Hydraulic pump coupling assembly. The assembly includes: 1 splined center hub, 1 plastic coupling element, 8 inserts, 8 insert bolts, 2 set screws, 8 roll pins, and 4 cotter pins, for Caterpillar excavator models 318C, 319C, 320C, 320CL, 320D, 320DLLR, 321C, 323D, 323DLN, and many more. Price: $284.37 OEM Part # = 162-6177 Buy Now CATERPILLAR - Hydraulic excavator View Details