Galaxy MP5

Popanddrop

Hi,
I purchased a Galaxy Mp5 today, i brought it home and charged the battery for a short while, it fired one shot and went dead, i charged the battery again and it wouldnt work in the gun, I put it in my friends gun and it worked fine. the Mp5 dosent even make a sound, Anyone might know whats wrong?

NakedDex

Could be a blown fuse. Follow the battery connector back a bit and you'll find the fuse casing, pop it open and see if it's still connecting (it's glass so you can see clearly if the wire in the center of it is broken or not.

Popanddrop

Do I have to take off the body to get to the whole fuse box?

Masada

just the front handle where you connect the battery terminals. theres a little black capsule looking thing and it clips open to reveal the fuse inside, the real issue is why the fuse has blown if it has done, .,

Popanddrop

Ya the fuse did blow, I will replace it with a higher Amp one maybe 30amp instead of 20amp, what do you think?

defenderdude

Popanddrop wrote: »

Ya the fuse did blow, I will replace it with a higher Amp one maybe 30amp instead of 20amp, what do you think?

Just be careful that you didnt damage the wiring when you were installing the battery. It's very tight. May have caused the fuse to blow...?
I just put a new battery into my mp5k this evening and I was half expecting to do damage it was so tight. Works perfect tho:)
spray and pray tomorrow!:D

Masada

try it out and see what happens, it might just have been a bogey fuse but if it does it again then theres something more complicated wrong with it.,

defenderdude wrote:

Just be careful that you didnt damage the wiring when you were installing the battery. It's very tight. May have caused the fuse to blow...?
I just put a new battery into my mp5k this evening and I was half expecting to do damage it was so tight. Works perfect tho
spray and pray tomorrow!

Yeah isnt it terrible the way they designed them, I hated trying to get the battery in mine so i never really use it now.,lol.,:D

Popanddrop

I took out another fuse from a CYMA Ak-74 it was the same amp but nearly blew, so i think a higher amp would be best, the wires are perfect no damage, i checked, if you find taking the battery out hard then just leave it in and take off the front grip instead.:)

NakedDex

Don't put a higher ampage fuse in. It's blowing for a reason and the fuse is there to stop something more catastophic from happening. If you put in a higher current fuse you run the risk of frying the motor and/or cables. I'd say have it looked at first. Break it down yourself if you can, see if any cables are touching, frayed ends, bad earths etc.

Popanddrop

But how would a higher amp fry the motor and fuse is there to stop over charges it dosent matter what one it is?

Masada

the fuse is designed to break as the weakest link in the chain and if you strenghten it then it could mean that your pushing the problem further on down.,

Popanddrop

what about if I just went up a few amps like to 25 amps

Masada

lol, if there wasnt a problem then any fuse would make it fire, your wasting your time upping the Amps of the fuse., you could try removing the motor from the handgrip and then fire it with the motor on the table, that way you'll know if its the gears that ar jammed.,

NakedDex

The fuse is there as a break point. It's usually an amp under safe working current. It's current that kills things, voltage isn't so much of a factor. An 8.6v motor can feasibly run up to 12v, somtimes 15v (you're gearbox most likely will not take those though). The current however is very sensitive. AEG's pull high currents for very short spaces of time (fractions of a second per shot). Unlike voltage, motors have very little leway when it comes to current. Half an amp too much could fry the motor if it's sensitive enough. It's POSSIBLE you'd get away with it. But for the sake of opening it up and looking for a reason why it's happening you'd be risking your entire AEG as well as possibly endangering yourself.
I've seen motors get a couple of amps too much in the past, not just on airsoft models. Most of them smoked out (over heated and died), one sparked quite wildly then died and another one actually caught fire and fused several dozen of it's windings.


Please be careful with electrical current

Popanddrop

I will take you r advice into consideration and open it up, thanks for the advice and I will reply back with a report

Masada

have a look on www.mechbox.com for instructions on disassembling your gun,.

Popanddrop

I took apart the MP5 today, i couldnt get the top piece off that is over the main body where the battery is located. I put in new fuse and tried it again, it worked but then made a grinding noise, anyone know the problem?

Masada

sounds like your gears man, you dont need to remove that top piece as far as i can remember,

Popanddrop

what do you think I should do?

Masada

i reckon its gonna need to be stripped before any conclusion can be made., if your at HRTA anytime soon look me up and ill check it out for ya.,

kdouglas

top piece over the main battery? im not particularly sure what you mean by this? is it where the cocking handle is?

once you remove all the screws, the front section should just slide forward away from the receiver

Popanddrop

vtec wrote: »

i reckon its gonna need to be stripped before any conclusion can be made., if your at HRTA anytime soon look me up and ill check it out for ya.,

Hey problem is that I live in Cork:(, so does anyone know where I could get it looked at, and for kdouglas` comment , it wouldnt slide off, im sure i removed all screws, if I could just get the body apart I know how to strip the rest after that.

Masada

did you look on mechbox? or youtube? its not really a hard one to strip.,

Popanddrop

if you read above I had trouble dismantling it

NakedDex

Did you put in a higher ampage fuse. Given that you said it wouldn't work at all, then when you replaced the fuse you ended up with a grinding noise I would assume you did.

