I remember that one ... exquisite work.man .. back in the day we had so much M-rod innovation going on.
Many years ago I got into rebuilding and fixing up VW bugs and busses. It was said and it seems to have some truth to it, rebuild four bugs and you will have enough left over parts to build a fifth bug . Well, applied to air rifles, soon, I will have enough parts to build another M-Rod. If I take this one back apart again, I might be there .
If with the SPRING currently used, and if poppet stem has HST bearing against it ( Preloaded ) Going to a TSS or SSG ( Free flight hammer ) WILL REQUIRE A STIFFER SPRING and will increase cocking effort.Just FYI ...
The MDS hammer is self lubricating, so no need to add other lube. I have had some swell under high humid conditions, causing sticking conditions and need to be reduced in OD. You can also cause some to distort by tightening the hammer pin too much. I'm surprised that the JSAR hammer has allot shallower spring pocket. The next time you have it out, could you post a depth measurement? Before purchasing more parts, better to get "aired up" such that you can test the typical middle of the curve which is generally 2500-2600psi on 25 non-regged Mrod.
I took a look at the current JSAR Super Hammer pics. It looks more like the Buffer Hammer, they use to make. I can see that the pocket is shallower. Keep in mind that with this shallow pocket, the 2.5" springs used with a TSS might not be able to be gapped, without the adjuster sticking well out the back. The TSS adjuster is larger diameter than the oem, at around 5/8". Probably your stock will need some minor work to allow for that. JFYI.
Quote from: FuzzyGrub on August 15, 2022, 03:05:44 PMI took a look at the current JSAR Super Hammer pics. It looks more like the Buffer Hammer, they use to make. I can see that the pocket is shallower. Keep in mind that with this shallow pocket, the 2.5" springs used with a TSS might not be able to be gapped, without the adjuster sticking well out the back. The TSS adjuster is larger diameter than the oem, at around 5/8". Probably your stock will need some minor work to allow for that. JFYI.Keep in mind that the hammer slides further forward, hitting the valve face before the poppit bottoms out. Thus "the buffer hammer".Hunter