218-5429 New Aftermarket BUSHING Fits CAT. Models E70,E70B,307,307B,307C,307SSROne New Aftermarket Replacement H Link Closed End Bushing Fits Caterpillar (Fits CAT) Mini Excavators This sleeve bearing bushing is an H Link closed end bushing used in the pin and bushing assembly at pivot points on the excavator linkage, including the dipper arm and bucket linkage. Pin and bushing assemblies are critical wear components on heavy construction equipment and require periodic replacement to maintain proper articulation and reduce play