Air leaking from front when brakes applied

[gregory O]

slack adjusters on the drive axle got damaged? I believe tcompounding cauld
damegd the slack adjusters. the drive is the axle with the park brakes (drive
axle has four tires)( Tag has one each side).
Greg
94ptca
--- In WanderlodgeForum@yahoogroups.com, "P & D" wrote:
>
> Wow, that is a bunch of good material, but I may still be confused about the
> anti-compound valve, is it working correctly or not working correctly.
>
>
>
> To add more to this mystery, it was just in the shop and they had to replace
> 2 stripped auto slack adjusters to the brakes, could this have been because
> too much pressure was applied with both the parking and regular brakes
> applied at the same time? Also when I plugged the hose, the spring brake
> released, is that what you want it to do if you have applied the brakes.
>
>
>
> Thanks for all the info too
>
>
>
> Paul
>
> 87pt38
>
> Hesperia CA
>
>
>
> From: WanderlodgeForum@yahoogroups.com
> [mailto:WanderlodgeForum@yahoogroups.com] On Behalf Of gregory O
> Sent: Sunday, November 01, 2009 7:21 PM
> To: WanderlodgeForum@yahoogroups.com
> Subject: [WanderlodgeForum] Re: Air leaking from front when brakes applied
>
>
>
>
>
> it is the anti compouning valve blowing air ?? when the spring brake is
> left pushing (park brake on) and someone pushes on the service brakes, the
> valve proportions the pressure working the cams on the axle that hold the
> spring brakes so there is not too much pressure on the shoes. if the valve
> is crapped out you get broken shoes with no sign of heat that made the
> cracks .
>
>
> to keep from giving a lecture then getting a lecture from the mods, check
> <http://www.wsafc.org/WSFMA/Shared%20Docu...ke%20Handb
> ook.pdf> out page 27 of Bendix handbook
>
>
> http://www.wsafc.org/WSFMA/Shared%20Docu...e%20Handbo
> ok.pdf
>
> here is a good video of <http://www.youtube.com/watch?v=qJa5-_ExsBE> the
> principles of AB without much of the new safety crap confusing the process
> it is from 1967
>
> http://www.youtube.com/watch?v=qJa5-_ExsBE
>
> Greg
> 94ptca
>
>
> --- In WanderlodgeForum@yahoogroups.com, Curt Sprenger
> wrote:
> >
> > Paul,
> >
> > What you found and determined does not seem right. Post pictures if you
> can.
> > I looked under our coach this afternoon. I see a 1/8" plastic air line to
> > the cylinder that rotates down the driving light. Above that area on the
> > bottom of the frame rail there are some copper and plastic air lines. None
> > are open as you describe.
> >
> > Curt Sprenger
> > 1987 PT38 8V92 "MacAttack Racing"
> > Anaheim Hills, CA
> >
> >
> >
> > On Sat, Oct 31, 2009 at 2:35 PM, P & D audvid1@ wrote:
> >
> > >
> > >
> > > Thanks you all for the assistance. Got some help today and we climbed
> > > under coach and found a ¼ air line on the driver side front right
> behind the
> > > fog lights that when you step on the brakes air comes out of that line
> and
> > > as soon as let off it stops. After looking at drawings and trying to
> figure
> > > out where the other end should be connected, by accident we discovered
> that
> > > if you plug the hose, the coach emergency brake released. (Good thing we
> > > are on a level lot) and if you un plug it, the emergency brakes stay
> > > locked. Then we tried it with the emergency brake released and no air
> came
> > > out, so I think it is releasing the air bypassing the emergency brake so
> as
> > > to not release the emergency brake.
> > >
> > >
> > >
> > > Hope all that made sense, but it appears that is normal operation,
> although
> > > I never recall hearing that noise before when I stepped on the brake.
> > >
> > >
> > >
> > > Thanks again for all the help
> > >
> > >
> > >
> > > Paul & Debbie Potter
> > >
> > > Hesperia CA
> > >
> > > 1987 PT 38
> > >
> > > Hotel California II
> > >
> > >
> > >
> > > *From:* WanderlodgeForum@yahoogroups.com [mailto:
> > > WanderlodgeForum@yahoogroups.com] *On Behalf Of *Wayne Kotila
> > > *Sent:* Monday, October 26, 2009 1:56 PM
> > > *To:* WanderlodgeForum@yahoogroups.com
> > > *Subject:* Re: [WanderlodgeForum] Air leaking from front when brakes
> > > applied
> > >
> > >
> > >
> > >
> > >
> > > Did you check the rubber hoses to the front brakes? When you step on the
> > > brake pedal air pressure applies your front brakes so you will have air
> > > pressure in the supply hoses to until you take your foot off the brake
> > > pedal. Sometimes from age those hoses will start leaking where the end
> is
> > > crimped on the hose and if you need to replace them, a farm supply store
> > > will carry high pressure hydraulic hose in different diameters and
> lengths
> > > and have different end adapters to convert the end connector to what you
> > > need. You should be able to get a new hose and adapters if needed for
> under
> > > $20.00.
> > >
> > > Wayne
> > >
> > > 1996 WB42
> > >
> > >
> > > ------------------------------
> > >
> > > *From:* ppotter14950 audvid1@
> > > *To:* WanderlodgeForum@yahoogroups.com
> > > *Sent:* Sun, October 25, 2009 9:38:25 PM
> > > *Subject:* [WanderlodgeForum] Air leaking from front when brakes applied
> > >
> > >
> > >
> > > Hi there
> > >
> > > Today while finishing up Air Force One supplemental braking install for
> > > towed vehicle, had engine off and when applied brakes to test Air Force
> One
> > > and while pedal was depressed there was a constant air leak up front
> around
> > > the left front area, but could not find it. Any suggestions on where it
> > > might be, will work on taking front driver side panel open and looking
> in
> > > there, but it is so tight in there and i dont know what i am looking for
> so
> > > any suggestions would be appreciated.
> > >
> > > Thanks
> > >
> > > Paul & Debbie Potter
> > > 87PT40 - Hotel California II
> > > Hesperia CA
> > >
> > >
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