Cross - district operations of agricultural machinery maintenance strategy

Author:Dekenag  Alice

Operation and maintenance of belts

Before loading, unloading, and installation, first check whether the active wheel, passive wheel and tensioning wheel are on the same plane. Generally speaking, the allowable deviation is 2-3 mm when the center distance of two belt wheels is less than 1 meter, and 3-4 mm when the center distance is greater than 1 meter. If the deviation is too large, it should be adjusted to meet the requirements before installation and tensioning. During loading and unloading, the tensioning wheel should be loosened first, or one end wheel plate of infinite speed change should be unloaded first, and the belt should be loaded or unloaded. When the new triangular belt is too tight for loading and unloading, one belt pulley should be unloaded first, and the pulley should be installed after the belt is sheathed or unloaded, and the pulley should not be hard unloaded. Generally, the v-belt should be unloaded and loaded.

The tension of the tension belt is adjusted by the tension wheel. If the belt is too tight, it will wear seriously, and if it is too loose, it will slip easily, and the triangular belt will wear seriously and even burn out. Generally, when two wheels are about 1 meter apart, press the middle of the triangle belt with your fingers, and it should drop down 10-20 mm vertically. The tension of the triangular belt should be checked during use and adjusted at any time.

After replacing the actual effect of the triangular strip, it should be replaced in time. If multiple v-belts are used together, if one or part of them is effective, several other belts should be replaced at the same time, and the old and new belts should not be used together.

Washing triangle strip stained with butter, oil and other oil is easy to produce skidding, and accelerate the damage of triangle belt, should be cleaned with gasoline in time, can also be cleaned with alkaline water and other cleaning agents, can not take oil operations.

The working temperature of the triangle belt should not exceed 60 degrees generally. The inspection method is: after stopping working, touch the triangle belt with your hand immediately. If the heat is too hot to stop for 1 minute, it means the temperature is too high.

In the process of replacing the pulley, the pulley may be deformed, cracked, worn or loose of the bearing or the key and worn around the hole, etc., and the relevant parts should be repaired or replaced in time.

When maintaining the harvester after the end of each season operation, the triangular belt should be removed and hung in the ventilated dry place, or the tensioning wheel should be loosened to make the belt relaxed. Service and maintenance of chain.

When the chain is disassembled and installed, the chain should be wrapped around the sprocket first, and then put into the chain pin. When it is put into, it should be put inside and out, so that it is easy to operate when installing the connecting plate and locking from the outside. When disassembled, the hammer can be used to gently rotate the two joint pins on the same joint board, pull out the pin and remove the chain. If the chain pin has been rivet thicker, can be rolled flat before disassembly.

Tensioning chain tension too tight easy to increase wear, too loose easy to produce shock and jump. When one side of the chain is tightened, the other side should have 20-30 mm/m in the vertical direction. Do not fit the two chains. If the sprocket tensioning wheel has been adjusted to the limit position, it still cannot meet the tensioning requirements, the chain link can be removed or added. But old and new links cannot be mixed.

When the vibration and impact of the climbing teeth of the chain is too large, it should be replaced in time. Sometimes, the chain can be used in reverse to produce better results. When replacing the chain, if the sprocket is worn seriously, it may not cooperate well with the new chain, it should be replaced at the same time. But if the sprocket is symmetrical to the right and to the left, the sprocket can be used in reverse and may be well matched.

Lubrication should be maintained on time and daily, and lubrication should be done carefully. When lubrication, oil should be applied to the mating surface of chain sleeve, pin and sprocket, and brush can be applied evenly. Be sure to lubricate the parking lot in case of danger.

As there is a lot of dust in the operation of the chain, it is easy to stick to the mud, the transmission is not smooth, should be cleaned regularly, can be first in gasoline or diesel clean, and then soaked in oil boiled for about 30 minutes, waterlogging out dripping before use.

After each season of operation, the chain should be removed and boiled in oil, and put in the yellow oil package in the dry place, sprocket or diesel to be cleaned, and butter to prevent rust.

Use and maintenance of bearings

Ball and groove wear, gap too large, produce radial and axial sloshing, should be replaced in time. If some ball bearings wear seriously, the old bearings of the same type can be removed wearing light, no pitted ball replacement.

