Hey everyone it's been quite awhile since I've been on the site. I am having troubles with my crosman 140 3rd variant. I can't even begin to explain how many tins of pellets Ive put through this thing. I've been shooting this on a pretty consistent basis for well over 20 years, I've always kept it well oiled and stored it in my safe with a couple pumps in it safety on. All of the sudden it won't let me store multiple pumps in it and it won't self cock, I think it's not letting air from the pump chamber into the holding chamber. I'm not sure how these are constructed specifically because I've never had an issue with it but I have other rifles and understand the concept. Any ideas? Thanks.
Where do I introduce the alcohol? Leave the piston up and pour in it shake it around maybe let it sit for awhile then dump it back out?
Viton or some sort of special seals? What's the best?