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- New Truck Drivers: Get Help Here (https://www.classadrivers.com/forum/new-truck-drivers-get-help-here-102/)

- - What's the blue valve for? (https://www.classadrivers.com/forum/new-truck-drivers-get-help-here/29647-whats-blue-valve.html)

Mackman

09-16-2007 11:31 AM

i drove an 81 r-model mack with all 3

COLT	09-16-2007 12:09 PM

When bobtailing, the blue button is the only one that is functional.

The yellow one still works "Ace"

Part Time Dweller

09-16-2007 12:14 PM

Got me there Ace. :oops:

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