Air brakes.Yellow and red knobs on Ford l8000 dump truck. Which knob to push in to drive?

Ejector seat? Whiskey dispenser? Lot lizard repellent device? Nitrous?

 

Lol oh boy. That's old school.

 

The Blue Knob Club I am.

He he he.

 

It's the air supply for the flux capacitor, which will set off the Continuim transfunctioner, launching the operator into warp speed and into a galaxy far, far away....

 

And even more don’t know they were usually round, sometimes white and sometimes just a brass stem with a ring on it sticking out of the dash.

 

The blue knob resets everything to original factory specs.

 

And what if one had NO Knobs, just a foot treadle, hand valve, and pipe plumbing cut off valves
to the air lines???? Weird...

 

Im gonna check with the shop here at the TA and see if they can install a blue knob in my truck.

 

Mine was black.

Pushed it in. Hisssss. hmm... let's go find it. Aha.

 

TEACHING is still active in some places, LEARNING went idle years ago... It seems.