Long story ... Long. Since I didn’t have a backup powerchair at that time, the gearbox was assembled back and I waited until I received the bearings. Now it was the turn to completely rebuild the gearbox. I thought so...
Disassembling the gearbox for the first time I saw the two bearings on the gears and decided that on the other side are the same. And that's all I need.
That was a mistake. Having knocked out the first large gear (with the axle), on the other side there appeared a bearing of larger diameter. Furtherm it turned out that it was impossible to pull out the second axis with the gear without removing the worm. But you can pull out the worm only if you unscrew the gearbox from the motor:
Unscrewing it with great effort - it was not fixed, but there was a small hexagon. And there were only two such bolts on both sides:
It is curious that on the motor itself there are eight holes (only two are used):
The worm was free!
On it was another oil seal and bearing. Removing the worm, the gearbox was completely disassembled. While I was waiting for additional bearings and oil seal, I decided to unscrew the second gearbox.
And here there was a big problem. The bolts holding the gearbox have a strength class of 10.9, and they have a small hex. In this case, it is difficult to use the powerful tool, as the gearbox cover is in the way. I was lucky with the first motor, but no luck with the second.
In short, the hex on the cap was torn off. And now need to figure out how to unscrew this bolt (second photo above, but another side).There are a few ideas on how to unscrew it:
1. Drive the torx key into it and unscrew it. This is dangerous, I think.
2. Drill out a bolt with a long bit - more than 170 mm. because it prevents the closed part of the gearbox. There is a risk not to pull it out completely.
3. Take a metal plate, drill a hole the size of a bolt in it, and weld the plate to the bolt. Unscrew the plate with the bolt.
Six openings threaded on the motor make it possible to screw an additional bolt. But in any case, after the gearbox is unscrewed.
Any idea how to do this?The adventure will continue...