Inter-regional operation of agricultural machinery maintenance Raiders
Belt use repair and maintenance
Before loading and unloading, it is necessary to check whether the driving wheel, the driven wheel and the tensioning wheel are on a plane. In general, the allowable deviation is 2-3 mm when the center distance between two pulleys is less than 1 m, and 3-4 mm when the center distance is greater than 1 m. If the deviation is too large, it should be adjusted to meet the requirements before installing and tensioning. When loading or unloading, firstly loosen the tensioning wheel, or remove the non-polar shifting end wheel first, and attach or remove the belt. When the new V-belt is too tight for loading and unloading, it is necessary to remove a pulley, install or remove the V-belt, and then install the pulley afterwards. The general group V-shaped belt should be removed after the pulley is removed.
The tension of the tensioning belt is adjusted by the tensioning wheel. If the belt is too tight, the belt will be worn too much. If the belt is too loose, slipping is easy to occur and the triangle belt is seriously worn or even burned. Generally about two meters away from the track, press the middle of the triangle belt with your finger and it should be lowered vertically by 10-20 mm. The tension of the V-belt should be checked during use and adjusted at any time.
Replacement of the V-belt should be promptly replaced. If multiple V-belts are used together, if one or part of the V-belt is effective, the other should be replaced at the same time. The old and new belts cannot be used together.
After washing the V-belt stained with grease, oil, grease, etc., it is easy to produce slip, and to accelerate the damage of the V-belts, it should be cleaned with gasoline in time, or it can be cleaned with alkaline water and other cleaning agents.
The working temperature of the V-belt is generally not to exceed 60 degrees. The inspection method is: immediately after the job is stopped, immediately touch the V-belt by hand. If the hand stays on it for 1 minute without feeling hot, the temperature is not high. If you are too hot to park for one minute, it means that the temperature is too high. You should find out the reason and eliminate it in time.
The belt pulley may have deformation, cracking, bearing wear or looseness of the key, wear of the peripheral hole, etc. during belt pulley replacement. The relevant parts should be promptly repaired or replaced.
When maintaining the harvester after each season, the V-belt should be unloaded and hung in a ventilated and dry place, or the tensioning wheel should be loosened to make the belt relaxed. The use of the chain repair and maintenance
When the chain is disassembled and installed, the chain should be wound around the sprocket first, and then the chain pin should be penetrated. When passing through, the chain should be worn from the inside to the outside to facilitate the installation of the connecting plate from the outside and the locking operation is convenient. When disassembling, you can use a hammer to gently rotate the two connecting pins on the same connecting plate, pull out the pins and remove the chain. If the chain pin head has been thickened, you can flatten and then remove it.
The tightness of the tensioning chain is too tight to increase the wear, too loose and easy to produce impact and jitter. When the general chain is pulled tight, the other side should have an active clearance of 20-30 mm/meter in the vertical direction. Do not attach the two chains. If the sprocket tensioning wheel has been adjusted to the extreme position and the tensioning requirement is still not achieved, the chain link can be removed or increased. However, the old and new links cannot be mixed.
Replacement When chain chain vibrations and impacts are too large, they should be replaced in time. Sometimes the chain can be used in reverse, which can produce better results. When replacing the chain, if the sprocket wears badly, it may not work well with the new chain. Replace the new sprocket at the same time. However, if the sprocket is symmetrical, using the sprocket in reverse may work well.
Lubrication should be done on time according to the requirements of daily maintenance, and do a good job of lubrication. When lubricating, grease should be applied to the mating surface of the chain sleeve and pin and sprocket, and the brush can be evenly applied. Always lubricate when parking to prevent danger.
Cleaning Due to the dust in the chain work, it is easy to stick with the sludge, and the transmission is not smooth. It should be cleaned regularly. It can be cleaned in gasoline or diesel oil first, then boiled in the oil for about 30 minutes, and then drained and reused.
After the end of each season, the chain is unloaded in the oil and boiled, wrapped in butter and put in a dry place, sprocket application or diesel scrub, coated with butter and rust.
The use of bearing repair and maintenance
Ball and groove wear, excessive clearance, resulting in radial and axial shaking, should be replaced. If the individual ball wear is severe, the worn out, non-pricked steel ball can be replaced on the same old model bearing.
Lubrication should be specified. Self-aligning bearings sealed at both ends, do not need to be filled with lubricant during use, should be removed after the end of the working season, from the small hole in the seal cover, such as grease lubrication.
