Low air

[James Harvie]

Jim, it sounds to me that you started having problems, when you hit the brakes.
My guess is you either have a leaking service, or maxi pancake (diaphram). The
reason you didn't hear anything, is because if it's on the service end, it won't
make any leaking noises, untill you step on the pedal ( which is when you saw
the pressure dropping) If it's on the Maxi,(parking) side, you won't hear it
leaking, untill you press the button in. I'd have someone sit in the seat while
you walk around. First chock the wheels, on a level surface, have them press in
the parking brake button, and listen, if you hear leaks, it's on the parking
end, either the pancake, or a cracked housing leaking enternally if you don't
have them step on the pedal and listen again if you hear leaks, it's on the
service end. Don't attempt to take those rear chambers apart, unless you know
what you're doing and cage them first, There's a coil spring inside, about the
diameter of a car suspension coil spring and
if they're not caged, they can be lethal. If you still don't hear anything
leaking, I'll say the air governor, attached to the air compressor, may be
gummed up, and sticking. Please bear in mind, I'm only about 2 weeks into
Bluebird busses,so there could be some other valve in the system, that I'm not
aware of. Oh, and one more thing to check. Make sure the treadle valve (foot
valve), is returning back all of the way some pedals are made from Alluminum,
and they use a steel pin, for the pivot, the two unlike metals cause
electrollosis, or corrosion. I drive the pin out, and run a drill through the
hole, to clean it out, then I apply never seize to the pin. Good luck

Jimmy Harvie
Tom McCarthy wrote: 82 FC Boston Ma For
$12, why would anyone rebuild anything. I'll take your whole
Bird for that $12 offer! ;-)

Tom McCarthy
95 PT42
Poway, CA

--- In WanderlodgeForum@yahoogroups.com, "Dan Darst"
wrote:
>
> For about 12 bucks you might try rebuilding the purge (spitter)
valve at the
> bottom of the air dryer. Could be intermittently hanging open. OR
you could
> just buy my whole bird which does not have that issue but if it did
it comes
> with two spare rebuild kits.
>
> dandarst86fc35rbhuntleyil.
>
>
> >From: "chunkymar"
> >Reply-To: WanderlodgeForum@yahoogroups.com
> >To: WanderlodgeForum@yahoogroups.com
> >Subject: [WanderlodgeForum] Low air
> >Date: Tue, 20 Mar 2007 17:48:52 -0000
> >
> >I have a 82 FC 35 SB. "Serendipity" I have been reading the post
> >for over a year now and have benefited from all of the knowledge
> >here. I have been able to alot of upgrades repairs from reading
the
> >forum. But now I have a problem and cannot get into the archives
to
> >do some research so I would like some input on my problem. I
picked
> >up the bird from storage yesterday, as usual it started on the
first
> >crank and everything was fine. The air bags came up, the brake air
> >presure read over 75 the seat and step all worked fine. I drove
> >down the road about 3 miles turned into the the rv park and noticed
> >the low air light and buzzer came on. When I got to my lot I let
it
> >idle for a few minutes but the warning never went off. My brake
> >preasure was down a little the step would not work. The rear bags
> >were up the front looked alittle low. As I touched the brake
peddle
> >the rear air guage started going down. So I parked it right away
> >cuz I knew if I lost anymore air the rear brakes would lock up. I
> >left the engine running and tryed to go around the coach to listen
> >for an air leak. I couldn't hear any but with the engine noise it
> >war hard to tell. After shutting down the engine. I still
couldn't
> >haer any thing. Where do I start? A day later and the rear air
> >bags are still up and the front look low or down. I did not dump
> >the air yet. Any help would be greatly appreciated.
> >
> >Thanks
> >Jim Marsh
> >82 35FC
> >
> >
> >
>
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