Hi peeps, me again :/
I changed my piston, piston head and cylinder head recently, and decided on trying to shim those gears as thy didn't seem quite perfectly shimmed by the factory to me. Plus, the shims used were quite small in diameter and some of them seemed to start to distort a bit.
So I bought a stainless shim set, and got going. I didn't get the result I really wanted to but it seemed acceptable. More details about this below.
So I reassembled the whole thing, plugged the battery and tested a single shot. At the first trigger press, the piston cycled half-way and started to get stuck. Second Trigger press, got to the back (fully cocked) and never budged from there. The motor probably started to force (duh) and I got the battery wire (the red one if memory's good) to go spark and "disconnect" from the solder near the Deans. Seems to have overheated in that part. Motor and battery are still good to go, by chance.
So I tried playing around a bit more and still no luck, same results.
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More details:
When I first got into the gearbox, and the gun was still good as new: The lowest gear (spur gear?), when all by itself was looking like it wanted to rub on the side of the GB's shell. If perfectly straight, no issues, but if I turn it by hand and tilt it just wee bit little, it rubs and jams. I'm not even sure if being able to tilt it by a degree or two (or three?) is normal or not.
When I close the shell with all gears in, and I turn the gears by hand, it doesn't seem to create that problem. But it's obvious that everything is not perfectly smooth.
What should be my next course of action? :/
I'm thinking abound grinding a bit of the shell to help, as a work around, but it won't really solve the real issue. Bad bushings maybe? Should it be really nice and tight or is it normal that there's some side play?
Thanks for your help
EDIT:
You can see a
quick video I made with the ORIGINAL Shims (that was before I change the piston and stuff)
When I remove the gear and put it back, I took the top shim and put it under to see if it would help. As you can see it worsened the problem.
Soorry for the bad lighting conditions