Common maintenance methods for electronically controlled diesel engines 1. First outside and then inside When the engine malfunctions, first check the possible malfunctioning parts other than the electronic control system. This can avoid a fault that is not related to the electronic control system, but the system’s sensors, computers, actuators, and wiring are complicated and…
Injector total oil return test Detection Tool Fuel return hose (part number 3164618) 2 open wrenches (17# and 19#) Measuring cylinder (100ml range) Torque wrench (with 22# fork head) INLINE (INSITE is a kind) Computer with INSITE service software Barrels for collecting fuel Steps Install the oil return hose Use a wrench (19#) to remove…
1) Yuchai unit pump R01/R02 Diagnostic location: in front of the co-pilot/in the relay box/near ECU/above the accelerator pedal/near the instrument panel/in the fuse box near the left front wheel, etc.; Diagnosis seat shape and configuration: Shape: Flat 4-pin -> AK-35 is recommended; Configuration: power cord (1), ground wire (1 or), signal wire (2); Note:…
The common rail injection system of diesel engines has a common feature, that is, there is a common high-pressure fuel accumulator, called common rail. The high-pressure fuel supply pump is only responsible for supplying high-pressure fuel to this accumulator, and is not responsible for controlling fuel quantitative and injection timing. The task of managing fuel…
In the TICS fuel injection pump electronic control system, ECU (engine control unit) has a fault self-diagnosis function, which can detect the working conditions of each part of the control system. When the ECU detects the fault signals from the sensors and actuators, it immediately lights up the “CHECKENGINE” (check engine, also called fault self-diagnostic…
Key points for troubleshooting of injector blockage: 1. No fault code or fault code content has nothing to do with the injector; 2. The rail pressure can reach above 25MPa when starting; 3. There is a pulse voltage signal in the injector circuit. Key points for troubleshooting of injector jams: 1. No fault code or…
Common faults and solutions of fuel injectors The fuel injector is a precision device with very high precision (the most precise of which is the most precise needle valve and needle valve body), which mainly accepts the fuel injection pulse signal sent by the ECU, and precisely controls the fuel injection volume. Generally, fuel injectors…
HEUI technology introduction and technical advantages Introduction to HEUI The hydraulically driven electronically controlled unit injector (HEUI, also called medium-pressure common rail injector) fuel system uses engine lubricating oil pressurized to a high pressure to drive the injector plunger to produce high-pressure diesel fuel. technology. This technology is the same as the high-pressure common rail…
Six-cylinder engine diesel pump The high-pressure fuel pump is the main component of the diesel fuel supply system. Its basic function is to provide high-pressure diesel fuel to the injectors regularly and quantitatively. Whether the entire diesel engine can operate normally, the diesel engine high-pressure oil pump plays a vital role. Today, we will…
As a leader in the non-road engine industry, Caterpillar has begun to launch engines that meet the fourth stage in recent years. Today I want to introduce to you the engine of the 349F excavator C13. I believe that many maintenance personnel have seen this engine, and today we will introduce the engine’s fuel system…