Air Brake REFRESHER and TEST procedures incl. Leak test

[dentmac]

Perhaps I wrote it a bit confusing---

But the test you quoted is to check when the low pressure warning signal activates--- It must activate before the pressure falls to 55 PSI

The test (in the post) that the Spring brake is working-- It has to be set--- then try to drive.(adding a little power in gear)

Ross

sa

(10-16-2014 10:57)Deb N Randy Wrote:  

(10-15-2014 17:56)dentmac Wrote:  Safety FIRST.

-The low pressure warning alarm must come on above 55 psi (usually 60)
-----------------With the engine not running and the emerg on , fan the brake peddle until the light/alarm comes on. Must come on before the gauge reads 55 psi.

Note that the Spring/emerg brakes will automatically activate near or below 55 PSI

Always good to check brakes. But when checking the automatic spring brake do not have your emergency brakes on, as that is what you're testing. Chock the wheels if necessary.. Usual range is 20-40 psi.