You will need to use a specialty tool in order to install the new bearing, the main drive gear, and even the main bearing seal. Both pieces can be easily tapped out with a plastic hammer or a brass drift. The fitment if the remaining bearing and race is not very tight. Now, it is possible to remove the remaining half of the Harley main drive gear bearing. The rounded, concave side faces away from the bearing. Note that the flat side of the clip faces the bearing. Pry off the main bearing seal and remove the bearings’ retaining clip. The JlMS tool comes with a collar (A) that threads on the end of the mainshaft and a socket (B) that slides over the collar and fits over the sprocket nut and has a 1/2-inch square drive opening in the other end. Then, slide a new o-ring over the gear and set it aside ready for reinstallation. A good investment is a JIMS Machine sprocket nut socket (CCI PN 20691), that will work on any 4-speed transmission from 1936-86. The Harley 6 speed transmission is excellent, but the main drive gear bearing is a double roller bearing that is prone to premature failure. Remove the main drive gear inner seal (or, mainshaft seal) and replace.
Mike shows us how to clamp onto the race and press it off with a hydraulic press. There are a number of ways that this race can be removed. Typically, this gear will be reused unless it is broken or damaged as it is very expensive to replace. Reuse Or Replace Harley Main Drive Gear Bearing This race needs to be removed if you are to reuse the original main drive gear. When the main drive gear is in your hand, you will notice that one of the bearing’s inner races has remained on the gear. The Harley main drive gear bearing will begin to break apart as you remove the gear. Harley Davidson transmission pulley holding tool Sprocket nut pulley removal and replacement 1 7/8 impact socket to go over output shafts for all tool transm. It is good to spray the gear with a little lube before attempting to remove. The tool pulls the gear through the main drive gear bearings’ inner race. To remove this gear, a specialty tool is needed. Speciality ToolĪt this point, the main drive gear needs to be removed.
If you have dismantled your Harley six speed transmission to this point, it is probably because you need to replace your Harley main drive gear bearing (sixth gear). Articles on Harley-Davidson How-to and More Be sure to use a sprocket locking tool when removing or installing the Sprocket Nut : Year 883 Model(s) Transmission Sprocket Rear Wheel Sprocket Secondary Drive Belt Ratio 1991-1992: 883 & 883 Hug (chain) 14) 21 Teeth: 48 Teeth: Chain driven: 2.