When loading and unloading the bearing, hard knocks should not be made. Special attention must be paid to the bearing's jacket. Tap the bearing's inner ring gently.
Agricultural machinery maintenance skills
In addition to the iron filter of the iron filter air filter, it is difficult to clean it with diesel oil. If the filter element is stained with diesel, it can ignite and burn. After the fire is extinguished, the filter element is knocked with a wooden stick so that the soot falls off and the dirt inside and outside the filter element can be completely removed.
The rotor oil pump used in the S195 diesel engine of the engine oil pump may be omitted. If the air in the pump is not drained, there will be a failure to pump oil. The trick is to fill up with a medical needle and fill it with the oil at the inlet of the pump and turn the oil pump to make the outlet out of the oil.
The bridge repairs the connection between the nose of the high pressure tubing of the high pressure tubing and the injector and the outlet valve. The sealing accuracy is ensured by the machining accuracy of the contact surface and the fastening force of the union nut. Once the contact surface is worn and leaking oil, a round copper skin can be cut from the waste cylinder and a small hole can be strung in the middle, between the convex head and the concave head.
It is not easy to remove dirt and dirt from the dirty rotor oil filter in the fine filter. If a layer of paper is applied on the inner wall of the rotor with butter to allow the dirt to attach to the paper and the paper is removed during maintenance, the dirt can be removed from the roof.
In addition to the scale, two large peeled, seeded old loofahs are cleaned and placed in a water tank, which can be replaced regularly.
In addition to the deceleration gear external elastic retaining ring, it is very difficult to disassemble the outer elastic retaining ring of the reduction gear in the Dongfeng-12 type manual transmission gearbox. At this point, with a wire, one end through the hole in the ring after the tightening, the other end with a screwdriver around the tightly pulled, and then rotate the drive wheel back and forth a few times, the ring can be removed.
Cleverly modified seals Old Taishan-25 tractor hydraulic oil pump seals are most vulnerable to damage. The simple remedy is to use a wire (length cut according to the circumference of the pump groove) of the same LV core plastic bag with the same diameter as the damaged seal ring. One end is in a convex shape and one end is in a concave shape (to prevent air from entering). can.
After the fuel injector is replaced by the injector of the horizontal type 195 diesel engine, after the oil pump is returned to its original position, the column match on the oil pump should be set to stop the oil supply position. Fuel pump installed. In this way, the ball head and the slot are exactly aligned, and the installation is convenient and saves time.
Cause of early damage to the battery
The battery with a sufficient amount of electric power is used in parallel with a battery that is depleted, and a battery that is fully depleted of electric power is charged with a large current, resulting in the active material of the electrode plate falling off.
Reasonable addition of distilled water without analysis causes a significant decrease in electrolyte density.
The electrolyte is added arbitrarily, resulting in too high an electrolyte density.
Ignoring regular recharging causes long-term depletion of the battery.
The battery is often overcharged, causing the active material to loosen from the grid.
The vent plug of the battery cover is blocked, causing the battery temperature and pressure to rise, and even causing the battery to explode.
The liquid level of the electrolyte is too high, and the electrolyte overflowing from the vent hole of the battery cover makes the positive and negative poles communicate with each other to form a circuit, causing the battery to discharge itself and corroding the pole.
The new battery cannot be charged for the first time, or it is undercharged or overcharged.
Rust dead, broken screws, nut removal tips
Remove the rusted screw and nut: Use kerosene to infiltrate the screw and nut for 20-30 minutes and then unscrew it. You can also use the hand hammer to strike the screw and tighten the rust layer and wring out the screw around the nut.
Twist in a little, twist it out, unscrew it, and unscrew it gradually.
Use a torch or gas torch to heat the nut and allow it to expand quickly after being heated.
Broken screw removal: If the broken screw is exposed to the outside, you can make a flat mouth on it. Use a wrench to unscrew it, or cleave it and use a screw.
A small hole is drilled on the end face of the broken head screw, a polygonal steel rod is driven, and the screw can be screwed out by turning the steel bar with a wrench.
Drill a hole in the end face of the broken head screw, reverse the thread in the hole, and screw in the counter wire screw to unscrew the screw.
A nut is welded to the broken head screw, and the nut is screwed to remove the screw.
For broken holes and unquenched screws, the broken bolts can be drilled, the tapped holes can be re-threaded, and then bolts or stepped bolts can be used.
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