air chamber

[Gregory OConnor]

the air chamber with and without a spring parking brake are
relativly inexpensive, under $100 each. a rubber diaphragm in the
chamber is the wear part.

folks neglect to test the park brake diaphragm and 'parkbrake hold
off lines' for leaks. To Test: Build pressure, chock tires, release
park brake, rebuild pressure (20 seconds) then shut the bus down and
listen for leaks. if the leak down time is quicker than leakdown
with park brake on, you have an issue.

here is a good trouble shooting guide for air brakes

http://bepco.biz/AirBrakeCat/10-14.pdf

When you replace hoses, many of the ends are reusable. rubber hoses
fail inside and out. whenever application possible, plastic is an
upgrade. Plastic air line is tough stuff.

Remember to block up the frame before poking around under a bus that
is held up by air bags.

GregoryO'Connor
94ptRomolandCa

--- In WanderlodgeForum@yahoogroups.com, "gasparillaglass"
wrote:
>
> its the air chamnber at the brake
>