Bus won't build air pressure once it hits low alarm

[jtlynch74]

My bus is building air pressure at startup and builds all the way to 125-130 psi then it blows off. If I apply the brakes until the low pressure alarm sounds it does not and has not started building air pressure back up. I can hit the brakes all the way to 10npsi until it starts to build pressure.

I have replaced my air governor and it looks like the p.o. did as well however it still does not build air pressure after initial build up.

Any ideas on what it could be? I am replaced my air governor and took off my unloader valves and lubed them, still same problem.

Any help appreciated.

 

[jtlynch74]

Fixed my problem exhaust port on air governor was plugged and should not have been. A d2 governor there is a thorough YouTube video on it and explained what to look out for.
Sorry for wasting the Internet we sites time and data hope you have a good day. Will talk to you all soon

Don't know how to delete.

 

[BamaBus]

No need to delete since it will help someone else. I had the same issue when I picked up a bus from a school shop. Took months to figure it out(Thanks Kyle!).

 

[Hooker-SKO]

Governor is clogged or stuck. Likely clogged since it's not winter time.

EDIT: Doh, I should have read the next response. Good you got it fixed. Yep, I'd leave the thread. It's short ands sweet to the point. Some others will be here for the same problem. It's fairly common.

 

[jtlynch74]

Watched this video prior but did not think to check the exhaust port. Then had to watch again after new install and fixed this issues.

Thankyou all, have a good day! First post and feel welcome already.

 

[ewo1]

No need to delete since it will help someone else. I had the same issue when I picked up a bus from a school shop. Took months to figure it out(Thanks Kyle!).

I second the motion !!

rally quick help and got it fixed it time saving to readers, flushes out the blah, blah, blah....

Good job on getting it fixed so quickly!

 

[kodiak_jack]

Fixed my problem exhaust port on air governor was plugged and should not have been. A d2 governor there is a thorough YouTube video on it and explained what to look out for.
Sorry for wasting the Internet we sites time and data hope you have a good day. Will talk to you all soon

Don't know how to delete.

this is how we learn

 

[s2mikon]

I had the same problem. Twice. The leaf roller bees look for air lines to plug up. That's their job. They got my governor and then later my maxi brake release. Here is how you fix it. get some of these in 1/8, 1/4 or 3/8" Amazon.com

 

[Bjorkinman]

Glad someone revived this. Now I have one more small tidbit of knowledge for the road!

 

[nikitis]

One of my dual air channels seems to build up slower than the other since I bought it. May have a small leak, but currently once they both it 120 PSI, it seems to stay there no problem. I'm watching it carefully to see if it drops ever beyond me just hitting the brakes and so far it hasn't.