Hitachi Excavator Parts 4438684 Middle Arm Repair Kit

This product is a specialized sealing repair kit for hydraulic cylinders in excavator middle arms (boom/arm), belonging to the hydraulic cylinder sealing repair kit. It has excellent oil resistance, wear resistance, high and low temperature resistance, and sealing performance, which can effectively prevent hydraulic oil leakage, restore the normal working state of the oil cylinder, and extend the service life of the equipment. Suitable for daily maintenance and major repairs of excavator boom cylinders. Hitachi series: EX550-5 JPN、EX600H-5 JPN、EX750-5、EX800H-5、ZX450、ZX600、ZX650H、ZX800、ZX850H、ZX670-5A Complete the various key components such as sealing rings, retaining rings, O-rings, etc. required for the maintenance of the middle arm oil cylinder. High precision manufacturing, dimensions meet OEM standards, easy installation, and can reduce downtime. High quality materials ensure stable sealing performance even under heavy loads and harsh working conditions. Suitable for hydraulic system maintenance of construction machinery such as excavators and forestry machinery.