The failure of forklift truck is often caused by carelessness of maintenance personnel. Therefore, maintenance personnel should be more cautious when forklift maintenance.
The above is a forklift truck fault due to carelessness of maintenance personnel.
No notice when curing carburetor, 1 spring gaskets fall into the intake pipe, causing the piston to get rid of the anti freeze water plugging loose, causing the oil bottom to be repaired inadvertently, the crankshaft timing gear is bruised by the tool, a convex rise, the convex lifting top of the camshaft and the sealing ring on the engine's abnormal valve guide is not properly installed. No measures were taken to hear the abnormal sound of the engine oil in the exhaust pipe (the connecting rod bearing of the IV cylinder), which caused the shaft scrap bolt to be screwed too tight and damaged, causing the engine to tamper with the cylinder.
Cause of failure:
1 is the poor maintenance and maintenance. No replacement, adding oil or cleaning oil filter, lack of oil or use of metamorphic lubricating oil, deterioration of the lubrication condition, acceleration wear, no replacement of air filter core according to the regulations, making the dirty dirty, the intake volume reduced, the engine work weak, a large amount of dust into the cylinder, accelerating the cylinder wear and working performance. Bad, etc.
2 the quality of illegal operation or assembly is poor. Repair and driving personnel do not strictly observe the operation procedures, adopt wrong habits, adjust and assemble, do not meet technical standards, etc.
3 the quality of defective parts or replacement and addition of oil is poor.
4 barbaric dismantling, tight not loose (nuts, pistons, bearings), parts dirty.
5 forklift truck maintenance is not mandatory according to the regulations. It causes the parts to produce wear, deformation, loosening and dirty, such as cleaning "three filters" and replacing lubricating oil according to the prescribed mileage.
6 parts are missing.
7 forklift trucks. For example, the forklift truck, such as the new forklift or the overhaul of the forklift, does not carry out the rule of closing, extirpates the speed limit sheet in advance, with the load in advance, overloading and overspeed operation, etc.
8 the repair process is bad and the inspection is not fine. For example, when assembling the crankshaft, flywheel and clutch assembly, its balance performance is destroyed, or because of the lack of equipment, incomplete detection means, and so on without check.
9 do not assemble or adjust according to the prescribed clearance. For example, when the gap between the piston and cylinder is greater than the regulation, when the gas channeling, power drop, and fuel consumption are less than the regulation, the piston cylinder card will be stagnant. The valve clearance adjustment is not at that time, the power is reduced, the oil consumption is rising, the machine is seriously different. The ten is the line connection and the part mistreatment. Battery battery. Accumulator battery If the connection is wrong, it will burn the generator diode adjuster and the magnetic connection column if they are connected to each other. It will cause the control contact to burn the engine crankshaft thrust sheet back, the crankshaft is easy to move in axial direction, so that the end part of the cylinder bearing face is seriously worn and scraped and even scrapped.
Common human fault prevention measures for forklift truck:
1 carefully handle a variety of pads, such as oil disc or valve cover, because of large contact area, not easy to compact, easy to cause oil leakage. After the crankshaft oil seal leakage, oil will infiltrate the clutch, both oil and the clutch slipped and burned.
2 tighten the nuts according to the repair specifications. Excessive pressure of the loose pressure liner will cause oil around the screw hole to protruded or slip the thread to cause oil leakage. If the oil disc (case) is not tightened or returned to fall off, it will easily cause a large amount of oil loss, and then the "burning and holding shaft" accident occurs.
3 change the failure oil seal in time. The oil seal is not properly installed, the shaft neck and the oil seal edge are not the same. It is very easy to shake off the oil after long use. After long term use, it will lose the elasticity because of the rubber aging, the seal lip damage and crack or the self tightening spring failure. All the oil seal will lose the oil sealing function. It should be repaired or replaced according to the standard.
4 replace the worn parts in time. For example, the cylinder liner, piston and piston ring wear to a certain extent, which will cause high pressure gas in the combustion chamber to enter the crankcase.
5 change the main bearing in time. When the gap between the main bearing and the neck is too large, the oil seal will lose the seal due to the impact of the crankshaft, causing the oil to leak out of the head of the crankshaft or to infiltrate the oil into the clutch, thus polluting the friction disc and causing the skid and work failure.
6 avoid one way valve and ventilation valve. After the valve hole is blocked, the temperature and pressure in the box will rise, the piston movement resistance, the oil consumption increase, the oil and gas are full of space, the oil consumption increases and the replacement cycle shortens. The oil leakage in the seal is often caused by the pressure difference between the inside and outside of the case. Cleaning to keep the one-way valve and ventilation valve open.
7 properly solve all kinds of oil pipe joint seal. Pipe connection nut is often disassembled, easy to break off because of slipping thread break, so that the accuracy of the two joint bell mouth is poor, because the cone center line does not coincide with the bad contact, because the taper is different and not identical, which causes the oil seepage. It should be sealed in the grinding tube joint with the bell mouth or the thin copper leather clip in the two cone. After the face, tighten and compact the nut to ensure the seal.
8 avoid the wheel shedding oil. When the wheel hub bearing and the lubricating oil in the cavity are too much, or the wheel hub oil seal is not properly assembled, the quality is bad, the aging failure and the brake frequently cause the high temperature of the wheel hub and the loosening of the half axle nut, it is necessary to use the cavity lubrication method (that is, proper lubrication), dredge the air hole, use the brake properly, and strictly use the brake. Select quality accessories and assemble and adjust according to process specification.
