a/c system is okay, 60 degrees is as cold as they git, never did understand why couldn't have been 50 degrees, cab filters git dirty l/h side of machine behind platform going into cab, panel is easily removed for access, good luck, heck of machine, on a side note, on pro 600 monitor, don't recall whitch screen number 4or 5, will pull up engine, select, where is engine set at power rise or boost, select power rise, will give her max hp, scott.