Join Date: Jul 2008
Location: Railton, Tasmania, Australia
Re: More FD Damage Pic's
In the case of the crown wheel 61917 c3 ball bearing failure, it is the shimming process which sets the correct amount of preload for the taper roller bearing on the oposing end of the bevel gear carrier. That preload must not be too great as, in this compact gear drive arrangement, a ball bearing has been employed to carry the radial load, but ball bearings are not designed to sustain high side loads. The is also a required set-up procedure for to ensure correct pinion to gear meshing. This must be done whenever pinion bearings or the taper roller bearing on the bevel gear are replaced, There are literally dozens of posts on this site about the failures and set-up procedures, including video clips etc.
1987 Yamaha TY250R
1991 Aprilia Climber 280
1988 K100RT (the pack horse)
2005 K1200LTE Light yellow metallic