12-17-2016, 04:04 PM
Problem solved. It is air pressure related.
Went back to the regulator by the 12v aux compressor and found out that the pressure was up at 80 psi when the 110V compressor would pump supplemental air into the system.
By itself the 12v compressor pumps to about 40 psi and shuts off.
Dialed the regulator down to 60 psi from 80 and checked the doors....no more knocking. Toilets are flushing fine. All mechanisms are tight. Air mufflers left untouched for moderate speeds on open and close.
I am still puzzled that one door was not knocking out of all 3....but...oh well....it is fine now.
Thank you all for the suggestions and help.
Went back to the regulator by the 12v aux compressor and found out that the pressure was up at 80 psi when the 110V compressor would pump supplemental air into the system.
By itself the 12v compressor pumps to about 40 psi and shuts off.
Dialed the regulator down to 60 psi from 80 and checked the doors....no more knocking. Toilets are flushing fine. All mechanisms are tight. Air mufflers left untouched for moderate speeds on open and close.
I am still puzzled that one door was not knocking out of all 3....but...oh well....it is fine now.
Thank you all for the suggestions and help.
MG