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doc_678 · December 17th, 2005, 23:25

Gun: ICS M4A1
Upgrades: metal piston, ics turbo 2000 motor, crane stock

Problem:
The problem began after I tried a 130% spring in the gun. I put the stock spring back into the gun and the problem continued (the stock spring is still in the gun). Basically the gun is not able to pull the piston back. The piston starts back and then stops and the whole gun seizes up. It chewed up the original plastic piston that was in the gun so I replaced that with a metal one. Then it chewed up the pinion gear on the motor which I replaced. I have tried an EG 700 and EG 1000 motor in the gun with no results. It’s currently running of a 9.6V battery so I even tried downgrading to 8.4V again no help. The gears turn just fine when the two halves of the mech box are separated. The shim job is definitely fine as is the greasing of the gears which has been done twice since this began. I also tried replacing all of the gears with some that I had around and still nothing. Also the piston can be pulled back manually with no apparent obstruction. For the life of me I can’t figure out anything else to try. Everything looks fine inside the gun so it’s hard to spot anything that might cause this. Any help would be appreciated. And please don’t tell me to go see the local gun doctor because I am it :P only relevent technical help please.

December 17th, 2005, 23:25	#1
doc_678 Trader rating Join Date: Dec 2005 Location: Guisborough NS	ICS M4 seizing up Gun: ICS M4A1 Upgrades: metal piston, ics turbo 2000 motor, crane stock Problem: The problem began after I tried a 130% spring in the gun. I put the stock spring back into the gun and the problem continued (the stock spring is still in the gun). Basically the gun is not able to pull the piston back. The piston starts back and then stops and the whole gun seizes up. It chewed up the original plastic piston that was in the gun so I replaced that with a metal one. Then it chewed up the pinion gear on the motor which I replaced. I have tried an EG 700 and EG 1000 motor in the gun with no results. It’s currently running of a 9.6V battery so I even tried downgrading to 8.4V again no help. The gears turn just fine when the two halves of the mech box are separated. The shim job is definitely fine as is the greasing of the gears which has been done twice since this began. I also tried replacing all of the gears with some that I had around and still nothing. Also the piston can be pulled back manually with no apparent obstruction. For the life of me I can’t figure out anything else to try. Everything looks fine inside the gun so it’s hard to spot anything that might cause this. Any help would be appreciated. And please don’t tell me to go see the local gun doctor because I am it :P only relevent technical help please.