4200 XL shear pin repair

[Jack3M]

Now you can remove the sprocket assembly from the motor, do not loose the O-ring. Also this is opportunity to grease the bearing with good waterproof grease. Picture shows the sprocket off. BUT if you look closely, there is an Allen wrench going through the very center of the unit.


This connects the motor output shaft to the drive sprocket. In many cases this will be enough to resolve the issue, I assume, lining up the hole and assembly I will describe a bit later as there is one not of importance.

[Jack3M]

You can see the hole in the output shaft in this photo.


But I noticed the gearbox was loose and decided to try to fix it. I had to remove 3 sets of gears to allow me to get to the 3 screws that hold the case and motor together. These screws got locktite.





https://picasaweb.google.com/1064737...85071549820722

https://picasaweb.google.com/1064737...85957591941298

[Jack3M]

Of note, I made a new shear pin out of a piece of mild steel I had. Not sure how hard it should be, not hard to fix this really. If just the shear, you don't even need to remove the motor actually.

But to line it up was difficult, and I learned that by loosening the 4 set screws for holding the motor and pulling the motor out toward the cap a bit, made it much easier to get the new pin lined up and in place. Put the keeper set screws back in. Then push down hard toward the O-Ring so that it seals the whole unit from the environment.

So, my benefit from all this is I saved a bunch of cash after having just gotten this. Also, that unit is not a bad piece of work, all the gears are metal. I just increased the amount of grease on stuff. Albeit slow, these units are pretty sneaky smart.