I spent the day taking apart my JJ rest and giving it a good cleaning. It had 12 year old grease (silver like anti-sieze?) on the foot adjustments which was quite hard, cleaning that off and applying a thin layer of Red & Tacky made the adjustments so much easier and smoother.
I also put some SAE 30W oil in the 4 ports, for the guide rods - they were dry. There was some leaking out the bottom and the top when I put the plugs back in, which is to be expected. Adding the oil made the windage adjustment much easier also, almost too easy now?
The one strange thing was the oil port plugs themselves, they each have some type of plastic bumper on the bottom of the thread, where it would/could contact the guide rods. See pic below.
The top of the plugs were screwed in flush with the top of the rest leaving approximately 1/4" between the green bumpers and the rods themselves, this seems to be consistent with pictures I've seen on here of other JJ rests.
I can think of two purposes for these bumpers:
A) To tighten down against the rod and apply some tension to the adjustment.
B) In case you accidentally tighten the plugs down too far, to prevent the screw head from contacting and marring the surface of the rod.
What say you - A or B?
I also put some SAE 30W oil in the 4 ports, for the guide rods - they were dry. There was some leaking out the bottom and the top when I put the plugs back in, which is to be expected. Adding the oil made the windage adjustment much easier also, almost too easy now?
The one strange thing was the oil port plugs themselves, they each have some type of plastic bumper on the bottom of the thread, where it would/could contact the guide rods. See pic below.
The top of the plugs were screwed in flush with the top of the rest leaving approximately 1/4" between the green bumpers and the rods themselves, this seems to be consistent with pictures I've seen on here of other JJ rests.
I can think of two purposes for these bumpers:
A) To tighten down against the rod and apply some tension to the adjustment.
B) In case you accidentally tighten the plugs down too far, to prevent the screw head from contacting and marring the surface of the rod.
What say you - A or B?
