RE: [ihc] RE: Shifty Mandera, air brakes

[bearbvd@xxxxxxxxxxxxxx (Greg Hermann)]

At 9:54 AM 4/28/04, Jim Grammer wrote:
>>-----Original Message-----
>>From: Tom Mandera [mailto:tsm1@domain.elided]
>>Sent: Wednesday, April 28, 2004 8:18 AM
>>To: Jim Grammer
>>Cc: ihc@domain.elided
>>Subject: Re: [ihc] RE: Shifty Mandera, air brakes
>
>>I'm curious how the big-rig air brake compressors know when to cycle
>on/off.
>
>Good question. Electric clutch? Normally on? Constant duty with a bypass?
>Dave N? Greg?

I think most of them use an air pressure activated unloader (hold the
intake reeds open). Never seen one with an electric clutch.

Greg
>
>Jim