1154158460 Original Excavator Isuzu 6BG1 Engine Diesel Filter Pressure Relief Hose

Part number 1154158460 is the official part number for the high-pressure oil pipe related to the diesel filter (diesel grid) of the Isuzu 6BG1 engine of Hitachi's original excavator. This component is a key pipeline in the engine fuel system that connects the diesel filter with related pressure relief valves, return lines, or fuel injection pumps. It is responsible for delivering or guiding fuel during the fuel filtration and pressure regulation process, ensuring stable fuel system pressure and smooth return, and may also undertake pressure relief functions. It is an important component to ensure stable engine fuel supply, prevent fuel leakage or abnormal pressure. As an original standard component, it is specifically designed for Hitachi excavators equipped with Isuzu 6BG1 series (especially 6BG1T model) diesel engines. The main compatible models include Hitachi EX200-5, ZAX200-6, and other Hitachi mid size excavators that may be equipped with the same engine.

This original fuel pipe belongs to the high-pressure fuel pipeline. Its core function is to safely and reliably deliver fuel in the pressure relief or return circuit of the diesel filter (diesel compartment). Specifically, it may be used to connect the pressure relief valve on the diesel filter to the return pipe or fuel tank. When the internal pressure of the filter is too high, it guides excess fuel to release pressure and flow back; Or as a connecting pipeline between the filter and the fuel injection pump. It usually adopts a multi-layer composite structure, with an inner layer of synthetic rubber resistant to diesel corrosion, a middle layer of high-strength woven fibers or steel wire reinforcement layer to withstand high pressure, and an outer layer of wear-resistant and weather resistant synthetic rubber or thermoplastic sheath. Both ends of the pipe are equipped with precision metal snap fit joints to ensure the sealing and anti vibration performance of the connection with the filter, pump body or valve body.

The maintenance core of this oil pipe lies in regularly checking its sealing and integrity, and preventing fuel leaks caused by aging and wear. Regular inspection: It is recommended to visually inspect the entire length of the oil pipe for cracks, bulges, hardening, softening, surface oil leakage, or oil stains every 250 working hours or every week. Focus on inspecting the connection between the pipe body and the joint, the bending parts, and the positions where friction may occur with adjacent components. When installing, first tighten the joint by hand, then use a torque wrench to tighten it to the specified torque in the maintenance manual (usually 25-40 N · m), and avoid overtightening. After installation, start the engine, check for leaks, and run for a period of time before rechecking.