To LLeon and other Hatsan lightning owners- keep an eye on your oil color. Mine was amsoil, and was crystal clear when new. When drained after the first year it had only a slight tint of brown, and my coolant was still normal looking of what used coolant looks like.
About a month or so ago, long before the system failure, I had noticed my new coolant mix darker than normal, and my new oil was totally brown. I had about 5.5 hours on this new oil and coolant, whereas the liquids from the first change had around 9 hours of use. That’s the only thing different that I’ve noticed, when trying to decipher why it failed. Like I mentioned in my other thread, there were no signs that I saw that led to this, but now I’m thinking excessive blow by making it back to the oil and maybe the aluminum head pieces became porous and allowed tainting of my coolant.
if the new parts completely get this back up and running like it was brand new again, that just tells me knowing what I now know, the HPA cylinder should be disassembled and all new parts installed each and every year, for sure as preventative maintenance.
im going to post up the o ring sizes that Tuxing gave me, so if you want to order up o rings from the numerous o ring vendors you can use this to stock up on maintenance parts. Just keep in mind on the metric sizes called out, the first number given is the OUTSIDE DIAMETER and the second number is the CROSS SECTION THICKNESS of the o ring. I had to verify with Tuxing if the first number was ID or OD because where I like to order o rings, that vendor uses the ID as the first number. Example- oringsandmore.com uses the first number to list ID, second number is thickness. For the “A” set of O rings I would order 52mm x 2.5mm.
i also asked Tuxing what material type were the green colored o rings, and they said Viton.
Lastly, the O rings labeled H are for the top four cap bolts that seal the water jacket cap. After you cinch down those cap bolts, those o rings are basically cut up and trashed, so out of all the o rings shown in this pic, the H ones you want a lot more than just four, in case you have to re open that cap.