Also it doesn't sound like you're putting much effort into troubleshooting, courtesy google search turned up thousands of hits.
http://www.youtube.com/watch?v=uCLhA-n0wL8

Popanddrop

No i didnt put in a higher amp fuse I only put in the exact same one but brand new

NakedDex

Did it blow? Was it Time Delay or Quick Blow? Was the original one Time Delay or Quick Blow?

Masada

there ya go man, if that cant help ya nothing can.,lol


this is for striping the gun,

this is for striping the gearbox,

https://www.youtube.com/watch?v=R__kLzsNPAY

iceage

Hey man, I own a Galaxy mp5k, if you bought it Cork, return it to the shop where you bought it and ask for a replacement or refund, be wary bought stripping the bollix out of it and trying to bring back a box of bits an pieces!

All the mp5/mp5k/mp5 pdw have issues but not a lot of them blow fuses unless the wiring has shorted internally on the body/reciever. Take it back to THAT shop, i'm guessing thats where it came from, best of luck..:D

Popanddrop

Lads thank you for all the replies, ye have all been a huge help, unfortunetly I havent tried it yet due to me not being able to find them in stores, anyone have any idea on where to get them in Cork, Im looking for a glass 20amp fuse, by the way thanks to shiva who siad he will post me down 1 or 2, but I am going to need places to get fuses for the future, i tried 10 electrical stores today and none had them.

NakedDex

Maplin have a store in cork you should be able to get them in.

Popanddrop

thanks for that is that the Maplin out by blackpool

NakedDex

That's the one.

Popanddrop

Great, i was also in the motor shop in Merchants quey today, if anyone for cork is wondering, they also sell 20amp fuses but are currently out of stock.:(

Popanddrop

just for those who live in cork, apparently the motorshop in douglas court shopping centre has 20amp fuses, i know these can be hard to find in cork, I am going there tomarrow so I will keep you updated.

Masada

just go to a car accessory shot and buy a blade type fuse and holder. then you just replace the fuse type you have with car type fuses and never have any trouble finding fuses again,.:)

Popanddrop

Hi i just popped in the new fuses into one of my MP5`s it works now and the reason it blew was that the gears in the gearbox were not alighned correctly, but now that it is working and back together it`s only firing 1 out 7 times or so that i pull the trigger the same on auto, and when it does fire there is no power and the bb drops about 10feet away.
Any ideas?:(

chalky

When you put the gearbox back together (I assume you took it apart to realign the gears) Did you make sure the nozzle was properly connected to the tappet plate? The nozzle should slide in to a groove on the tappet plate so it moves back and forth with it.
If its not in properly, it won't feed in the bbs properly, and when there is one in, the nozzle won't make a good seal around the bb so it'll just barely push it out the barrel
I did this with my M4, and I couldn't figure out what was wrong. I even tried a new hopup. Had to get KD to fix it in the end

Popanddrop

thanks for that, when I took it apart the first time the spring from the trigger came out, it cant find any videos or instructions on how to put it back it, do you know how?

chalky

go to mechbox.com
There's a video there called "Version 2 mechbox upgrade video". At about 5min 30sec in, he shows how to reinstall the trigger on the V2 mechbox. I don't know what mechbox is in the MP5, but I assume installing the trigger would be fairly similar

Popanddrop

I have a version 3 gearbox

chalky

I think thats very similar to v2
Here's the video anyway
http://www.mechbox.com/site/mechbox-upgrades/version-2-mechbox-upgrade-video.html

Popanddrop

the trigger placement is totally different

chalky

Oh, sorry about that. I've never had a look inside a v3 gearbox, so I'm afraid I can't help you.

Masada

i know exactly what you mean about the trigger, it doesnt stay in the gearbox when you open it like a lot of other versions. you need to put the trigger and spring back in and hold it strongly while puting the box back together or it just keeps jumping out. as for the other problem, id say chalky is spot on with the cause.,

Popanddrop

ok i have a new problem the gearbox works but for some reason when i put in the motor it made a grinding noise, any help? AGAIN

Masada

could be anything really seeing as youve had it dismantled. it could be the gear timig for the motor alignment or a fe other things.

Popanddrop

everytime i fix one problem something else goes wrong

johnboyire

dont give up, that mech box site is great make sure you use it as they sometimes have re-assembly videos too,

just a tip that might help - get a digital camera ideally (so you can zoom in on specific parts) and take pics as you dissasemble so then you can see if anything is different when your putting the gearbox/gun back together

I did this and it definitly helps

Popanddrop

I have another problem , the gearbox is working perfectly but the when I put the motor into the handle its starts making a grinding noise when it enters into the gearbox, and nothing will move, need help?:o

Masada

theres a large screw in the bottom of the handle, did you remove that? if you did then the motor might not be lined up correctly, loosen that screw a bit and then try it. the ides to the screw is by tightening it you push the motor further into the box and loosening it pulls it out a little, its for lining up the gears correctly.,