RaggedyMan
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- Location
- Lynchburg Va
I have been searching for the last hour and I know it's been asked a dozen times but it seems there has been no "final" answer (or more likely I missed it). All I found in the TM's were exploded views but nothing about how all this is supposed to work.
First I guess I should say this is a 65 M35A2C. There is an air manifold under the dash that connects electrically to the low pressure light/buzzer and air lines to/from whatever else. On the right side is a small hole that air constantly escapes. I read during my search that some say to plug it but when I press my finger over it the low pressure buzzer sounds and the light lights even though the pressure is between 90 & 120. This air loss doesn't affect the gauge pressure or interfere with any air operated items. The air continues to come out after I shut it down for a while and when it stops (or maybe I just can't hear it) there is still some pressure in the tanks. I can live with the hiss but I understand it can't be good on the compressor. I disassembled the govenor (engine side of the firewall) and cleaned it but nothing.
Does this "manifold" have working parts inside? Is this hole an evacuation for over pressure? Do I need to adjust the govenor even if the pressures are within limits? Is there something in/on the compressor I need to check?
First I guess I should say this is a 65 M35A2C. There is an air manifold under the dash that connects electrically to the low pressure light/buzzer and air lines to/from whatever else. On the right side is a small hole that air constantly escapes. I read during my search that some say to plug it but when I press my finger over it the low pressure buzzer sounds and the light lights even though the pressure is between 90 & 120. This air loss doesn't affect the gauge pressure or interfere with any air operated items. The air continues to come out after I shut it down for a while and when it stops (or maybe I just can't hear it) there is still some pressure in the tanks. I can live with the hiss but I understand it can't be good on the compressor. I disassembled the govenor (engine side of the firewall) and cleaned it but nothing.
Does this "manifold" have working parts inside? Is this hole an evacuation for over pressure? Do I need to adjust the govenor even if the pressures are within limits? Is there something in/on the compressor I need to check?