VALVE GP-BOOM LOWERING CONTROL 3905098 - Caterpillar

Illustration 1 g06226990
Table 1
Item Qty Part Specification Description
1 1 223-9159 Top Piston Ring Install the top piston ring with the side marked "Up-1" toward the top of the piston. Orient the purple stripe face to the right of the end gaps of the piston ring.
Clearance between the ends of the top piston ring in a cylinder liner bore of 145.0 mm (5.71 inch) is 0.40 0.10 mm (0.016 0.004 inch).
Increase in the clearance between the ends of the top piston ring for each 0.03 mm (0.001 inch) increase in the cylinder liner bore is 0.08 mm (0.003 inch).
Thickness of new top piston ring is 3.845 mm (0.1514 inch).
2 1 344-5153 Piston Ring Install the intermediate piston ring with the side marked "Up-2" toward the top of the piston. Orient the white stripe face to the right of the end gaps of the piston ring.
Clearance between the ends of the intermediate piston ring in a cylinder liner bore of 145.0 mm (5.71 inch) is 0.825 0.125 mm (0.0325 0.0049 inch).
Increase in the clearance between the ends of the intermediate piston ring for each 0.03 mm (0.001 inch) increase in the cylinder liner bore is 0.08 mm (0.003 inch).
Thickness of new intermediate piston ring is 2.94 mm (0.116 inch).
3 1 246-5659 Piston Ring The ends of the oil control piston ring should be at a distance of 180 degrees from the ring end gap when the oil control piston ring is assembled. The green stripe faces to the right or left of the piston ring end gap.
Clearance between the groove and the new oil control piston ring in a cylinder liner bore of 145.0 mm (5.71 inch) is 0.55 0.15 mm (0.022 0.006 inch).
Increase in the clearance between the ends of the oil control piston ring for each 0.03 mm (0.001 inch) increase in the cylinder liner bore is 0.08 mm (0.003 inch).
Thickness of new oil control piston ring is 2.980 0.010 mm (0.1173 0.0004 inch).
Width of groove in new piston body assembly for oil control piston ring is 3.020 0.010 mm (0.1189 0.0004 inch).
4 1 524-5565 Piston Pin Thoroughly lubricate the piston pin