2012 Cascadia owners

Mpali5

New Member
How often does your air compressor cycle? 2012 cascadia uses air pressure for the def pump. Mine cycles Every 4-6min which I think is too often. Curious to see what others do?
 

Mpali5

New Member
The air drains down as soon as I start driving. I think something to do with the air operated def pump.
 

mndriver

curmudgeon extraordinare
Supporter
You've probably got a bad diaphragm on brake chamber if it starts as soon as you start driving.
 

Mpali5

New Member
Brake chamber would leak as soon as I released the brakes. My leaks only when moving. I really think that my def pump is using too much air
 

Injun

Rabid Squaw
Staff member
Supporter
Well, then, replace the DEF pump.

When that doesn't work, look at the governor and brake system.
 
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