I love how it has a bearing to deal with the spring rotation. Looks pretty straight forward to remove the spring.Does anyone know if there's a warranty on refurbished hatsans?
Quote from: Madd Hatter on February 15, 2023, 07:16:04 PMI love how it has a bearing to deal with the spring rotation. Looks pretty straight forward to remove the spring.Does anyone know if there's a warranty on refurbished hatsans?Never tried to use warranty on a refurbished Hatsan. Did try for warranty repair a couple times on factory refurbished/sealed Umarex rifles and was told NO :-(Good idea for a dedicated spring compressor. That one fits between Quattro trigger flanges and uses Quattro latch pivot pin. Should work on any Quattro equipped springer.Hatsan Mod125/135 springs are HUGE, but not difficult to remove. Whatever spring compressor is used it NEEDS at least a 3" travel for that big spring.The very long (GOOD!) spring guide shown in the video is NOT STANDARD on Hatsans sold here in the US. Here the factory guide is silly-short and typically a loose fit.On every Mod125/135 coil springer I own I discard the factory spring guide and make a LONG SNUG FITTING guide similar to what is shown in the video. I use steel but a hardy polymer would be fine.I prefer to use a simple spring bearing sandwich consisting of a hard slippery polymer washer and a hard steel washer contacting the polished spring end. A little moly paste keeps friction very low. This is more than adequate to allow free spring rotation during the cocking/firing sequence. IMO the ball bearing thrust washer is completely unnecessary. After first seeing that idea a few years back I had bad dreams that one of those thrust bearing cages failed and let the steel BBs free to destroy the innards of my magnum springer. I've seen that happen in several non-airgun applications.Some suggestions based on what I saw in the video...DON'T use tiny flat blade or undersized Phillips screwdrivers. This is the main reason Hatsan screw heads get constantly MANGLED! I use drivers ground to PROPERLY FIT all my Hatsan screw heads and have NEVER damaged any myself.DO use PROPERLY fitted drivers for ALL the fasteners!DON'T HAMMER the cross pins with steel tools or grab those pins with steel pliers! You risk mushrooming the pins or causing other damage. DO use a plastic headed mallet and a plastic/brass punch to GENTLY remove and reinstall those pins WHEN NECESSARY. Most of the time, with the right compression, I can just push the pins out/in with no tools at all.DON'T use large linesmen pliers or screwdrivers on the small springs. You will lose the spring or skewer your fingers.DO use NEEDLE NOSE pliers on the small springs. They make removal/re-installation much easier.DON'T completely remove the main Quattro latch pivot pin. DO first make a SHORT DUMMY PIN the same diameter and with a length that just fits FLUSH with the Quattro trigger group frame. Use the dummy pin to push the longer pin out while the short pin stays INSIDE holding the main latch in position. This makes the trigger SO MUCH EASIER to reinstall later.There are more tips that Mike E covers in his videos. Those videos can be overly long IMO but I did learn a lot from them. Also learned a lot by working on a few dozen Hatsans myself.