The ignition of the engine of the self loading cement mixer should be short and smooth. After starting, the engine speed should be stable without shaking and noise. Observe whether various instruments and alarm devices work normally. See the following explanation for more precautions.
First of all, listen to the sound of idling. It should be stable and continuous. There should be no metal knocking and other abnormal noises. Cars with good quality should only hear very little noise, and the noise should not be harsh. After starting for a short time, the engine tachometer pointer should be very stable.
The shift of the transmission shall be light and flexible, the gear position shall be accurate, and there shall be no off shift, disorderly shift and abnormal noise. The continuous shift shall be smooth.
The air outlet of the air conditioning system is normal, and it should be able to blow out cold / hot air within a certain time after adjusting the cold / hot air. Adjust the air outlet to be able to close smoothly. Adjust the air circulation mode, such as internal and external circulation, defrosting mode, air outlet mode, etc., and respond immediately. Change the air volume of each air outlet accordingly. The air outlet should not blow out too much dirt and peculiar smell.
Step 4: driving inspection
If the above inspections are all right, the new car will be available soon, but don't be too happy. The latter inspection should be done. The inspection during driving should be more strict.
The starting process should be smooth and there should be no abnormal noise from the engine and gearbox. Pay attention to whether there is a "scream" sound when starting and moving forward. The scream here does not refer to the scream of people, but the sharp sound made by the friction with the pulley due to the aging of the belt, which leads to no friction on the surface.
Drive the car to a wide place and drive at a slow speed. Check whether there is any abnormality, whether the gear is smooth, whether the steering is sensitive, and whether the car body makes abnormal noise during driving.
When accelerating (don't accelerate the new car too quickly), the engine speed should be stable, and there should be no sudden explosion, fire break, flashback and shooting. The corresponding pointer on the instrument panel should respond sensitively. In the process of acceleration, there should be no driving phenomenon when shifting gears, and it should be basically in a stable acceleration state all the time.
When driving at different speeds, the whole vehicle should be stable. When it is stable at a certain speed, the engine should have no abnormal sound, and the corresponding pointer of the combination instrument should be stable without obvious fluctuation. Pay attention to whether the car body will make a "creak... Creak..." sound when driving, like the sound of poor sofa quality.
That's all for the idle speed inspection of the cement mixer engine. If you have any questions or ideas about this, please come to our website http://www.sdzkjf.cn Leave a message!