I-EX1200-5 4445136 sprocket iyingxenye ebalulekile emkhakheni wemishini yokwakha, ikakhulukazi ngemishini esindayo njengabambayo nama-bulldozers. Ukuqonda ukusebenza nokunakekelwa kwayo kubalulekile ochwepheshe ababambe iqhaza ekukhiqizeni nasekucubungula izingxenye zemishini. I-srocket idlala indima ebalulekile ku-drivetrain yale mishini, okwenza lula ukudluliswa kwamandla.