MP5 grinding and not moving

[GrammarNazi75]

Back with another problem unfortunately :/

Having a problem with my MP5 gearbox at the moment. I have loosened and tightened the motor but it either grinds or when it's tighter doesn't cycle at all, you can just hear it move slightly.

I was just wondering if anyone has any idea of what the problem could be.

All advice is appreciated.

[Montesa77]

Re: MP5 grinding and not moving

Was it running before? Flat battery? Seized GB? Is it just a click?





P.S. Did you send out my stuff today?

[GrammarNazi75]

Re: MP5 grinding and not moving

Bought it in pieces from a mate and it worked fine. I think it just locked up a minute ago now im putting a non bearing spring guide in to see if it closes easier.

[Montesa77]

Re: MP5 grinding and not moving

Did you over shim it?

[GrammarNazi75]

Re: MP5 grinding and not moving

haven't changed anything at all about it

[Montesa77]

Re: MP5 grinding and not moving

Sounds like a stripped gear, have you got a video? Have you sent my items out yet?

[GrammarNazi75]

Re: MP5 grinding and not moving

don't have a video. By the time i got to post office it was closed at 3, so will do tomorrow morning

[Montesa77]

Re: MP5 grinding and not moving

Sounds like you will just have to open it up then!

[helpimonfire]

Re: MP5 grinding and not moving

Check the piston hasn't been damaged. My M4 ruined 2 pistons and it sounded like the motor had dropped, but it was just stripping the piston instead.