Without dismantling and inspection, the loss and waste caused by blind disassembly can be avoided. Here are some practical methods for high efficiency and low consumption.
Observe the failure of the machine by looking at the abnormal appearance of the machine. Such as exhaust pipe smoke color; whether the appearance of the machine "four leakage" phenomenon; oil temperature, oil pressure is normal; whether the light is bright, the speaker is crisp and so on.
Feel the feelings of the sense of smell and hand to determine and analyze the cause of the malfunction. If you touch the bearing shell, feel the temperature change; touch the high pressure tube to feel the pulsation strength of the oil pressure; the nose olfactory friction sheet has no burning odor and so on.
The screening is troublesome for some inconvenient inspections or inspections, and there are no failure factors for the inspection method. It does not directly perform inspections, but instead checks and eliminates other failure factors in order, and the last remaining part is the real cause of the failure.
Auscultation uses a special stethoscope or a long screwdriver to select appropriate parts for auscultation in a certain order. The auscultation site should generally be selected on the side of the housing of the auscultation part. The various mating parts of tractors move with each other, and the sounds emitted when tapping can usually be distinguished: small parts touch small parts with small sound, crisp and sharp; large parts touch large parts with loud and heavy sound; small parts touch large parts, like The hammer strikes the anvil; the shaft collides with the bearing, and the sound is dull.
The broken cylinder in turn stops the fuel supply or ignition of a certain cylinder and observes the change of the fault sign to determine which cylinder has failed.
When probing and analyzing faults, there is suspicion about a certain part or part, and it is replaced with a spare part with good technical status. Then, according to the change of signs before and after the change of parts, it is determined that the technical state of the original part is normal.