mcarterbrown.com
 

Reply
 
Thread Tools Search this Thread
Old 12-21-2010, 05:32 PM   #1 (permalink)
Active Member
 
Runningriot's Avatar
 
Join Date: Jun 2007
Location: PA

68 special differences



Why do some 68 specials have a valve spacer and others don't?
__________________
Runningriot is offline   Reply With Quote
Old 12-21-2010, 10:03 PM   #2 (permalink)
THE NEW PA
 
B.R.'s Avatar
 
Join Date: Nov 2010
Location: ne Pa

This may not be totally correct.....
But they changed valves at some point along the line.
some of them have a pin that goes through the body right behind the 90 d micro fitting
Others dont. I think one valve is longer than the other. I'm on the throne atm so not near a gun.
Also as you see in your pic. tje sight placement is different.
Hp lovecraft is real smart o on these
__________________
FEEDBACK http://www.mcarterbrown.com/forums/f...-feedback.html
this big tranformer came through a town like 30 miles from my hometown!!
B.R. is offline   Reply With Quote
Old 12-22-2010, 11:53 AM   #3 (permalink)
Active Member
 
Runningriot's Avatar
 
Join Date: Jun 2007
Location: PA

Quote:
Originally Posted by B.R. View Post
This may not be totally correct.....
But they changed valves at some point along the line.
some of them have a pin that goes through the body right behind the 90 d micro fitting
Others dont. I think one valve is longer than the other. I'm on the throne atm so not near a gun.
Also as you see in your pic. tje sight placement is different.
Hp lovecraft is real smart o on these
I noticed that about the pin, the one with the spacer doesn't have it.

Its not that the sight placement is different, there is another machining process that takes more material out to allow for the spacer. I believe that the bodies are the same.

If the valves are different that means that this is where they switched over from needing liquid c02 to non siphon tanks?

Thanks for the info B.R.
__________________
Runningriot is offline   Reply With Quote
Old 12-22-2010, 12:12 PM   #4 (permalink)
won't look at the camera
 
Chappy's Avatar
 
Join Date: Apr 2006
Location: Secretly policing you...

Fan of EMR
[QUOTE=Runningriot;1604761]

If the valves are different that means that this is where they switched over from needing liquid c02 to non siphon tanks?
QUOTE]

I beleive all specials were designed to run on siphons.
__________________

"But if somebody left you out on a ledge, If somebody pushed you over the edge, If somebody loved you and left you for dead,
You got to hold on to your time till you break through these times of trouble"
Temple of the Dog
Quote:
Originally Posted by ironnerd88 View Post
Tournament play is about the worst spectator sport out there. I would rather watch Synchronized Dungeons & Dragons.


My Feedback: http://www.mcarterbrown.com/forums/s...3932#post13932
Chappy is online now   Reply With Quote
Old 12-22-2010, 01:06 PM   #5 (permalink)
THE NEW PA
 
B.R.'s Avatar
 
Join Date: Nov 2010
Location: ne Pa

ive been thinking about it and looking at a couple valves ive got sitting here.
the pin in some controls the amaount of movement of the valve and the others its the c-clip on the back heres a pic of both.Name:  rsz_pc220002.jpg
Views: 300
Size:  200.6 KB

and some of the power tubes have a backend w/ a steel pin like the prolites had while most were just aluminum w/ 3 holes like the procarbs.
i cant remember the trouble i had or the solution to the problem ...but one i couldnt get decent velocities out of because i think the front "pin?" the part of the cup seal that hits the power tube was always stuck open or something.
IDK some of the conclusions that i come to are probably off though
__________________
FEEDBACK http://www.mcarterbrown.com/forums/f...-feedback.html
this big tranformer came through a town like 30 miles from my hometown!!
B.R. is offline   Reply With Quote
Old 08-28-2013, 10:28 PM   #6 (permalink)
Old School Woods Baller
 
StrayBlackCat's Avatar
 
Join Date: Aug 2013
Location: Florida

Quote:
Originally Posted by B.R. View Post
ive been thinking about it and looking at a couple valves ive got sitting here.
the pin in some controls the amaount of movement of the valve and the others its the c-clip on the back heres a pic of both.Attachment 19760

and some of the power tubes have a backend w/ a steel pin like the prolites had while most were just aluminum w/ 3 holes like the procarbs.
i cant remember the trouble i had or the solution to the problem ...but one i couldnt get decent velocities out of because i think the front "pin?" the part of the cup seal that hits the power tube was always stuck open or something.
IDK some of the conclusions that i come to are probably off though
Your picture says it all. On the early version, the pin below the valve restrained the valve but allowed required movement. The hardened steel roll pin is prone to surface rust. Due to receiver machining variances and pin location the pin could rub the valve. Some markers worse than others and not obvious on shop tests(new pins). The more brass removed during use, the more brass surface area contacted the pin increasing friction and interfering with valve float. Worse, If the roll pin had the groove up then it acted like a planer biting into the brass. A possibility each time the valve was serviced. Common enough to warrant a design change. The upgrade milled the valve and rear receiver, deleted the pin and added the C spacer/retainer. This did the same job without the issues. This was done on all later production, SMG upgrades, and shop serviced 68 Specials.
__________________
It's a Tippmann 68 Special, Why would I need anything else...
StrayBlackCat is offline   Reply With Quote
Reply

  mcarterbrown.com » Paintball » The Armory » Tippmann

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -4. The time now is 10:03 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO
© MCB Network LLC