[radix2]

Just so happens there is a complete parts manual for the MD-70 posted online here :

http://www.vertek.ara.com/products/PDF_Files/md70_parts_man.pdf

in case you want to look at the the parts drawings/numbers for that model

what RPM where you running when you felt the lack of power ? you should not have any problem climbing grades that are far too scarey to consider.

replacement items should be limited to idler wheels, sprocket rollers and the tracks themselves.