Hydraulic Main Pump for PC70-8 Excavator Part Numbers: 708-3T-00161, 708-3T-00151 Product Description The hydraulic main pump models commonly used for the PC70-8 excavator Part Numbers: 708-3T-00161, 708-3T-00151 Common Faults Insufficient output flow of hydraulic pump, slow and weak machine operation Insufficient pressure of steering pump, heavy steering and slow response Abnormal noise during pump operation with housing vibration Oil leakage at pump mating surface and shaft