Quote:
Originally Posted by Skladfin
What are obvious signs of air leak on the parts?
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The best way to check for leakage, IMHO, is to strip the gun down to the mechbox and remove the compression system. Take out the hopup unit, cylinder, piston, cylinder head, and nozzle.
Hold the cylinder (with cylinder head in place) in one hand and put your index finger (on the same hand you're holding the cylinder with) over the nozzle end of the cylinder head. Then try and insert the piston. If you airseal is perfect, the piston will slide into the cylinder a cm or two and then stop - air pressure will stop it from going in any more. If it slides all the way in fairly easily, something is leaking air, so check the piston head o-ring and the cylinder head o-rings to make sure they aren't nicked, and try soaking them overnight in silicone oil (this will cause them to swell slightly, making a better seal). Yu may need to replace the o-ring completely. Also check to see that the piston head itself isn't nicked/chipped/out of round.
Also take apart your hopup and check to see that the rubber is correctly installed and not torn.