Teach you how to repair, dismantle and assemble forklift engines

We all know that the forklift engine is the core part of the forklift. In order to avoid the failure of the forklift engine as much as possible and cause the operation to stop, we should learn more about the engine structure and learn more maintenance skills! First of all, we must know that the maintenance of the forklift engine is divided into these four parts: ① disassemble the engine; ② clean the parts; ③ check the wear and tear; ④ assemble the engine. 1. How to disassemble the engine? First, remove the engine from the lithium pallet truck. It must be carried out when the engine is completely cooled, otherwise it will cause deformation of some parts. 1. Water is discharged from the engine cooling system, and engine oil and hydraulic oil are discharged from the engine and hydraulic transmission. 2. Remove the safety shed and seat, remove the radiator cover, and remove the exhaust pipe muffler. 3. Remove the foot pedal, remove the radiator, exhaust pipe and its accessories. 4. Disassemble the connecting parts (hoses, ducts, etc.) of the engine and hydraulic transmission and other systems. 5. Decompose the connection between the engine and the main drive (universal joints, etc.). 6. Hang the engine on the lifting equipment and unscrew the plug bolts connected with the frame. 7. the engine with lifting equipment and place the engine on the bench. 2. How to disassemble the forklift engine? 1. Remove the cylinder head and gasket. When removing the cylinder head, do not use a screwdriver or other sharp tools to avoid damage to the cylinder head gasket. 2. Remove the clutch from the engine. Before removing the clutch, check whether there are marks on the clutch cover and flywheel. If not, mark them, and then remove the clutch fixing bolts. 3. Remove the oil pan, gasket, oil pipe and oil pump. 4. Remove the valve. All valves are marked to prevent the position from being reversed, and the valve seat is also marked on the cylinder head. ①Check whether there is a mark on the top of the valve. If there is no mark, mark the top of the valve with a steel head in order (marking must be done when the valve is closed. It is not allowed to use a file as a mark on the edge of the valve top or on the valve stem) . ②Press down the spring baffle plate and spring, and use needle-nose pliers to remove the lock pin. ③Take out the valve, valve spring and spring pad. 5. Remove the piston connecting rod assembly. Each piston connecting rod group should be disassembled separately. To ensure correct installation, the big end and cover of the connecting rod should be marked with the cylinder number, and the sequence of numbers should be followed by the front end of the engine water pump. ①Remove the connecting rod nut, remove the connecting rod end cap, gasket and bearing, and separate them in order. ②Push the connecting rod upward to separate the connecting rod from the journal. Push out the piston connecting rod assembly (if the cylinder mouth is ground into a step, it should be flattened first) to avoid damaging the piston ring. ②After the piston connecting rod is taken out, the connecting rod, cover, gasket, bolts and nuts should be installed back as they are to prevent confusion. 6. Remove the starting claw and the crankshaft pulley, and then pull out the crankshaft pulley hub with a push-pull device. 7. Remove the cover, box body and timing gear of the distribution conveyor. When removing the timing gear, first check whether there is a mark on the timing gear. If there is no mark, put corresponding marks on the two gears (when the first cylinder is at the top dead center position). ①Remove the piston ring from the piston. ②Remove the piston pin and put it in the order of the marks on the top of the piston. Drain the oil first, and then disassemble the valve cover and rocker arm from top to bottom. The big pump, the cylinder head, the timing gear flywheel, the flywheel housing, then open the oil bottom, unload the oil pump, first unload the small tile and make a mark to poke the piston, and then unload the large tile to make a mark. The crankshaft, remove the eccentric shaft, and poke out the cylinder liner, basically even if it is completely disassembled. 3. Clean the parts Clean the dismantled parts with a brush soaked in diesel oil or detergent. Scrape out the sealant at each bonding point clean. Drain the cleaned parts and arrange them separately. Fourth, check the wear and tear 1. First look at the color and quality of the oil, whether there are iron filings on the surface, and look at the viscosity of the oil. For example, there are a lot of iron filings in the engine oil, indicating that the crankshaft or connecting rod bushes must be ground, or even the crankshaft is worn. If the machine is very viscous, it means that the oil has not been changed for a long time. 2. When disassembling the crankshaft of the connecting rod piston, observe the conditions of the connecting rod bearing and crankshaft bearing. If it is found that the entire connecting rod cannot be used after being ground, if the crankshaft is not severely ground, it can be used after grinding the shaft. . 3. Observe the wear of the cylinder liner, and pay attention not to hit the engine body when disassembling the cylinder liner to prevent damage.
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