I dug out 2 water maple stumps yesterday with a 416C Cat. Yeah it seems pretty hard on the machine. It does seem if you get a hole started you can pull thru the roots a little easier. A 3 foot stump is pretty sizable. If you have several to pull I would rent an excavator for a day yank em and send it back or hire an excavator someone may be glad to get a days work. Then dress up with your equipment. I pull stumps with my backhoe but I really don't like to.