Dirt Moving Losing power and smoking

[docone]

I have a 2012 MX5100 HST (900 + hours) and while using it to move sand( trenching a frost wall) it started losing power and smoking from the exhaust pipe. It still runs smoothly until I start to load it up. I usually run between 2000 and 2200 RPM when using the loader. I'm thinking maybe injector plugging up or valve train adjustment.
Anybody out there have experience with this type of issue?

Any guidance would be appreciated.

 

[ptsg]

Have you checked the air filter and fuel filters?

 

[dodge man]

I agree, start with fuel and air filters.

 

[Shawn T. W.]

What color "smoke"?

White? Blue? Black?

Purple?

 

[greenie]

I overfilled the crankcase with oil once - it idled fine but under a load it smoked and lost power.