3089853 Original Excavator Hydraulic Suction Pipe Pump Inlet Pipe for ZX70 ZX80

Part number 3089853 is the official part number for Hitachi's original hydraulic suction pipe (pump inlet pipe). This component is the key connecting pipeline of the hydraulic system oil supply circuit, responsible for smoothly and leak free delivery of hydraulic oil from the hydraulic oil tank to the suction port of the main hydraulic pump, providing stable and sufficient oil supply for the entire hydraulic system. It is the basic component to ensure normal oil suction of the hydraulic pump, prevent cavitation and cavitation. As an original standard component, it is mainly suitable for Hitachi's various medium and large hydraulic excavators, such as ZX200-3, ZX240-3, ZX270-3, ZX330-3, ZX350-3, ZX360-5, and is also compatible with some EX series models.

The original hydraulic suction pipe is a key component in the low-pressure pipeline of the hydraulic system. Its core function is to introduce oil from the oil tank into the pump with extremely low pressure loss under the suction force of the hydraulic pump. At the same time, it must have good flexibility and anti collapse ability to prevent the pipe wall from being compressed and blocking the oil flow under the suction negative pressure of the pump. It usually adopts a high-quality synthetic rubber inner rubber layer with multi-layer structure, which is oil resistant, ozone resistant and anti-aging. The middle is wrapped with a high-strength steel wire woven or wound reinforcement layer, and the outer layer is wear-resistant and environment resistant synthetic rubber or synthetic fabric. It is equipped with precision metal joints at both ends and has built-in sealing rings or adopts a flat sealing design to ensure reliable sealing with the oil tank and pump body interface.

The maintenance core of this hydraulic suction pipe lies in regularly checking its physical condition, sealing performance, and ensuring correct installation to prevent hydraulic pump suction caused by pipeline problems. Fault symptom: if the hydraulic system has abnormal pump sound (sharp squeal), slow and weak action, abnormal oil temperature rise or increased foam in the oil tank, it may be that the oil suction pipe leaks, is blocked or the internal delamination causes poor oil suction. Once the pipe body is found to be damaged, it should be stopped immediately for replacement, as air entering the hydraulic system can seriously damage the pump and valve. Daily maintenance should keep the outside of the pipeline clean and avoid contact with corrosive substances such as fuel and solvents.