Case 1835C With 3 Cylinder Diesel Engine Stuck After Sitting Up

I have a Case 1835C Uniloader Skidsteer with the 3 cylinder diesel and the engine is stuck after sitting up for 2 years. Does anyone have any tips on how to get it to turn over? The fully charged battery won't turn it. Is there a way to turn it mechanically to break it free?

Any help would be appreciated.

JW

Case 1835C With 3 Cylinder Diesel Engine Stuck After Sitting Up