To repair and repair agricultural machinery is like treating a patient to a doctor, not only to diagnose the location of the fault, but also to analyze the cause of the fault and the impact on other parts. To achieve the purpose of accurate diagnosis, you must be familiar with the structure and principle of the locomotive. The commonalities and personalities of past failures, the root cause, and thorough repairs. Otherwise small problems often lead to big accidents. Give two examples:
Example 1: An Oriental Red-802 track tractor ploughs and smashes the ground, destroys the gear teeth of the 2nd and 3rd gears in the gearbox, checks the bearing clearance of the 27709 front end of the second shaft, and finds that the bearing clearance adjusts the gasket rural information network. Copyright has been pumped out, indicating that two 27709 bearing wear is serious, remove the gear inside the gearbox and replace the gear and bearing. Soon after the work, the gears of the 2nd and 3rd gears were again called. However, other crews changed the batch of new sliding gears and performed normally, indicating that there was no quality problem with the new gears. Finally, when the gearbox was disassembled, it was found that the second axis of the gearbox had slight bending and the amount of bending was about 2-3. Only the second axis was suspected to be bent. After replacing the second axis, no similar failure occurred in this part so far. The fault of this example is due to the serious wear of two 27709 skeletal tapered roller bearings, resulting in excessive radial clearance of the second shaft, which causes the front end of the shaft to move downwards under the frequent action of external variable loads. The front end of the second shaft will jump up and down or have a tendency to jump, causing the shaft to produce flexible bending and permanent deformation and gear meshing abnormalities. This shows that 27709 bearing wear, the need to shimming pads, if necessary, to replace 27709 bearings, or the second axis of bending deformation will once again break the 2nd, 3rd gear sliding gear.
Example 2: When a harvester was working on an X6105 diesel engine, the third cylinder exhaust valve rod was broken into the cylinder and the cylinder head was damaged. After repair, the work was normal. However, there have been minor glitches such as broken valves and valves (more frequent occurrence of one or six cylinders). With the passage of time and the increase in the number of repairs, the phenomenon of black smoke in the sweeping pipes of the aircraft has intensified. It was thought that it was due to aging and incomplete combustion, and it did not care. In fact, at this time the operator should be aware that this repeated valve breakage and blistering phenomenon must have other lesions not eradicated. Due to the missed opportunity, the final locomotive was once again paralyzed. The situation was that the first and the sixth cylinder valves shattered, the first cylinder valve fell off, and the cylinder head and piston were damaged. When the timing gear cover is opened, the timing gear mark can be on; check the valve timing, find that the opening and closing time of the intake/exhaust valve is seriously lagging behind, after many twists and turns, finally remove the crankshaft pinion, and the truth is that the pinion and the crankshaft are matched. Rolling keys.
Chimney Cake Machine,Commercial Chimeny Cake Oven,Electric Chimney Cake Oven,Kitchen Equipment Chimney Cake Oven
Guangzhou New Power Catering Equipment Manufacturing Co.,Ltd , https://www.gznewpower.com