Air Brake Accuators

[timvasqz]

the units are cheap and durable. You can imagine with the price how flimsy the
diaphragm is. (you can see them used as lock actuators on dumptruck tailgates.
My mobile tech charges $20per unit install.)

The spring brake diaphragm is the one to watch because no one ever hears it
leaking. that is why it is a good idea to chock the tires, build airpressure,
turn the parkbrake off then shutdown the engine and listen. If the air leaks
down quicker in this instance than it does with the bus parked-parkbrake-on, the
spring diaphram is leaking. once it tears you could be doing 70 mph and it will
put the brake on. driving along it will not stop you but it will put a strain on
the forward motion and build up heat at the drum real quick.

leaking diaphrams dont show up with a low pressure warning at the dash if the
compressor is able to keep up with the demand cfm.

Greg ofTim&Greg
94ptca


--- In WanderlodgeForum@yahoogroups.com, "D" wrote:
>
> Thank you all for the comments. I have them all in now and everything works
well! I bought new chambers all the way around. Fleetpride had them on sale. $35
each for rears and $34 for the fronts. A dollar more for the spring brake, I
guess. I suspected they were imports, but they tout the USA flag on the side! I
think I all good! Thanks again! On our way to Orlando!
>
> Bye, for now
>
> Dru and Debora Penland
> 83FC35RB
> Steady Gittin' It! is her name
> --- In WanderlodgeForum@yahoogroups.com, "timvasqz" wrote:
> >
> > if you open up the pot all you need to do is replace the diaphram. Here is
a good diagram of how the two work.
> >
> > http://www.zafr.com/trucktcom/b_chmbrs.htm
> >
> > the double pumkin one which has the spring brake is the dangerous one. the
single pumkin one has a return spring only. you can be shure by pulling on the
lever if it wont move it is high pressure the other one is easy to move.
> > Greg ofTim&Greg
> > 94ptca
> >
> > --- In WanderlodgeForum@yahoogroups.com, "birdshill123"
wrote:
> > >
> > > Hi Tim: I took the old and new brake pots to a brake specialist in
Mexico. Probably the dirtiets shop I have ever seen. The service is outside. A
few pits and one big steel ramp that you can drive up onto. Inside it was
cleaner. He sold clutches and reriveted blocks. He also resurfaced flwheels.
Even had a nice Czech lathe ( they are the best). He had these steel tables made
from huge flwheels. Must have been from mining equipemnt. They had built jigs to
hold the brake pots and had air cylinders that held them together while you
undid the bands. Very ingenious.For a few dollars they did it all and I was
safe!
> > >
> > >
> > > Bruce 1988 FC35
> > >
> >
>