Seeing as i was passing on the Norica to my mate i thought i would give it a bit of a tune up, besides i needed to drop the trigger pull a bit as well so kill two birds with one stone. Also it would give me a chance to see how the spring compressor would work out, i reckon there must be some preload as it is quite heavy to cock.
|Preload is from the start of the wider trigger slot|
|spring and washer pushed forward and trigger unit slipped out forwards|
|Handy device for removing trigger block and then letting spring and all free|
|Held down by loads of parcel tape|
|Handy device being slipped between trigger block and cylinder walls|
I removed the guts or the rifle which was pretty dry except for a spot of oil behind the nylon piston seal, it all seemed in pretty good nick apart from where the piston had rub a little on top of the cylinder. however the end of the main spring had not been ground flat, and the sharp ends had left a ring of tiny marks on the top hat and the metal washer on the inside of the spring guide. The mainspring itself was in near new condition but where the sharp edges had nicked the tophat and washer there were minute flecks of metal scattered about, the piston was heavy with an inner sleeve which was a tube with cocking and sear latching cut into the outer layer.
|Spring as it came out of rifle|
|Both ends ground down flat and polished|
|Heavy polished top hat and piston seal|
|this is one heavy piston i can tell you|
|Just some handy shit to have around for tuning|
Before reversing the whole process of using the special tool to slip the trigger unit back into the slot in the cylinder i used the Dremmel to grind the sharp edges off the sear and piston, but only a little as i did not want to mess it up big time. Carried on putting the Norica back together and put the scope back on, which with the stop on it should not interfere with its previous POI.
|spring pushed back in so trigger block can be replaced|
As i said i could lighten the trigger some more, but i shall leave that up to my mates discretion . Me personally, i would take it down a lot more but then i am used to being spoilt on Record triggers
Best Wishes, Wing Commander Sir Nigel Tetlington-Smythe DOA OBE MBE FOAD