Dumbest Hydro Boost question ever

[sapper]

Just got the system on and ready to bleed when i thought, what fluid do I use? Does the steering box still use power steering fluid and the brakes brake fluid?? Yes I feel dumb but dont want to screw anything up, thanks

 

[sandawgk5]

Yep they are seperated internally. Brake fluid in the MC and Power steering fluid or ATF (which ever is your pref) in the Pump.

Ira

 

[sapper]

Thanks

 

[k5redneck]

Yep they are seperated internally. Brake fluid in the MC and Power steering fluid or ATF (which ever is your pref) in the Pump.

Ira

just to add to that... if atf or p/s fluid is added to the master be ready to repleace every rubber peice of the brakeing system

 

[73k10sub]

My hydro boost uses DOT 5 brake fluid, not DOT 3 like vacuum boost systems.

 

[tiny2085]

I just finished my hydro assist last night, and when I got out from driving it, I heard gurgle gurgle sounds in the steering box. Do you guys think this is A)air bleeding itself out of the system B) the ATF got hot to the point of boiling ? The steering box was warm to the touch.

 

[R77K10]

just to add to that... if atf or p/s fluid is added to the master be ready to repleace every rubber peice of the brakeing system

if that were true then why are there rubber seals on p/s lines and inside trannies ?

 

[4X4HIGH]

They are made of a different material. He is correct, P/S fluid in the brake system will make all rubber components bad within a VERY short time. I had a friend make this mistake once.

 

[tarussell]

They are made of a different material. He is correct, P/S fluid in the brake system will make all rubber components bad within a VERY short time. I had a friend make this mistake once.

I'll back that up too ! The two systems use different durometer and types of material. Bad things will happen if you get the fluids in the wrong place.

Tom

 

[rwright07]

oo man i may be in trouble.... how long does P/S fluid need to be in there before it cuases much damage?
dont ask...haha

 

[dremu]

My hydro boost uses DOT 5 brake fluid, not DOT 3 like vacuum boost systems.

DOT5 is the silicone stuff, right? Ex-military vehicle, i.e. CUCV, by chance?

My M1009 was marked for DOT5, but the previous owner, a local PD, had already converted it BACK to DOT3.

Which is good, as DOT5 is hard as hell to find 'round here. And expensive. Should I ever get another CUCV, I'm flushing the thing out with DOT3 and keeping it there.

-- A