4071213 Original Excavator Return Piping Oil Tank Coupling for ZX160

The Hitachi original oil return pipe fuel tank joint, with a universal part number of 4071213, is a genuine original accessory designed specifically for the hydraulic system of Hitachi brand excavators. This connector is mainly used to connect the hydraulic return oil pipeline with the hydraulic oil tank, ensuring reliable oil return. It is widely applicable to multiple hydraulic excavator models from Hitachi, including the ZX series ZX200-3G、ZX210H-3G、ZX240-3G、ZX250H-3G、ZX260LCH-3G、ZX330-3G、ZX360H-3G、ZX370LCH-5G、ZX450LCH-5G、ZX470LCH-5G It is compatible with classic EX series models such as EX200-3, EX220-3, EX300-3, EX350-3, etc.
 

The original oil return pipe fuel tank joint 4071213 usually uses high-strength and oil resistant synthetic rubber (such as nitrile rubber NBR or fluororubber FKM) as the main sealing material, and may have a metal skeleton or threaded interface embedded inside to enhance structural strength and connection reliability. Its design is precise, and the interface size and thread specifications strictly comply with Hitachi's original factory standards. It can achieve a tight and leak free connection with the return hose and tank port. The connector has excellent hydraulic oil resistance, high and low temperature resistance (usually applicable to the range of -40 ° C to+120 ° C), anti-aging and ozone resistance, and can maintain a stable sealing effect under long-term vibration and pressure fluctuation conditions of the excavator.
 

To ensure long-term sealing of the joint and maintain the cleanliness of the hydraulic system, regular inspections and maintenance are necessary. It is recommended to conduct a visual inspection every 250 hours of operation or once a month, with a focus on checking for cracks, deformation, hardening, or bulges in the joint body, and checking for signs of oil leakage at the connection. At the same time, check if the fastening clamps or threads are loose. Keep the joint and surrounding area clean to prevent dust, dirt, and other pollutants from adhering. When cleaning equipment, avoid direct impact of high-pressure water guns on the joint area. It is recommended to check the status of all pipeline joints every 1000 hours or every six months when replacing the hydraulic oil filter element. If obvious aging, cracking, permanent deformation or any signs of leakage are found in the rubber part of the joint, it should be replaced immediately.