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hard brakes, even after new booster pump

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  #16  
Old 12-05-2013, 06:54 PM
crazy8 crazy8 is offline
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Yeah i'll remember to do that, where's it at?
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  #17  
Old 12-05-2013, 07:22 PM
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When mine was like that Richard, I put a little goop over it and it lasted for years. Finally I had to cut it and put a rubber vac line over the ends. Guess what I sealed the ends with?? LOL
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  #18  
Old 12-05-2013, 07:27 PM
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^^^ Is that in reference to the check valve? Wow, that's, er, thrifty! New one is about $5 at the FLAPS.
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  #19  
Old 12-05-2013, 07:49 PM
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Quote:
Originally Posted by DarkStarMedia View Post
here is mine...
Click the image to open in full size.

But my brakes work fine. this hose controls the recurc door. So if there is no difference between Max AC and normal AC... this is the problem.

I am betting on the one way valve on the booster...

Richard
I was referring to this picture.
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The 'Old Gray Mare' 97 dually cc, rest in peace. To be resurrected by a fellow FTEer!
The 'Babe the Blue Ox' 97 dually EC,T4 s366,DI IC,stage I's,Hydra,studs,springs,pushrods,swamps HVHF IDM,John Woods auto,FS2500 oil bypass,3"DP-4",SD dual tensioner,6.0 trans cooler,turbo silencer,adrenaline
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  #20  
Old 12-05-2013, 09:27 PM
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Gotcha. Ours cracked when I bumped it one cold day (they get brittle when cold). At the cabin, middle of nowhere. We yanked the pickup tube out of one of those pump-bottles of hand cleaner and fixed it with that and some duct tape, and kinda forgot about it until... well... now....
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  #21  
Old 12-05-2013, 09:55 PM
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That was a good quick fix!
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The 'Mule' 96 2WD F250 EC/LB auto PSD, semi-retired.
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The 'Babe the Blue Ox' 97 dually EC,T4 s366,DI IC,stage I's,Hydra,studs,springs,pushrods,swamps HVHF IDM,John Woods auto,FS2500 oil bypass,3"DP-4",SD dual tensioner,6.0 trans cooler,turbo silencer,adrenaline
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  #22  
Old 12-06-2013, 06:47 AM
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So where is the check valve located? And what all does the brake booster pump run? Thanks for the help
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  #23  
Old 12-06-2013, 07:39 AM
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Quote:
Originally Posted by crazy8 View Post
So where is the check valve located? And what all does the brake booster pump run? Thanks for the help
Brake booster pump? Do you mean the hydro-boost? It runs off the power steering pump. You have to build the system as your truck did not offer that as an option. A few guys on here have done that. And there are threads on here that go through how to do that.

If you're talking about the vacuum pump, it runs the brake vacuum booster and the climate controls in the cab. That's it.
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  #24  
Old 12-06-2013, 07:48 AM
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Yeah sorry the vacuum pump, so all my heater controls work except my vent control, what would that indicate?
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  #25  
Old 12-06-2013, 07:58 AM
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The check valve is on the booster. Right where the vac line goes into the booster, you'll see it. Looks like this:
Dorman HELP! 80190 Brake Check Valve : Amazon.com : Automotive Dorman HELP! 80190 Brake Check Valve : Amazon.com : Automotive
, but may be white.
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  #26  
Old 12-06-2013, 08:02 AM
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You likely have a leak in the vacuum line going to the vent door, or the operating mechanism is broke. Someone else I hope will chime in on this. I haven't dug into that part of these trucks.
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