What is this?

yeah, i just saw your new thread with the picture.

 

Had the same on my 1981 IH cabover. Worked great on it. When moving it let enough air through cab heater i didn't have to run the heater fan. On not real cold days. Of course inlet was on the front of the cab so...oh and the actuator motor never quit. Just operate it yourself, like a crank window.

 

i always got hot air.

 

Hmm mayby wasn't moving the door inside? Don't know. Think conventional IH had inlet on left with a small air scoop. Don't know how functional they were. On the front ,the old cabinover pushed some wind lol.

 

i too had a 1980's cabovers, some were IH, some were freight shakers.

hated them to hell.

first time i got into a hood, i never went back, and down right refused jobs that had them.

 

Meant to say on the right..not left...the other left.

 

maybe just didn't work right. i do recall some so easy to pull out, it came out in my hand.

some were so hard to pull out, i left them alone.