Air dyer, Compressor

[74bassman]

This morning, I found out the valve in the bottom of the air dyer stays open, and it seems like my Compressor is not shutting off. Pressure gets to a little over 120, and I hear it bleeding off the excess pressure down to about 100 psi. This happens a couple times a min. Any advice on where to start fixing this? Thanks

[snailexpress]

(12-19-2016 )74bassman Wrote:  This morning, I found out the valve in the bottom of the air dyer stays open, and it seems like my Compressor is not shutting off. Pressure gets to a little over 120, and I hear it bleeding off the excess pressure down to about 100 psi. This happens a couple times a min. Any advice on where to start fixing this? Thanks

Disconnect air line from compressor inject some air system antifreeze connect it and drive down the system.
Drain air tanks after. Governor and line to compressor need to check too.

[74bassman]

The air antifreeze will that clean out the system?

[in2trux]

While ice maybe be keeping it from seating, you may need to replace the purge valve.
About $90. The spring gets weak over time like everything else.
When was the last time you changed the drier cartridge?

[74bassman]

Right now I'm in Florida, I don't think ice is the problem. The whole dryer unit was replaced 1 1/2 years ago. Going down the road , and not using the brakes. Pressure builds to a little over 120, then bleeds down to just under 120.

[snailexpress]

(12-19-2016 )74bassman Wrote:  Right now I'm in Florida, I don't think ice is the problem. The whole dryer unit was replaced 1 1/2 years ago. Going down the road , and not using the brakes. Pressure builds to a little over 120, then bleeds down to just under 120.

didn't know you are warm.
Check governor

[74bassman]

Is there any test for the governor

[snailexpress]

(12-19-2016 )74bassman Wrote:  Is there any test for the governor

Less then $20 for governor and 15 min labor to replace is test.
125 PSI pressure is too high. Compressor unloader could be bad too.

[rgreen]

(12-19-2016 )snailexpress Wrote:  

(12-19-2016 )74bassman Wrote:  Is there any test for the governor

Less then $20 for governor and 15 min labor to replace is test.
125 PSI pressure is too high. Compressor unloader could be bad too.

Change your cartridge on your air dryer. If you have a bendix...They have online class and tech you about the air dryer and brake system & the best thing about its free
http://www.brake-school.com/public/