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PoFF · May 23rd, 2009, 09:10

I've recieved my new parts from Airsoftparts.ca (excellent service BTW), and one of these parts was a Military Action aluminium piston with full titanium teeths. I rebuilt my gearbox (PGC V3 gearbox for TOP M249) and what's happening is that the motor & gears are fully cranking the piston, and the gears continue to spin, but the piston stays back, fully cranked (with the gears making an awful grinding sound.

I know that the gear timing / shimming / overall installation is perfect, as the whole setup works perfectly with another piston that I had on hand.

Any reason why such a thing would happen, do I need to go some filing and/or grinding on that piston for it to work properly?

MODS : Please feel free to move this topic into the Doctor's Corner if needed, as I wasn't sure of the right location.

May 23rd, 2009, 09:10	#1
PoFF Trader rating Join Date: Dec 2001 Location: Laval, QC	Military Action Titanium Piston Jamming I've recieved my new parts from Airsoftparts.ca (excellent service BTW), and one of these parts was a Military Action aluminium piston with full titanium teeths. I rebuilt my gearbox (PGC V3 gearbox for TOP M249) and what's happening is that the motor & gears are fully cranking the piston, and the gears continue to spin, but the piston stays back, fully cranked (with the gears making an awful grinding sound. I know that the gear timing / shimming / overall installation is perfect, as the whole setup works perfectly with another piston that I had on hand. Any reason why such a thing would happen, do I need to go some filing and/or grinding on that piston for it to work properly? MODS : Please feel free to move this topic into the Doctor's Corner if needed, as I wasn't sure of the right location. __________________ Founding member of the S.A.T.T - That's right, were BACK! The only purpose for a pistol is to fight your way back to the rifle you should have never laid down Visitez Arme ?* Feu.com - Le site des amateurs d'armes ?* feu francophones Last edited by PoFF; May 23rd, 2009 at 11:51..