I have one of these Dresser / Komatsu D39 dozers. I like the machine well for what I do, but wanting opinions and advice on things to look out for on this machine. It has 3200hrs. I just put a set of rails and drive sprockets on. One thing the high idle rpm seem a little low , have not checked with a tool yet. Also what is a fair rate for this machine , I am charging 80$ per hour , 4 hour minimum and a 1 hour drop fee , so its actually 3 hours run time. I had a D6H , around here there is not enough work , and people are running them for 115$ per hour. I can't move as much material as fast but I am not starving paying fuel bill etc . Opinions wanted , thanks Djr.