Crankshafts such as part # 30R-0580 receive reciprocating motion from the pistons via connecting rods and convert it to rotary motion. Cat crankshafts are heat treated during initial production, using a patented hardening process for outstanding wear characteristics and high strength. We test every crankshaft for genuine Caterpillar reliability.Attributes:• Cat Reman UTN crankshafts are new crankshafts, which can typically be ground to undersize for a second life.• Cat Reman UTN crankshafts provide new performance and reliability at fraction-of-new costs with return of a qualifying core.• All Cat Reman products come with a same-as-new, 12-month Caterpillar Limited Warranty 1 against Caterpillar defects in material and/or workmanship.• Cat Reman offers off-the-shelf availability. 21 Warranty can vary by model and application; limitations apply. For complete details about the applicable Caterpillar Limited Warranty, contact an authorized Cat dealer.2 Part may not be available off-the-shelf at all times and in all locations.