06 CM870 450 ISX egr tuneup

[DDlighttruck]

(09-29-2019 )Rawze Wrote:  CM870/air operated turbo only ...
if a person removed the air actuator from the turbo, then cranks the truck, they should be able to easily press the control arm down with one finger while engine is running (this should spool up the turbo). It should then gently float back up on its own to the top position as you let go of it.

If it stays down, does not float back towards the top most of the way back when u let go of it, hangs up in places, sticks at 100% down position, or is harder to move with engine running, the turbo is toast.

      
Top picture is all the way to the top.

Engine running, push all the way to the bottom, let go, that’s where it wants to stop on it’s journey back to the top

So my turbo is scrap, from what you’re saying...

Thanks for taking the time to walk me through this.