Hello,
Having searched several places and found no information on this topic. Maybe I've overlooked it, maybe I'm not looking in the correct places.
I am doing a major rebuild of a hydraulic pump. The new piston rings I have purchased, when placed in the new cylinders, have varying ring gaps, 2 at 8 thou, 1 at 12 thou, and 1 at 15 thou. It seems the tolerances of these rings vary, as does the thickness of the rings also vary, 2 at 43 thou, and 2 at 47 thou.
I have found from engine builder's imperical data a measure of 4 thou per inch mininum, which would mean something between 3 and 4 thou minimum, but I have no idea of the maxamium acceptable gap.
As a matter of interest I pulled one of the old rings out and measured the gap, and it was 6 thou, and it was 39 thou thick
Could anyone with experience in these pumps let me know what is acceptable and what should be replaced as far as ring gap goes on one of these pumps.
Thanks E
Having searched several places and found no information on this topic. Maybe I've overlooked it, maybe I'm not looking in the correct places.
I am doing a major rebuild of a hydraulic pump. The new piston rings I have purchased, when placed in the new cylinders, have varying ring gaps, 2 at 8 thou, 1 at 12 thou, and 1 at 15 thou. It seems the tolerances of these rings vary, as does the thickness of the rings also vary, 2 at 43 thou, and 2 at 47 thou.
I have found from engine builder's imperical data a measure of 4 thou per inch mininum, which would mean something between 3 and 4 thou minimum, but I have no idea of the maxamium acceptable gap.
As a matter of interest I pulled one of the old rings out and measured the gap, and it was 6 thou, and it was 39 thou thick
Could anyone with experience in these pumps let me know what is acceptable and what should be replaced as far as ring gap goes on one of these pumps.
Thanks E
