PTO Power Take-Off Assembly for PC1250-8 Excavator The PTO Power Take-Off assembly for the PC1250-8 excavator transmits engine power to the hydraulic pump system. Part Numbers: 21N-38-00080, 21N-38-00082, 21N-38-00090 Product Description The PTO Power Take-Off assembly for the PC1250-8 excavator is responsible for transmitting engine power to the hydraulic pump system. It is compatible with the PC1250-8, PC1250LC-8, PC1250SP-8, and PC1250-8R models. Symptom Continuous humming