163-3749 Bushing Fits CAT EL200B, 318BL, 318BLN, 320, 320L, 320B, 320BLOne New Aftermarket Replacement Dipper at Bucket Link Bushing Fits Caterpillar (Fits CAT) Excavators This aftermarket replacement bushing installs in the dipper at the bucket link position on Fits Caterpillar (Fits CAT) track excavators, a high wear pivot point in the excavator's attachment linkage. Keeping this bushing in good condition is essential for maintaining tight, precise bucket control and preventing accelerated wear on adjacent pins and