One New Aftermarket Replacement Worm-Circle Drive Gear Fits Caterpillar (Fits CAT) Motor GradersThis aftermarket replacement worm-circle drive gear (also cataloged as a gear worm) is a key component of the circle drive system on Fits Caterpillar motor graders. The worm gear meshes with the internal ring gear of the circle assembly, allowing the operator to rotate the moldboard and adjust blade angle during grading operations. This is a wear component in the circle drive -- Fits Caterpillar service documentation notes that the circle worm drive and worm gear should be replaced as a set when worn.Specifications Dimensions: approximately 13.4 x 4.8 x 3.9 in. Weight: approximately 14.3 lbs. Compatible ModelsFits Caterpillar Motor Graders: 120G, 120H, 120H ES, 120H NA, 12G, 12H, 12H ES, 12H NA, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 143H, 160G, 160H, 160H ES, 160H NA, 163H, 163H NAReplaces Part Number(s):9D1142, 9D-1142, 3120782, 3120782-A, 9D1142-ANew aftermarket replacement part - not remanufactured, not used.
