Color me green:

What is this?

http://photos.ebizautos.com/5556/2994217_22.jpg

I understand term "isolation" in a incarcerated or Crusoe type of context, but I don't understand this. My best guess is that it's a pneumatic release or powering knob for a cab air ride system. If so, why is that not an intergral part of the cab suspension? Or is it that a cab ride is different depending on the load?

For whatever it's worth, this photo is one of a set for a used truck sale promo.
http://www.warnertrucks.com/detail-...lockers___caterpillar___18_speed-2994217.html

As long as I'm suffering from hoof-in-mouth disease, this truck is listed as having interior PTO control but no external PTO. I grew up on a farm, I know full well what a PTO is on a tractor and what we used them for, but I don't understand not having a external gear or something to mount a PTO powered gizmo to- like a bush hog or spray rig pump or whatever. Did this originally come with an external PTO gear spline? What could you run with it on this truck? A hydraulic pump for a dump, wrecker or tow boom or something else?

Thanks

 

Ahhhhh, I see. I thought it was... well... not at all what you explained it to be. Thanks for your input.

As to the PTO, I understand that too now. It came with one originally or at least had one at one time. Thanks again for your response.

 

I agree, though you could put all that I know about this stuff in a single sentence. That said, man that locker system in the headache rack sure looks like it would be a nice feature. They don't look very deep though. This same company had another Western Star for sale a few months back on E-bay. (Friggin beautiful!) I was trying to find it again. Not that I can afford or could make use of one. I jsut needed a good drool session I guess.

Be safe.