1154168421 Original Excavator Parts Fuel Injection Pipe for 6WG1

Part number 1154168421 is the original fuel injection pipe (high-pressure fuel pipe) provided by ISUZU (Isuzu) for the 6WG1 series large displacement diesel engine. This component is the core pipeline of the ultra-high pressure common rail fuel system, dedicated to connecting the high-pressure fuel pump and the common rail pipe, responsible for delivering extreme high-pressure fuel exceeding 300MPa. Its universal models cover all Hitachi ultra large mining equipment equipped with 6WG1-TAA2 engines, mainly including Hitachi EX3600-5/6, EX2600-5, ZX850-5, ZX870-5G and other ultra large hydraulic excavators and mining dump trucks with a capacity of over 80 tons. As a designated component of the original factory, its length, bending curvature, joint specifications are precisely matched with the layout of the engine compartment and the pressure characteristics of the common rail system. It is strictly prohibited to use any form of auxiliary parts or substitutes. Any mismatch may lead to pressure fluctuations, fuel leaks, damage to the common rail system, and even high-pressure injection causing fires.

This product is an ultra-high pressure multi-layer steel wire wrapped reinforced fuel hose assembly, with a structure identical to the picture you provided. The pipe body adopts a special synthetic rubber inner layer, with at least four layers of high-strength steel wire winding reinforcement layer in the middle, and an outer layer of weather resistant, oil resistant, and wear-resistant synthetic rubber. The surface is silver gray and should be a special coating with anti-corrosion and wear-resistant properties. The pipe label "HD 40G/1" in the picture is the core parameter identification. "HD" usually represents high-pressure diesel, "40" may refer to the nominal inner diameter or pressure rating, and "G" may represent the steel wire winding structure. The two end joints are made of precision forged alloy steel, using a 24 ° conical or spherical seal combined with a special metal sealing gasket (black part in the picture) to ensure absolute sealing under ultra-high pressure. One end is a hexagonal nut used to connect the common rail pipe; The other end is an external threaded interface used to connect to a high-pressure oil pump. Its burst pressure is usually above 900MPa, with a working temperature range of -40 ℃ to+135 ℃, and can withstand high-frequency pressure pulses throughout the entire life cycle of the engine.

Installation specifications: 1 Release pressure: Before replacement, the pressure relief program must be triggered through a diagnostic instrument or the vehicle must be left idle for more than 24 hours. It is strictly prohibited to operate under pressure. 2. Cleaning: Use a lint free cloth and specialized cleaning agent to wipe the joint cone surface and sealing gasket installation surface, ensuring that there are no small particles. 3. Alignment installation: First, manually screw the joint into the first buckle to ensure that the thread is aligned without any jamming. 4. Torque tightening: A calibrated torque wrench must be used, and the torque specified in the maintenance manual (usually 28-32 N · m) must be tightened twice. It is strictly prohibited to use ordinary wrenches to tighten by feeling. 5. Exhaust and testing: After installation, activate the oil pump with a diagnostic tool to establish low pressure. After checking for leaks, start the engine and run it at idle speed. Use a leak detection agent or white cloth to check all joints.