I believe everyone has heard that the engine is the heart of the excavator, and its role is very obvious, so it must be maintained on time to prevent problems. It is understood that there are many reasons for the high temperature failure of the engine. Generally speaking, it can be divided into two categories: One is that the engine cooling system is faulty, and this type of problem is the most common. The other type is the failure of the engine itself, which causes too much heat generation and the cooling system can not dissipate heat in time. This type of failure is more difficult to troubleshoot. Below, I will teach you how to solve the high temperature fault of Hitachi ZX330-3 engine!
The first category: failure of the cooling system
1. Check the coolant level first: if the coolant is insufficient, it will directly lead to insufficient heat dissipation capacity.
2. Check whether the radiator is clogged: Due to the harsh working environment of the excavator, wind-sand insects can easily block the pores in the radiator fin. If blocked, it will also cause high-temperature engine failure.
3. Check the belt of the radiator fan: If the fan belt is not tight enough, or the belt is worn and aging, it will cause the belt to slip. The result is that the fan speed is not enough and the heat dissipation capacity is reduced.
4. Check the circulation of the water tank: If the coolant you see is very dirty, then 80% of the cooling system is blocked.
5. Check the water pump: This is relatively simple. Open the water tank cover when the water temperature is low, and then the engine to observe the water fluctuations in the water tank.
6. Check the thermostat: It is relatively simple to check the thermostat. Take it apart and put it in boiling water and observe the opening angle. If it is too small, it is a fault.
The second category: abnormal heat of the engine
1. The engine power is insufficient and the engine is overloaded: If the excavator is overloaded, the engine will generate extra heat, which will bring a great burden to the heat dissipation system.
2. Check for engine failures: artificially increased fuel injection volume causes poor combustion, intercooler performance failure, abnormal injection pressure, and poor lubrication cause excessive frictional resistance, which will cause the machine to emit heat far beyond its designed heat dissipation capacity. Let the heat dissipation system exceed the maximum working capacity and cause the machine to become hot. This type of fault is difficult for ordinary people to solve, and it is necessary to find a professional engine repairer.
3. Check for air leakage in the engine compartment: damaged and leaking mufflers, exhaust pipes, and turbocharger pipes, and the high-temperature exhaust gas that leaks, circulates in the engine compartment, which will seriously cause high temperature in the cooling system.
Engine high temperature is a systematic problem, which is often caused by multiple reasons. In addition to the above-mentioned reasons, there may be many other reasons that cause high engine temperature.
