deserterghost

Now that I spent long hours trying to solve the problem, I realised I'll need to buy new piston and bushes anyway, because they are made of plastic and are damaged. If inserting these parts (which is needed anyway) won't help, I'm pretty sure it's the fault of the motor, because the wires and other parts seem to be fine. And also it's my personal perversion to repair this myself But your advice is of course the most logical step and you're right.

Yeah you're probably right. This seems to be logical After reading (probably) every single forum post about this, yes I have tried the motor at every possible level. It didn't change a thing. Not even the sound of it. Well it seems like I'll have to spend more money on this. Can I go ahead and buy a cheap motor? Or does the price matter? Thank you for all the effort put into solving my problem!

Update: I managed to manually fire with the gearbox. I don't know if it's normal but I could barely do it through the bottom hole with a screwdriver. Does this mean that the problem is not with the shimming/gears/bushing/piston but with the battery or the motor? My battery is 8,4V 1600mAh. And I still don't understand why sometimes the motor could manage to pull up the spring. After I manually fired the gearbox and attached the motor, it could fire perfectly in full auto until I released the trigger. When I pulled the trigger again it failed and the piston got stuck halfway again.

I cleaned every part of the switch but the piston still stops halfway. Nothing changed. How is it that a few times it could actually shoot about 3 rounds if I released the anti reversal latch? I mean the motor should be good enough if it could do the work sometimes. Anyway I hope this is all about those cheap plastic parts... I'll order a new piston and bushes. Any kind of piston should fit in this gearbox that has 14 teeth or are there any other specifics?

Thanks for the tip, but the shipping would cost 8 euros and the gearboxes are too expensive on this webpage. It would even be cheaper (or the same price) to buy every single part separately. I checked for gearboxes in my country but I couldn't really find this type. I'll check the trigger contacts. Although I don't know what it should look like. I hope I'll figure it out. By the way I have 7mm bushings. (if it's the diameter of the smaller hole and not the diameter of the 'nail head') And thanks for the advices again. You have already helped more than the other forums altogether!

Chock, thank your for the advice, but I live in Hungary and shipping costs loads of money unfortunately. Otherwise it's not a bad idea to get a whole new gearbox. By the way... can a motor suddenly become not strong enough? I mean I barely used the gun. Please say that it's all just the fault of the low-end plastic piston and bushings!

About 5 years ago I bought a relatively cheap DBoys KLS RK-01 (AKS74U) gun and after a few years it stopped working. It had a clicking noise and it didn't shoot. I bought a better battery but it didn't really solve the problem. I disassembled the gearbox and saw that one of the plastic bushings was broken. I also saw that the piston's plastic teeth were a bit damaged but it didn't seem very serious. (just a little plastic peeled off) I replaced the broken bushing with a modified lego (yes, LEGO) piece and it really worked like it was just a normal bushing. (I didn't want to waste money yet) I removed the spring and the mechanics worked perfectly. With the spring the motor can only rarely shoot about three rounds when I manually release the anti reversal latch. Except the battery every single part is the original one just as it came out of the factory, and only the mentioned parts seem to be damaged (piston and bushes). My questions are the following: - Could the motor become suddenly not strong enough, even though I barely shot a hundred rounds? - Should I buy a new motor, or is it possible that I just need a new piston or something like that? (I will buy new, metal bushes, but I want to order everything at once.) Sorry for the long text but I tried to be as accurate as possible.