So what's wrong with this picture? Or what's NOT wrong!

[mikebulriss]

Ratxnfratzn#%*+#! On the return trip from east Texas the air pressure gauge started going to 140, 150, 150+. I pumped the brakes to get the pressure down and it behaved for a while and then climbed again. I stopped and let it fully cycle again and then proceeded home with no further problems. After crawling around under the bus this weekend, I spotted this in the attached pictures. I guess no further question as to the air pressure variation. Not sure I can believe we got home!


Crap! Not even close to finished on the prior "to do" list. At least I now know that the emergency high pressure relief valve on the air dryer works.

[GregOConnor]

Bendix governor . I wander ( not wonder) if the f'ed valve is the cause-problem or the damage-result of a non reacting compressor un-loader valve?
here is bendix's troubleshooter pdf
http://www.bendix.com/media/documents/pr...gguide.pdf
I know you are up on the topic but here is where I got my info in the past. it may be helpful for others.


Here is a video that explains the basics. old but helpful since it is bare bones
https://www.youtube.com/watch?v=42u4v-AbWA4

here is a series that I use also
https://www.youtube.com/channel/UCr6wcRy...OZFlT1joCA