I would suggest using at least 2 screws everytime you close the gearbox when checking the shimming (the one at the bottom of the gearbox in front of the motor and the second one from the back at the top of the gearbox).
There are faster technics than others, but the only thing that counts is the end result. Also putting the gearbox back together properly (including the right end of the sring over the spring guide) is very important. Again, it all comes down to experience.
Quote:
Originally Posted by Jimski
Hello all,
here is my shimming technique, can you guys comment on it and tell me if it's any good?
Recently I added torque ups on my Aug.
So what I did is
1.take the mechbox apart, remove everything.
2.put on the metal bushings.
3.put on the torque-ups with no shim, close the gearbox.
(no screw, only the metal plate on top)
4.pinch each gear between my thumb and index ( on the exterior of the bushings then) and move it from side to side to have an idea of how much it moves - I begin with the sector gear.
5.take the mechbox apart and add shims:
large diameter for shim-to-bushing contact, small diameter for shim-to-gear contact.
I add thickness one side at a time, trying to:
-keep the sector gear centered
-keep the spur gear aligned with bevel and sector gears
(this usally means as low as possible)
-keep the bevel gear centered and rotating easily.
(this usually means thin shims but I guess it depends of the gear measurements)
close the box - check that it seals properly.
tell me!
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