It’s all in the five P’s with working on these pcp”s. Proper Planning Prevents Poor Performance. Just today I swapped in for a new dual hole transfer port in one of my rigs, along with a pellet probe. Had to drain the air out of the gun, for one of the other tasks I did, and common sense tells me on a gun that’s been sitting under high pressure air for a long while, if you wait too long or leave the gun overnight not reassembled back together, you’re gonna get a surprise leak come morning when you reassemble and fill with air, cause the o rings inside were allowed to shrink back up which will not necessarily mean they’ll take back the same shape when refilled with air. Plus, if it’s been over a year or two those o rings inside have had their time. The lesson here is always be prepared to replace an o ring anytime you plan on draining the air out for some type of service, on any pcp.
To CHECKURSIX, go on oringsandmore.com. Or theoringstore.com and familiarize yourself with the ordering of o rings. Download the FX parts diagram from the FX website for your gun and learn to pull all the o ring sizes out for your M3 and learn how to order them. In the end you’ll spend less than buying in kit form, and have enough to reseal your M3 for at least 10 complete reseals.
These o rings that FX uses, between the X rings, the polyurethane, and the different durometer thicknesses, these aren’t the typical o rings that you’ll find at the local building supply house or plumbing store.