CYMA mp5 blue edition problems

[Colin Allen]

Does the fuse have a case that protects it?

 

[Rickwales]

Well, the metal ball is not from a bearing anyway; it has bushings, Could those two cut wires have been touching anything? If not, you will probably need to open it up and see if you can see a problem (Blown mosfet, gears too tight, obvious damage); before doing that, maybe try the motor in another gun to make sure it is ok.

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The 2 cut wires were isolated and the power turned off thru the mosfet.

 

[Rickwales]

Does the fuse have a case that protects it?

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Yes.

Does the fuse have a case that protects it?

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Yes.

 

[Colin Allen]

Then you are into fault finding mode; it is worth checking the motor in another gun in case it is the problem. However, without being able to see everything in detail, my money might well be on the Jefftron.

 

[Rickwales]

Then you are into fault finding mode; it is worth checking the motor in another gun in case it is the problem. However, without being able to see everything in detail, my money might well be on the Jefftron.

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I've kinda reached the limits of my skills... I've put it away for now. I only got it out to check it before I sold it. Trying to find a new house purchase. Can't sell it unless it's a 100% and it obviously isn't. Shame. Sold my krinkov and my HK. Just the tac41 to go. I'm keeping the rest.
Really appreciate your assistance with this.
Rick

 

[Cannonfodder]

I'd say the little metal ball bearing is from the fire selector

If it's firing in full auto no matter where the selector is then it could be he selector plate

 

[MrTea]

I'd say the little metal ball bearing is from the fire selector

If it's firing in full auto no matter where the selector is then it could be he selector plate

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I could be wrong but I thought (from the factory) the MP5 selectors don't use a ball-bearing rather it's like a little metal cap with a short spike that sits in the detents for the fire selector positions - see pic. That said if it's second hand and someone has lost this cap, they could have replaced it with a ball-bearing.

 

[Rickwales]

I could be wrong but I thought (from the factory) the MP5 selectors don't use a ball-bearing rather it's like a little metal cap with a short spike that sits in the detents for the fire selector positions - see pic. That said if it's second hand and someone has lost this cap, they could have replaced it with a ball-bearing.

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Thats what mine looks like didn't have a spring in it tho.

 

[MrTea]

Thats what mine look s little, didn't have a spring in it tho.

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So it's not from the fire selector then. Interesting.

The spring just makes it have a bit of resistance when it's in position IIRC - you can replace the spring with almost any spring and it'll be fine as long as it's not too strong - just makes it a little fiddly when reassembling the fire selectors.

 

[Rickwales]

I'd say the little metal ball bearing is from the fire selector

If it's firing in full auto no matter where the selector is then it could be he selector plate

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It could have been in the floor a while, it's my gun room and I work on all my guns on the floor. Crosman airguns have a BB like that inside the safety catch. I was using a head torch and it caught my eyes. I don't hoover in there often...