(Off topic) Wow, I'm really here on the graveyard shift. It's just me and Googlebot.
(On topic) You said the o-ring seemed small? What likely happened was that the o-ring dried out and it can't force air into the bladder now. Thus you pump and it goes freely, but with no resistance, right?
The same thing happened to my RF20 after I took it out of storage. I had to pump like a madman in order to prime it a little bit. Because I pumped so fast, the friction heat expanded the o-ring and I was able to pump it again. I concluded my diagnostics by putting a bit of water into the pump shaft. Immediately, my pump worked, so I know it was a dry o-ring.
Solution? Go to a hardware store (ACE, Home Depot, Menards, Lowe's, etc.) and pick up a new o-ring and some silicone spray. Replace your o-ring and lubricate with the silicone. This should stay effective for quite some time.
No, I haven't actually done this with my RF20. Why? I never was a huge fan of the gun, and I didn't think it was worth my effort. Maybe I will come around to doing so if I ever get a big war going...This method will work though; it's the foremost option I would try doing. The RF20 and the WF are essential the same gun. If, for any reason, it doesn't, some tinkering around with the pump will help you. That's how I performed my diagnostics. Let me know how this turns out via post or PM. I'm interested to see what happens. It might just inspire me to breathe new life into my gun...Hope that was a help, good luck!
~Rings
Edited by LordoftheRing434, 07 March 2006 - 03:38 AM.
And when he gets to Heaven, to St. Peter he will tell, "One more soldier reporting sir, I've served my time in hell."
"I bluff it. I don't throw my weight around and say I know what I'm doing." ~ Mick Jagger