The instructions clearly state to make sure the dot is installed up. What isn't so clear is which of the two compression rings goes on the top? One has the bevel up and the other has the bevel down? Thanks for any help or insight. Gary
As a rule, rings with an inside bevel face up and the rings with a out side bevel face down, the inside one would be a top ring and the out side bevel is the second ring.
Kerry, thanks so much for replying. Sorry I wasn't too clear, both bevels are on the inside. One bevel faces the dot and the other bevel faces away from the dot. The one with the bevel facing the dot is more pronounced, the bevel,facing away from the dot, is much smaller. I attempted to take pictures without much success. Gary
This is my attempt at drawing the rings.
OK, your first drawing ring, dot and bevel is top ring, second ring dot to the top, with that type of second ring with a small bottom bevel should also be slightly shamford down to be thicker on the out bottom side,you may not see it by eye.
If you look at the top or bottom tab on the box, it should have the rings and their position listed by the section of the box they are in.
Look on the small end tabs of the box. Hastings likes to put the info there.
The rings amy also be provided in pouches 1-2-3 per piston.
The purpose of the I.D. chamfer is to induce "twist" in the ring when it is compressed as installed in the bore.
Roar
Thanks so much for the help! I now see the tabs mentioned above, but of course, I have removed them from the box. Well now I know what to do. Model T drivers are the best!
I have run into this 2 times, remembered to look at the tab after pulling the first set of rings out of the box the 2ed time. I wish they would print the slot number on the wrapper or inside of the tab.
Gary,
In your drawing the "A" should be your top ring
The chamfer, or removed metal, at the top ID corner causes the ring to twist when compressed because there is less metal at the top to resist the compression. That twists the ring so that the lower OD edge bears harder against the cylinder wall than the top. This will facilitate the ring "surfboarding" on the oil on the cylinder wall when moving up, and it will help "scrape" the oil off the cylinder wall when descending.
Roar