Madbull XMPB4 grenade

[god84]

hey all, im having trouble getting my grenade to hold gas, i've used it 3 times and now its not holding gas.

i have reset the berrings but im getting nowt!! can you help peeps?

[loki7491]

Re: Madbull XMPB4 grenade

As you put the gas in, does it his back out at the same sort of speed or will it take gas and slowly leak it out, so if not used in an hour say, it wont fire?

[god84]

Re: Madbull XMPB4 grenade

i put gas in and it passes through like air through a hole mate.

[loki7491]

Re: Madbull XMPB4 grenade

turnit upside down an use a pen (like a kids felt tip pen, not a biro) to push the valve in.

You will feel the spring pressure followed by the valve hitting home. Apply a little more pressure and it should move a little more.

It sounds like the return spring isn't man enough to force the o ring seal into place on the internal valve. It is common on all the madbull shells i have had. By pushing it with a pen you are taking up all the slack in the spring and then pushing it into position.

Try to push true and square to avoid damaging the o ring.

Let me know if that solves it for you, or we are back to the drawing board.

[god84]

Re: Madbull XMPB4 grenade

ah thanks man! i will check it out as soon i get home!!