Komatsu D37

mercredi 16 mai 2018

i recently ran a D37 for a few hours and had a few questions. I've been looking at these for sale and am confused on the series lettering. They are showing D37ex and D37px. Some also 21 and 21A. Just wondering what the differences are in these machines. I'm assuming one has something to do with long track or short track. Thanks

Komatsu D37