In winter, the engine is at a low ambient temperature, and there is a small amount of condensate in the intake and exhaust system due to the temperature difference. When the cold machine of the equipment is started, part of the fuel is not fully burned, and the unburned oil steam and water form steam to be discharged from the engine. At this time, the external temperature of the engine is low, and the steam liquefies rapidly, resulting in the white exhaust gas at startup.
A Hitachi zx360h-3g cooler is hard to start when it is hot, and the excavator still emits white smoke when it is idling. What is the reason?
Fault analysis:
1. The water temperature sensor is aging or abnormal Poor atomization of oil nozzle.
2. The excavator emits white smoke when idling. Check whether the white smoke is burnt or tasteless? If it is burnt, the belt may be too tight Including the generator belt and the air-conditioning belt of the power steering pump. After the belt is too tight, the load on the motor increases when taking a taxi. The speed is low, so it is difficult to start After the car is hot, the belt will become larger due to thermal expansion and contraction, so it is easy to start White smoke is caused by friction between belt and pulley.
3. if it is odourless white smoke, it may be caused by water leakage from the water tank sprayed on the engine body for evaporation, due to poor water circulation in the engine and air.
Related reading:
The engine of Hitachi zx360h-3g excavator stalls due to lack of oil. What is the impact? Generally speaking, the diesel engine will not shut down without oil. It will only burn the bearing bush. Generally, it only needs to replace the bearing bush. In serious cases, the piston, cylinder liner and crankshaft will also be damaged In case of lack of diesel fuel, shut down the engine, add oil and exhaust the air.
What causes the slow motion of Hitachi zx360h-3g excavator? How to repair? The main reason may be that the pilot control oil circuit pressure is too low Main pump pressure or flow below standard The hydraulic oil circuit is blocked and the hydraulic oil filter element is blocked The hydraulic oil filter element is blocked, the copper mesh falls off, and there are many impurities in the hydraulic oil tank The fault cause is "hydraulic oil filter element is blocked" Measure the pressure of the self pressure reducing valve, disassemble it and find that the internal copper filter screen is blocked, the hydraulic oil has been emulsified and deteriorated, and there is water and some impurities in it. The solution to the fault is to clean the hydraulic system for 2 to 3 times, and replace the hydraulic oil and filter element.
