The main reasons for black smoke from excavators:
-Air filter clogging: air filter clogging will lead to insufficient engine air intake, incomplete combustion of fuel, thus emitting black smoke.
-Engine valve clearance is too small: valve clearance is too small will affect the air intake system, resulting in black smoke emissions.
-Diesel pump fuel supply is too large: too large a fuel supply or poor atomization of the injector nozzle will lead to black smoke emissions.
-Insufficient cylinder pressure: insufficient cylinder pressure will affect the combustion process, resulting in black smoke emissions.
-Malfunction of supercharger: abnormal supercharger will lead to oil into the combustion chamber, resulting in black smoke.
-Hydraulic system failure: hydraulic system failure will lead to excavator operation difficulties and black smoke emissions.
-Dust accumulation on the heat sink: dust accumulation on the heat sink will affect air circulation, resulting in black smoke emissions.
-Improper operation of the driver: the driver’s operation of the throttle is too large will also lead to black smoke emissions.
-Engine overload or carbon buildup: engine overload or serious carbon buildup will lead to black smoke emissions.
-Mismatch of timing gears: Mismatch of timing gears will lead to inaccurate ignition time, thus producing black smoke.
-Poor fuel quality: Using poor quality fuel will lead to insufficient combustion and produce black smoke.
The solution to black smoke from excavator
– Clean or replace the air filter: clean or replace the air filter regularly to ensure that the engine air intake is smooth.
– Check and adjust the valve lash: check the valve lash and adjust it if necessary to ensure that the air intake system is normal.
– Professional maintenance of diesel pumps and injectors: check and repair diesel pumps and injectors by professional maintenance technicians to ensure normal fuel supply.
– Check and repair cylinder pressure: check cylinder pressure and repair or replace related parts if necessary.
– Check and repair the supercharger: check the working condition of the supercharger and repair or replace it if necessary.
– Professional repair of the hydraulic system: send the excavator to a professional repair site to check and repair the hydraulic system.
– Clean the heat sink regularly: Clean the heat sink regularly to ensure smooth air circulation.
– Pay attention to driver operation: Drivers should pay attention to the way they operate the throttle to avoid improper operation.
– Professional cleaning and maintenance of the engine: Have the engine cleaned and maintained by professional maintenance technicians to ensure the combustion effect.
– Use high-quality fuel: Choose high-quality fuel to ensure full combustion and reduce black smoke emission.
