First, remove the scope (if you have one) in my Diana 34 I have a Tasco
Golden Antler 3-9X32 mounted on a BSA adjustable base.
To disassemble the rifle, first remove the front screw of the trigger guard...
Remove the two screws at the for-end of the stock....
Once the receiver/barrel are out of the stock, we need to remove the 2 pins holding the safety and trigger mechanism, at this point, there is tension in the spring, but is not much. as you tap on the pins with a punch aim the receiver down and use rags or pieces of carpet to avoid damage, as it comes out.
The original spring had less than 500 shots and I was very surprised to find it bent, The JM spring is somewhat shorter, but this is the way the springs are designed.
The 2 retaining pins after the assembly came out....
This is the heavy tar that comes with the James Maccari tune kit, this lubricant is a sticky grease for the exclusive use of the spring, it should be applied towards the end of your project, when everything is being reassembled.
Here the spring has the tar on it and just before we put the trigger/safety assembly back onto the receiver, normally the tar should cover just the outside of the spring, here I applied a little too much.
We don’t have a spring press (recommended) so my son Alain, pushed down with a piece of a 2x4 and when the holes lined up, I inserted the punch in one of them to retain the position under the tension of the spring, then I replaced one pin, then the other, these are very easy to insert by tapping them lightly with a small hammer.
Right after I reassembled everything back, I went to our backyard to test the rifle, the tune totally eliminated the twang and the rifle no longer jumped sideways, even the sound changed to a solid THUD !
I was very impressed by the vast improvement over the original spring that came with the rifle, this upgrade is highly recommended for all owners of this rifle model, it sure made a world of difference for me.
After I re-zeroed the scope, I made this center group of eight shots at 15 yards, since the rifle is steadier it is now even more accurate. The rifle clocked at : 710fps with Crossman premiers 5.5, 14.30 grains. plus the gun shoots and cocks even sweeter and groups like a champ.
Tools needed:
Small punch, small hammer, phillips screw-driver a piece of wood (2x4)
Level of Difficulty: (1-10) I rate this project as a: 4
This upgrade requires a James Maccari tune kit and is highly recommended for all users.