7922610119 Original Loader Hose Oil Pipe for Hitachi ZW310-5A

The original hose/oil pipe part number 7922610119 is a hydraulic or fuel system pipeline provided by Hitachi Construction Machinery for the ZW310-5A wheel loader (with a total working mass of 22.4-22.9 tons and a rated load capacity of 5000kg). This hose is mainly used for transporting hydraulic oil, diesel or lubricating oil, connecting key components such as hydraulic pumps, control valves, oil cylinders, oil tanks, etc. Its common models may include Hitachi loaders of the ZW310-6 and ZW330-5A series, as well as similar tonnage models such as ZW250 and ZW350. As an integrated design of the original factory, it is deeply matched with the vehicle pipeline system, and the use of non-standard auxiliary parts is strictly prohibited to ensure sealing reliability and system safety.

This product is an original high-pressure hose assembly, which adopts a four layer structure: inner rubber layer (nitrile rubber NBR), reinforcement layer (high-strength steel wire weaving/winding), outer rubber layer (weather resistant chloroprene rubber CR), and joint (carbon steel galvanized or stainless steel). Main technical parameters: working pressure ≥ 25MPa, burst pressure ≥ 100MPa, working temperature range -40 ℃ to+120 ℃, minimum bending radius ≥ 150mm. The joint form is standard flange or compression type (such as JIS B8363, SAE J517), equipped with O-ring seal. This hose complies with ISO 1436 and GB/T 3683 standards and is suitable for harsh working conditions such as high pulse, high vibration, and multiple steering of loaders. It can effectively resist oil corrosion, ozone aging, and external wear.

Inspection cycle: It is recommended to check the appearance of the hose for bulges, cracks, oil leakage, and wear every 250 working hours; Check the joint tightening torque and pipeline fixing clamps every 500 working hours. Installation points: 1 Ensure that the hose runs naturally (avoiding twisting, excessive bending, and contact with sharp edges); 2. Reserve appropriate length (to compensate for thermal expansion, contraction, and equipment swing); 3. Tighten the joint according to the standard torque (usually 80-120N · m); 4. After installation, conduct a pressure test on the system (gradually increase to 1.5 times the working pressure and hold for 5 minutes without any leakage). Fault diagnosis: If the system pressure is unstable, the action is slow, or there is oil leakage, it is necessary to check whether the inner layer of the hose is peeled off, the joint is loose or aged; If there are longitudinal cracks on the surface of the hose, it indicates ozone aging and should be replaced immediately. Preventive maintenance: It is recommended to replace all high-pressure hoses every 2000 working hours; Regularly clean the surface of the hose to prevent oil stains and chemical corrosion. Safety regulations: Before operation, it is necessary to release the system pressure and disconnect the negative terminal of the battery in a clean and ventilated environment; Waste hoses should be disposed of according to the rubber product recycling standards. Always use genuine original parts and operate according to the maintenance manual to ensure long-term stable operation of the hydraulic/fuel system.