SHAFT 6L1912 - Caterpillar

9S2263 Top Ring (1) has the mark "UP-1.".9S2264 Intermediate Ring (2) has the mark "UP-2".**Install 1P708 Oil Control Ring (3) with the gap in the spring 180 ° away from the gap in the ring. Use 5P3519 PISTON RING GROOVE GAUGE to check top and center ring grooves with straight sides. For instructions on the use of the gauge, see the GUIDELINE FOR REUSABLE PARTS; PISTONS AND CYLINDER LINERS, Form No. SEBF8001. (4) Bore in piston for pin ... 2.0006 .0003 in.(50.815 0.008 mm) Clearance between pin and bore in piston ... .0003 to .0013 in.(0.008 to 0.033 mm)Maximum permissible clearance (worn) ... .002 in.(0.05 mm)Pin diameter ... 1.9998 .0002 in.(50.795 0.005 mm) When installed in the engine, the "V" mark on top of the piston must be in alignment with the "V" mark on the cylinder block.