Engineering machinery fault emergency repair skills - Solutions - Huaqiang Electronic Network

Single chip microcomputer STM32L151CCU6

Probe domestic high current needle 150 head diameter 3.0 thread needle high current needle total

Factory direct sales - solid capacitor - patch aluminum electrolysis, to ensure that the factory first-class goods!

1. When the equipment is repaired, it is often encountered that the bolt has been disassembled many times, the hexagonal head is worn out, and the wrench cannot catch the bolt head. At this time, if the operation space permits, you can take a hammer and force it on the bolt head. After a few times, the hexagonal head of the bolt is roughened by the pier, and then the wrench is placed on the hexagonal head and slowly unscrewed. If this method still does not work, consider finding a small pipe wrench and slowly unscrewing the screw. The bolt must be considered for replacement during installation.
2. In the repair work of the equipment, it is often encountered in the original part of the interference fit, such as between the inner ring of the bearing and the shaft or between the outer ring of the bearing and the hole, which is loose due to wear and can not be processed on the shaft or hole. At this time, the method that can be adopted is to use a pointed tweezers to cut out some pits on the shaft (or hole) of the mating part, and the entire contact surface is full, and then assembling, can achieve good results.
3. The connecting rod bearing using the ball bearing is often easily damaged. After the damage, the outer ring of the bearing is still embedded in the connecting rod hole and it is difficult to remove it, and the hard hitting hardly causes the connecting rod to be damaged. At this time, the connecting rod can be clamped on the vise, and the ferrule in the heavy-duty socket wrench is used. One side uses a ferrule that is slightly smaller than the outer ring of the bearing to bear against the outer ring of the bearing, and the other side is slightly smaller than the hole of the connecting rod bearing. The large ferrule is placed against the side of the connecting rod hole, and then the vise is gradually clamped so that the outer ring of the bearing is slowly pressed out. When there is no vise, you can also use these two sets of tops, put them on a solid ground and gently tap the outer ring with a hammer.
4. The pin bushings of the pins of loaders, excavators, etc. are damaged due to long-term use or lack of lubrication. If the method is not paid attention to when replacing, the pin bushings are not installed properly, causing the ends to be damaged and cannot be used. The necessary losses and time wasted. In this regard, the pin sleeve can be sleeved on the corresponding pin shaft, the appropriate amount of grease is applied to the pin seat hole, and the pin shaft is placed in the center of the pin sleeve hole, and then the shaft end is hammered by the hammer. The pin head presses the pin sleeve into the pin sleeve hole. This method does not damage the pin bushing, does not cause skew, and is simple and reliable.
5. The joint surfaces of the gearbox, differential, various pumps, etc. are usually sealed with a gasket, and an oil-resistant sealant is applied to the gasket to increase the sealing effect, but if there is no sealant at the moment, it can also be used. The paint is replaced; the paint is more viscous and hardens after drying, so that the seal is reliable and the effect is good. If the rear axle differential of the wheel loader is faulty, the paint on the rear bridge cover is coated with a layer of paint due to the absence of sealant after repair.
6. When cleaning the engine oil sump, the inner surface of the engine or the gearbox, if the iron filings and impurities are too difficult to wash, you can use a proper amount of dough to suck, which can be thoroughly cleaned. Household detergents can be used to clean mechanical parts, especially for cleaning rubber parts, and will not swell and deform after washing. It is very good to use detergent powder and sawdust to clean the parts with lubricating oil.