Just wondering what this is, the small silver can in the middle
. Another shot
Looks like the air compressor governor. It is the governor after looking at your second pic.
So, engine aircompressor governor?
Tells the air compressor when to turn on and off
Called a D-2,can be had at truck parts stores and Ebay,$20 and up,good idea to have a spare,many posts on the forum about
replacing.
D-2 poop sheet:
http://www.plazafleetparts.com/uploads/2/1/9/0/2190100/d-2_governor_maintenance.pdf
Excellent. Ill get one. Thanks