

**Skiboy** · 10th September 2013, 07:46 PM

My power steering is leaking fluid out the overflow is it sits.

Well I think it is blowing out then slowly dripping down the chassis after shifting the car.

What might cause the fluid reservoir to pressurize and blow fluid out the breather?

Thanks in advance
SKiboy

**Blknight.aus** · 10th September 2013, 08:32 PM

over filled, badly bled, suction side of the pump venturi-ing air in on a supply hose fitting pump sucking air in past the shaft seal.

**Skiboy** · 11th September 2013, 07:41 AM

Worked fine until a week or so ago - may have over filled on last trip but would not have thought by much

Hmmm will monitor

**Rick1970** · 13th September 2013, 06:41 PM

Originally Posted by Blknight.aus

over filled, badly bled, suction side of the pump venturi-ing air in on a supply hose fitting pump sucking air in past the shaft seal.

Yep. Doesn't necessilarly had to have an oil leak at pump shaft to be sucking air in there either....

**Skiboy** · 13th September 2013, 07:08 PM

So how test if past the pump shaft? I guess I will take cap off and watch while running to see if air in reservoir

Skiboy

**Blknight.aus** · 13th September 2013, 07:33 PM

when Im bench testing I start putting hyradulic oil die on the seals that I suspect to be venturing and watch the oil colour.

of course it helps to have access to a wide variety of non dyed oils to begin with.

**Skiboy** · 14th September 2013, 05:59 AM

I was of course looking for some sort of in situ testing I could do or telltale signs

**Skiboy** · 16th September 2013, 11:39 AM

Reservoir practically empty when I looked at it sat and shifted the truck - was full last time I looked - and a heap now on the tray below the bottle

Not leaking anywhere else except the overflow from the bottle (unusual I know but this is a new system so all new hoses etc in this build)

And steering is very heavy like the power steering not working properly - ie full of air

So experts does this mean new pump time or is it rebuild-able (and where/how?)?

Pump looks to be an Eaton pump on a 3.5 v8 motor

Skiboy

**PhilipA** · 16th September 2013, 12:21 PM

Could it be that the filter in the reservoir is blocked?

The old tin jobs have a replacable filter but the plastic reservoirs have to be replaced.
Assume this is an old tin job. Why not try a new filter.
Regards Philip A

**Skiboy** · 16th September 2013, 12:36 PM

Thanks Phillip for suggestion

I should have been clearer about the setup - we are running an after market bottle - alloy with breather hose - that is why I know where the oil is exiting

See pic below - you can see the breather hose running from cap

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