How to overhaul agricultural machinery after the w

  • Detail

How to repair agricultural machinery after floods

because the flood contains a lot of sediment and corrosive substances, after agricultural machinery is soaked in water for a long time, sediment and other impurities will 1. Turn on the power switch and stay in the machine, abrasive will form on the friction surface, block in the through hole and channel, and corrode the machine parts. It must be completely disassembled, carefully inspected, carefully cleaned and repaired

1. Diesel engine

(1) wash the sediment and impurities on the surface of the diesel engine with clean water, and drain the waste diesel oil, waste engine oil and cooling water in the engine

(2) try to fix the crankshaft flywheel with sticks, ropes, etc., and do not drive it before cleaning in the cylinder, so as to prevent sand from entering the cylinder and damaging the cylinder

(3) remove the intake pipe, exhaust pipe, oil tank, fuel injector, cylinder head cover, cylinder head, oil pipe, diesel and oil filter, air filter, oil pan, oil strainer and other parts, and clean them with clean diesel oil. All kinds of paper filter elements and paper mats should be replaced

(4) clean the sediment in the cylinder with a brush dipped in gasoline (or diesel), and then remove the piston connecting rod group for cleaning

(5) if the cylinder liner, piston ring, valve and valve seat ring are rusted, they should be derusted or ground. If the corrosion is serious, they should be replaced with new parts

(6) disassemble the fuel injection pump, fuel injector and fuel transfer pump, and clean them with clean diesel oil; When the three precision coupling parts are slightly rusted, they can be coated with engine oil for mutual research. If the corrosion cannot be eliminated after mutual research, they should be replaced

(7) thoroughly clean the crankcase, oil pump, oil radiator, oil pipe, timing gear chamber, crankshaft neck purification oil chamber, etc. with diesel oil to ensure that the lubricating oil circuit is unblocked

(8) remove the sediment impurities in the radiator of water tank, water jacket and water channel hole with clean water, and blow the impurities in the water channel with air cylinder or compressed air

(9) carefully clean and dredge all through holes and small holes for ventilation or oil storage on the diesel engine; Carefully check whether the mating parts are damaged, and the damaged parts should be replaced in time

(10) wipe the surface of spare parts, apply clean engine oil on the mating surface, assemble the diesel engine according to the technical requirements, and add enough diesel, engine oil and cooling water

(11) after the diesel engine is assembled, start the test run, check whether there is oil leakage, water leakage, air leakage, and whether there is abnormal sound. If there is any abnormality, stop the machine immediately for inspection and elimination

2. Refer to the above diesel engine for the maintenance of tractor supporting power. Before overhauling the chassis and electrical equipment, clean the sediment and dirt on the surface of the tractor with clean water before overhauling

(1) remove the clutch and remove water and debris. If the clutch spline shaft is rusted, remove the rust with emery cloth, so that the driven plate can move flexibly on the spline shaft; Then clean all parts in the clutch with gasoline, dry them and reassemble them. Pay attention to adding grease to the release bearing and clutch bearing

(2) drain the gear oil in the gearbox and rear axle, add an appropriate amount of diesel, support the rear axle, start the engine (or rotate the suspended drive wheel quickly by hand), drive each gear to run for 3-5 minutes with first gear or reverse gear respectively, and drain the cleaning oil. If the discharged cleaning oil contains a lot of sediment impurities, it should be cleaned again until the sediment in the tank is removed, and then add new gear oil as required

(3) disassemble the relevant parts of the brake system, remove the mud and debris in the brake system, clean the brake master cylinder, slave cylinder and friction plate with gasoline, and replace the brake fluid; If pneumatic braking is adopted, the accumulated water in the air reservoir shall be discharged, and the air pump, brake control valve and air filter shall be cleaned with gasoline

(4) oil and lubricate the steering system, walking system and other accessories after cleaning, so that the mating parts can move flexibly without jamming

(5) remove the dirt on each electrical terminal with a brush dipped in gasoline. If the terminal posts and joints are rusted, they should be polished with emery cloth and welded firmly; The generator, motor, electric horn, wiper and all instruments should be disassembled and cleaned, and should be replaced if damaged; The battery should be replaced after being soaked in water

