CK2620 only going to 1800 RPM

[toukow]

Hi, new to tractors and not a mechanical guru by any means. My 2022 CK2620 at full throttle only goes to about 1800 RPM. I’ve only got just over 50 hours on it. Seems like everything works well but I’m guessing these tractors should be able to get up beyond 3k rpm? The throttle cable was a bit loose ( a lot of play before the throttle started moving) and that was easy to fix but didn’t solve the issue. Looks like there are set screws that have wire through them at the plate the cable moves (governor plate?). One appears to be for idle and the other for full throttle. Does that set screw need to be adjusted? I’ve already changed the fuel filter with no change in idle speed. I’m not a heavy user and mostly have just used it to pull logs, front loader work and decent amount of backhoe work.
Appreciate any insight/guidance.

Obviously, if you have a tach problem, it’s explained. I did want to add another data point though.

My CK2610 has done this twice. Wouldn’t go to above 1800 RPM, and it would bog down under load. I took a WAG and for once was rewarded by replacing the air filter. It fixed the problem. Second time it occurred, I cleaned the air filter, observing the manuals statement to not exceed 30 PSI using compressed air. Again, it fixed it.

Doesn’t make sense to me, as the air filters were under the recommended hours, and did not seem that dirty. Anyway, even I can’t argue with success, so thought I’d mention it. For what it worth, Toukow