DAMPER AS 1903125 - Caterpillar

Steel Piston
Illustration 1 g01375031
(6) Connecting rod (A) Height of the tall piston ... 105.00 0.10 mm (4.134 0.004 inch)Note: Before assembly, lubricate the entire piston body assembly (1) to 360 degrees on zone (A) with the clean engine oil.Top Piston Ring (2)
Note: Install the top piston ring with the side marked "UP-1" toward the top of the piston. The green colored stripe faces to the right of the ring end gap.Thickness of the new top piston ring ... 3.95 mm (0.156 inch)Clearance between the ends of the piston ring in a cylinder liner bore of 130 mm (5.1 inch) ... 0.51 0.05 mm (0.020 0.002 inch)Increase in the clearance between the ends of the piston ring for each 0.03 mm (0.001 inch) increase in the cylinder liner bore ... 0.09 mm (0.004 inch)Intermediate Piston Ring (3)
Note: Install the intermediate piston ring with the side marked "UP-2" toward the top of the piston. The violet and the orange colored stripe faces to the right of the piston ring end gap.Thickness of the new intermediate piston ring ... 2.98 0.01 mm (0.117 0.001 inch)Clearance between the ends of the piston ring in a cylinder liner bore of 130 mm (5.1 inch) ... 1.00 0.10 mm (0.39 0.004 inch)Increase in the clearance between the ends of the piston ring for each 0.03 mm (0.001 inch) increase in the cylinder liner bore ... 0.09 mm (0.004 inch)Oil Control Piston Ring (4)
Note: The ends of the oil control piston ring should be a distance of 180 degrees from the ring end gap when the oil control piston ring is assembled. The green colored stripe can be to the right of the ring end gap or to the left of the ring end gap.Thickness of the new oil control piston ring ... 3.98 0.01 mm (0.157 0.0004 inch)Clearance between the ends of the piston ring in cylinder liner bore of 130 mm (5.1 inch) ... 0.45 0.15 mm (0.018 0.006 inch)Increase in the clearance between the ends of the piston ring for each 0.03 mm (0.001 inch) increase in the cylinder liner bore ... 0.09 mm (0.004 inch)Note: After the piston rings have been installed, rotate the piston rings so that the end gaps are 120 degrees from each other.Piston Pin (5)
Note: Before assembly, thoroughly lubricate the piston pin with clean engine oil.Outside diameter ... 53.155 0.005 mm (2.0927 0.0002 inch)Inside diameter ... 23.00 0.25 mm (0.906 0.010 inch)Length ... 92.00 0.15 mm (3.622 0.006 inch)Bore diameter for the piston pin ... 53.250 0.010 mm (2.0965 0.0004 inch)