(6) there are many air vents (such as gearbox, rear axle housing, hydraulic oil tank, battery cover, etc.) on the tractor, which are easy to be blocked after being soaked in flood. Pay attention to dredging

(7) after the maintenance, start the tractor to see whether the chassis has abnormal action, abnormal smell and abnormal sound. If any fault is found, it should be eliminated immediately

3. Combine

(1) electrical department. Carefully check whether there is water in the electrical components. If there is water, dry it with hot air; If there is damage, replace the damaged part

(2) engine. Refer to diesel engine for maintenance technology of engine

(3) hydraulic part. Replace the hydraulic oil again

(4) transmission part. Replace the transmission oil

(5) clean the traveling device, threshing device and header, and replace the butter

4. Motor

after the agricultural motor is soaked in water, wash the dirt on its surface with clean water first, and then disassemble it for inspection. During disassembly, do not rotate the motor shaft first to prevent sediment from entering between the rotor and stator and damaging the winding insulation

(1) remove the motor end cover and the drive pulley. If the pulley is rusted on the shaft, soak it in oil, heat the pulley with a blowtorch, and pour water on the motor shaft. After the pulley expands and loosens with the shaft, pull it out immediately with a puller

(2) after the shaft is out of the rotor, remove the sediment and dirt on the bearing, rotor, stator and slip ring with a brush dipped in gasoline

(3) dry it after washing, and check the stator and rotor coils for open circuit, short circuit and open welding with the weak stability meter of Wanguo mining market. If yes, find out the short circuit and open circuit parts, and replace the winding or re weld. Also check whether the brush is rusted and stuck in the brush holder, whether the brush pressure is normal, and whether the brush is close to the surface of the slip ring. If any fault is found, it should also be eliminated

(4) dry the winding. The water can be evaporated by baking with incandescent lamp; It can also be placed in a ventilated place to dry naturally. However, it is not allowed to heat with current or bake with open fire to prevent short circuit or damage the insulation layer. After drying, check the insulation performance of each winding coil with a multimeter. If it is found that there is poor insulation, it should be overhauled

(5) fill the motor bearing with grease, reassemble all parts of the motor in turn, and conduct a test run. If there is no problem in the test run, it can be put into use

5. Agricultural implements

ploughs, rakes, chutes, ditching machines, rotary cultivators, straw returning machines, seeders, rice transplanters, threshers, rice mills, pulverizers, flour mills and other agricultural implements and agricultural machinery are soaked in the flood. First, the page generation system organizes the connection address and page content summary of the search effect, and then cleans the dirt on their appearance and inside the machine for users, and then derusting according to their technical requirements Lubrication, repair and storage

(1) rust removal. For the rust stains on the parts with high fitting accuracy such as various journals, use "00" abrasive cloth to polish until the red and yellow rust stains on the surface of the machine parts disappear, and then polish; For gear, pulley and other parts, use "0" abrasive cloth and oilstone to polish and remove rust; For rust stains with low matching requirements or non working surfaces, steel wire brush can be used to remove rust, and file can also be used to remove rust if necessary

(2) lubrication. The working surfaces of all bearings, shaft sleeves, gears, chain drives, hinged parts, adjusting screws and other mating parts should be cleaned with gasoline or diesel and dried with Excel or word. Grease or lubricating oil should be added to make the working parts move flexibly

(3) repair. Check the technical status of agricultural machines and tools. If there are deformation, cracks, corrosion penetration, open welding and other phenomena, correct, repair or replace them, and tighten the bolts at all parts

(4) custody. If agricultural machines and tools are not used for the time being, they should be painted with paint or waste oil after rust removal to protect the mechanical surface (the working surface should be painted with oil or grease for protection), wrapped with plastic bags, and stored in a ventilated and dry place indoors; In order to prevent wood and cotton products from rotting, they should be strictly water-proof. It is best to remove them, wash and dry them, put them on shelves in the room and keep them in a dry place; In order to slow down the aging and deterioration of rubber parts, they should also be removed and stored indoors; In order to prevent the deformation of parts, the stress of parts should be relieved as much as possible, such as loosening the spring, dominating the frame, etc

Copyright © 2011 JIN SHI