IF the gearbox is the same as the 701, then there should be a grease plug under the gearbox. You need to remove the large plastic trim underneath which goes around the carrousel, this is held by several phillips screws. Pull off the plastic knob at beneath the front of the mixer. The large plastic trim should now drop down, this has a piece of felt to catch grease and 20 years of grott. Here should be a penny size screw head. Undo and insert lubricant of choice. At your own risk of course!
Mr Bloggs, November 2007