Reply To: Canadian Diana 75 Kit is here !!
Joe I know you probably have done this, but check the cogs on the idler gears and piston racks for unusual wear, cracks or chips. I had to replace both idlers on my D75.
New ones from JG Airguns on left
And… make sure the two inner springs have the closed ends facing each other so they don’t wind around each other. Even though the inner tube has a tang to prevent it, I noticed it could still happen. Or you can bend a short dogleg at the very end of each spring.