Looking for some thoughts on whether this is normal or not.
While running PTO at idle to blow off cement powder from a pneumatic tanker, my truck’s RPM fluctuates 10-15 rpm every 10 or so seconds. It both increases or decreases 10+ RPM from its setting of 1050rpm for a blip then settles back at 1050.
It is obviously very slight, but you can notice the surging. I don’t believe my previous truck and blower did this