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Old 05-28-2014, 06:16 PM #1
JabzXtreme's Avatar
Join Date: Dec 2013
Location: Long Island, NY
On/Off ASA Screw Issue Solved

I have an older CP On/Off ASA. Doesn't have a purge.

Been having trouble getting my Tank and ASA On/Off Screw to catch properly, it would stop feeding my marker, or the pin would be too far into the Tank Pin, or I couldn't get it to go OFF by unscrewing the knob... So...

Step 1: Take it apart! - If you unscew your ASA Knob all the way it'll fall out, and leave you with the threaded O-Ring Pin part inside - You can pop this out and grease the O-Ring.

I noticed that there's 2 bits of threads - One for the ASA Knob onto the ASA itself,
And one for the Knob to thread onto the Pin part. Aha! That must be the problem! My Knob must be unscrewing from Pin instead of unscrewing the Pin with it!

Step 2: Grease ASA Pin O Ring. (Possibly a little on the Knob outside threads to make it easier to screw). DO NOT GREASE THE INNER KNOB THREADS OR PIN CONNECTOR THREADS!)

Step 3: Insert Pin into ASA and push it all the way back with Needlenose Pliers. Slowly screw the ASA Knob back onto it while keeping the pliers pressure on the Pin and making sure you're not screwing the Pin in with the Knob yet - (I had to grip the black hex looking part passed the pin to keep it from turning with the knob while I screwed on the knob.) The goal here is to screw the Knob onto the Pin all the way until it's fully tight, without screwing the knob into the ASA itself all the way.

Step 4: Make sure it's good and tight! Test by unscrewing the knob and watching the Pin to see if it's unscrewing properly! If not repeat step 3!.

You'll notice when the knob is tightened onto the Pin threads properly, the knob screws in all the way to the ASA, but not all the way out anymore unless you "Force it to keep unscrewing".

Yay now we can use our ASA as it is supposed to work and stop wondering why unscrewing it doesn't turn it off!

I know it sounds simple but I had to investigate the problem to figure this out so I wanted to share. I'm sure more people have unscrewed their Knob a little too much by accident and then the Pin screw lost tightness with the knob.
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