Lubricating oil shall be provided for. Automatic centering bearings with sealing at both ends need not be lubricated during operation. They should be unloaded at the end of the working season and lubricated through the holes of the sealing cover.

When loading and unloading the bearing, the bearing should not be hard hit hard, special attention should not be knocked on the coat of the bearing, the bearing should be gently knocked on the inner ring.

Agricultural machinery (product catalog) maintenance skills

It is difficult to clean the iron filter of air filter with diesel oil. If you dip the filter element into diesel, you can ignite. When the fire is extinguished, the filter core is knocked with a stick to remove the soot.

As a matter of fact, if the rotor type oil pump used for S195 diesel engine with air inside the pump is not drained, there will be a failure to pump oil. The trick is to fill the oil with a medical-cost syringe, fill the inlet of the pump, and turn the motor pump so that the oil is exported.

Bridge repair high-pressure oil pipeline the connection of the convex head at both ends of the high-pressure oil pipe with injector and oil outlet valve is ensured by the processing precision of contact surface and the fastening force of pipe joint nut. Once the contact surface is worn and oil leakage occurs, a round copper sheet can be cut off from the waste cylinder and a small hole can be made in the middle to be inserted between the convex end and the concave end.

It is not easy to remove the dirt and dirt in the rotor oil filter. If the inner wall of the rotor is covered with a layer of paper with butter, and soil is attached to the paper, the paper will be removed during maintenance, so that soil can be removed from the roof.

Clean the two big loofah loofah with peeling and seeding, clean them and put them in the water tank, and replace them regularly.

It is very difficult to remove the external elastic baffle of the reduction gear in the df-12 manual transmission. At this point, with an iron wire, one end passes through the hole on the retainer ring and is tightened, the other end is wrapped and tightly pulled with the screwdriver, and the retainer can be removed with a few turns back and forth.

The sealing ring of the hydraulic oil pump of the old taishan -25 tractor is easily damaged. A simple remedy is to connect one end in a raised pattern and one end in a concave pattern (to prevent entry into the air) using a wire with the same diameter as the damaged seal ring.

After replacing horizontal type 195 diesel engine basin oil pump plunger pair or outlet valve pair, when installing the oil pump back to the original position, the cylinder race on the oil pump should be transferred to the stop oil supply position, and then the fuel pump is loaded back. In this way, the ball head and the slot exactly aligned, installation is convenient and time saving.

Cause of battery's early damage

The battery is used in parallel with the battery which is short of power. The battery which is high in power is charged by a large current, causing the active substance of the plate to fall off.

Without analyzing the reason, the density of electrolyte decreased obviously when distilled water was added randomly.

Arbitrary addition of electrolyte results in high density of electrolyte.

Neglect of regular replenishment leads to long-term battery loss.

The battery is often overcharged, causing the active material to be loosely separated from the grid.

The vents of the battery cover are blocked, causing the temperature and pressure of the battery to rise and even causing the battery to explode.

The electrolyte level is too high, and the electrolyte overflow from the vents of the battery cover makes the positive and negative pole connected to form a loop, causing the battery to discharge itself and corrode the pole.

The new battery cannot be charged for the first time, or undercharged or overcharged.

Disassembly technique of rust dead screw and nut

Removal of rusty dead screws and nuts: use kerosene soaked screws and nuts for 20-30 minutes before screwing out, or use a hand hammer to knock on the screws, around the nuts, and after shattering the rust layer.

Wring a little in, then wring out, repeatedly wring loose, gradually wring out.

Heat the nut with a blowtorch or gas torch, causing it to expand and loosen quickly.

Disassembly of head screws: if the head screw is exposed, file a flat mouth on it. Then use a wrench out, or saw the groove after the screws out.

Drill a small hole on the end face of the bolt, drive into a polygon bar, turn the bar with a wrench to screw out the screw.

Drill a hole on the end face of the head screw, and screw out the screw by putting in the screw.

Weld a nut on the broken head screw and unscrew the nut to remove the screw.

For the part of the hole and the unhardened screw, the broken bolt can be drilled out, and the enlarged screw hole can be re-tapped, and then the big bolt or stepped bolt can be used.

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