V2 gearbox jamming at same point each time.

[bobfish]

Hey all
noob to forum but not to fixing things so I think I should be able to fix this if told what on earth is wrong with it.

The motor pulls the piston back to around 3/4 of the way then it stops (same place each time) then when the trigger is pressed the motor tries to spin but doesn't move (you can hear the click as it pushes against the pinion gear), the wiring gets really hot at this point.

Then after removing motor and manually rotating the gears with a screwdriver the piston goes all the way back then releases. To start again.

The motor spins perfectly when outside of the gearbox.

The batteries are fully charged, things are greased quite nicely. Also I goof'd around with the shims may not have put them back correctly as they flew everywhere first time I opened it after it jammed, any tips on re-shimming? I think I have done them correctly but what are you primarily looking for? (that the gears mech tightly obviously but anything else?)

ty in advance.

[BALBOSA]

Re: V2 gearbox jamming at same point each time.

sounds like shimming issues matey have a look on youtube there's some pretty comprehensive guides on there

[bobfish]

Re: V2 gearbox jamming at same point each time.

sounds like shimming issues matey have a look on youtube there's some pretty comprehensive guides on there

cheers I'll check them out, but assuming it's not shimming as I think I did an adequate job with that what else could cause it?

I did have problems with the trigger mech ... could the connections be worn on that causing it to have a weak connection?

[Gaffa]

Re: V2 gearbox jamming at same point each time.

Check if ANY of the teeth of any of the gears is missing.

The gear axle may be bent, that could be problematic.

[richardy]

Re: V2 gearbox jamming at same point each time.

ya, if its stopping at 3/4s its becuase resistance is too high for it to turn the gearbox fully.

Take out the cylinder set and reassemble without that, then see if and how fast the gears rotate on there own. a clear and surefire way to see if your shimming is any good. listen and watch.

[bobfish]

Re: V2 gearbox jamming at same point each time.

ya, if its stopping at 3/4s its becuase resistance is too high for it to turn the gearbox fully.

Take out the cylinder set and reassemble without that, then see if and how fast the gears rotate on there own. a clear and surefire way to see if your shimming is any good. listen and watch.

good plan! I will try this because the gears are all in pretty decent condition. So the chances are its the shimming thing.... joy lol

right cheers all lets hope it works

[hayesie]

What rifle is it? I had a similar problem with my rifle turns out was the anti reversal latch locking in place

[bobfish]

Re: V2 gearbox jamming at same point each time.

What rifle is it? I had a similar problem with my rifle turns out was the anti reversal latch locking in place

It's a m4?
Its a v2 gearbox, the anti reversal latch is a little bugger to keep in place when putting it back together! how did you work out it was the anti reversal latch?

[BALBOSA]

Re: V2 gearbox jamming at same point each time.

the ar latch has to be pushed back towards the case so it can spring back onto the gear when you put it back if you can go one way and not the other your ar latch is in correctly

[bobfish]

Re: V2 gearbox jamming at same point each time.

the ar latch has to be pushed back towards the case so it can spring back onto the gear when you put it back if you can go one way and not the other your ar latch is in correctly

lol no no I knew that but I don't know how a latch could stop the movement at the exact same point each time.