7926920170 Original Loader Hose Tubing for ZW310-5A

The original hose (part number 7926920170, common number KC7926920170) is a genuine hydraulic pipeline component of Hitachi ZW310-5A wheel loader, mainly used for the high-pressure hydraulic system of this model, such as the oil connection of the boom, bucket cylinder or steering system. ZW310-5A is a 31 ton wheel loader from Hitachi Construction Machinery, typically equipped with a Cummins QSM11 engine (rated power of 236 kW) and a hydraulic system with a rated working pressure of 29.4 MPa. The universal number 7926920170 of this hose is its unique identifier in Hitachi's original accessory system, ensuring complete matching with the specifications of the host connector, pipeline routing, and operating pressure. When placing an order, it is necessary to provide the complete model and serial number of the loader for verification to avoid mismatches.

This product is a high-pressure hydraulic hose specifically designed for construction machinery, following SAE J517 or GB/T 3683 standards. It adopts a multi-layer steel wire braided (or wrapped) reinforced rubber structure, with an inner layer of nitrile rubber (NBR), a middle layer of high-strength steel wire skeleton, and an outer layer of weather resistant and ozone resistant synthetic rubber or polyurethane sheath. Its design needs to meet the long-term reliable transmission requirements of the loader under high pressure of 29.4MPa, high-frequency pulse, vibration, and temperature difference environment from -40 ° C to+100 ° C, such as for high-pressure pipelines from the main pump to the multi way valve, valve to the oil cylinder, etc. The diameter, length, bending radius, and joint form (such as 24 ° cone seal or flange connection) of the original hose have undergone strict matching tests to ensure that the sealing integrity and flexibility can still be maintained under system pressure fluctuations.

It is recommended to check the hose for leaks, bulges, cracks, outer cracking, loose joints, or abnormal wear every 500 hours of work or once a month. When replacing, it is necessary to thoroughly release the system pressure, clean the joint sealing surface, and use the original 7926920170 pieces. Tighten them evenly according to the torque specified in the maintenance manual (usually 40-60N · m) and sequence to avoid twisting or excessive bending. The storage environment for hoses should be kept cool and dry in daily life, avoiding contact with ultraviolet rays, ozone, strong acid/alkali solvents, and sharp edges. Regular maintenance can effectively prevent pump and valve damage caused by hydraulic oil leakage, system pressure loss, and pollution, ensuring stable operation and service life of equipment.