Cracked power tube?

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   Okay I think I may have posted this before but I always put it off and then forget what the problem was anyway. 

Everytime I fire my 98C it makes a weird sound like it's using way to much air, very loud and chops alot, like 1 out 4 balls. So I took it apart and looked at the power tube but didn't see any cracks but the screws on the right side to hold the power tube in are pretty loose.

So is a cracked power tube the problem?

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Watari Members Profile Send Private Message Find Members Posts Add to Buddy List Member Mmmm... Shiny Star... Mmmm.... Joined: 21 July 2003 Location: Canada Status: Offline Points: 364	Post Options Post Reply Quote Watari Report Post Thanks(0) Quote Reply Topic: Cracked power tube? Posted: 17 March 2005 at 4:49am
	Okay I think I may have posted this before but I always put it off and then forget what the problem was anyway. Everytime I fire my 98C it makes a weird sound like it's using way to much air, very loud and chops alot, like 1 out 4 balls. So I took it apart and looked at the power tube but didn't see any cracks but the screws on the right side to hold the power tube in are pretty loose. So is a cracked power tube the problem?


LordJovian Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 01 June 2004 Location: United States Status: Offline Points: 1882	Post Options Post Reply Quote LordJovian Report Post Thanks(0) Quote Reply Posted: 17 March 2005 at 1:23pm
	Possible that your valve bolts are stripped- you may have torqued them too much putting them on. When these are "stripped," it's actually the valve that is stripped. May also be that your velocity is set too high (above 300 fps). Check the bolts by taking them out, and try putting some teflon tape around them (just wrap around once or twice). Check your velocity next time you're at a chronograph (don't play until you do). Make sure to also keep the CVX oiled well.
	A-5 E-grip Chipley Custom Carbon Graphite 16" Evil Adapter(Spyder) 32 Deg New '03 XChamber Remote Line Gun Sling Sniper f/x Stock LPK 68/4500 HPA R-5 CP Reg JCS Duel Trigger

triggerhappy1 Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum Member Joined: 07 May 2004 Location: United States Status: Offline Points: 3376	Post Options Post Reply Quote triggerhappy1 Report Post Thanks(0) Quote Reply Posted: 17 March 2005 at 1:24pm
	If your powertube actaly is cracked you will need to replace it. But if just the screws are loose, you will get this problem. So apply Loctite on the valve screw threads, and just snug them in. Be very carfull not to overtighten, crossthread and strip the holes. When your bolts are loose on the valve, the rear bolt will pull the whole valve back during blowback a tiny bit further since its loose. Then since its in a differant position, the bolt will hit the valve plunger harder or lighter; usually harder.