Locomotive demolition: (1) Before demolition, it is necessary to understand and be familiar with the locomotive's performance, structure and relevant technical data. Unfamiliar locomotives should not be dismantled blindly without clarifying the assembly structure and relevant technical data. (2) Remove dirt and mud from the outside before disassembling, and put the oil and water in the net cleaner. To prepare the parts for storage, place the parts in an orderly manner. Do not place them directly on the ground or pile them together. Fine and delicate parts should be washed as soon as possible, coated with anti-rust oil or immersed in diesel oil pots, and covered to prevent dust intrusion. (3) Demolition should be carried out purposely. It is for inspection and repair. Therefore, it should be known and targeted before demolition. It is not necessary to disassemble the parts that can be determined to meet the technical requirements without disassembly inspection. If the oil pump passes the test on the test bench, if the oil supply of the oil press meets the technical requirements at a fixed speed, it means that the oil pump meets the requirements and it does not have to be disassembled. Reducing unnecessary disassembly will not only reduce the workload but also extend the life of the parts. However, if it is difficult to confirm the state of the technology without dismantling, or if it is considered to be defective or suspect after preliminary inspection, it must be disassembled for further inspection or repair. (4) There must be a certain sequence of parts removal. It is generally from the whole to the assembly, from assembly to parts, from parts to parts, from outside to inside, from top to bottom, from simple to complex. However, the parts that are easily damaged should be removed first, which can ensure the smooth disassembly work. (5) Use special tools and standard tools for disassembly to ensure that parts are not damaged and improve work efficiency. Such as the removal of nuts, bolts should use a variety of open wrenches and special socket wrenches, as far as possible without a spanner wrench, so as not to damage the corners of the nut. For parts that must be pulled out or pressed out with special tools, hammers or other items must not be smashed. When using vise and press, you must attach a soft cushion (such as copper plate, aluminum plate and wood plate) to the force surface of the machine to prevent damage to the machine. (6) The removed parts such as bolts, nuts, pins, and washers should still be attached to the removed original parts to avoid misplacement or loss. If some parts should not be put back to the original position, you can use the wire to put on or tie up the cloth to indicate the site for installation. (7) When disassembling relatively complicated, precise and important parts, be sure to remember the number, mark, direction and position of the parts. Pairs of fittings should be matched as they are to avoid mess. (8) When disassembling the tight fittings, check whether there is any additional fixing position such as pins or screws. If yes, it should be removed first to prevent damage. When removing the rolling bearing from the shaft, the inner ring should be strengthened. When removing the rolling bearing from the housing, the outer ring should be forced. For tapered or shouldered parts, remove them in only one direction. Locomotive Assembly: (1) Each assembly should be carefully cleaned before assembly. During the assembly process, it should be kept strictly clean. Any dirt present on the assembly surface and non-assembly surface may cause the parts to wear abruptly and even prevent the locomotive from operating normally. Drilled, reamed or boring parts are blown with compressed air. For example, after boring the spindle on the cylinder block, the lubricating oil channel must be carefully cleaned and flushed to prevent metal chips, dirt, and cotton yarn from entering the oil channel. (2) On the friction surface of the part, the lubricant should be applied during assembly so that the machine can be sufficiently lubricated at the start of operation. After the blanket oil-retaining ring is cleaned, it must be soaked in the oil to allow the oil to penetrate. (3) Pay special attention to the mounting position for some parts. Improper installation, the light machine can not be operated, and the serious ones will damage the parts and even affect the normal operation of the machine. (4) When replacing liners during repairs, be sure to pay strict attention to their thickness, because the thickness of the mat often determines the device gap between the parts, which affects the technical performance of the machine. In the installation, both sides of the liner should be coated with a layer of grease (except for the engine cylinder gasket). The liner must not be bent, cracked, uneven in thickness, or overlap with each other. (5) Special tools and equipment should be used as far as possible during assembly. Fittings of interference fittings are generally pressed together to avoid striking with a hammer. If you really need to use, you can use a soft hammer such as copper or wood to strike lightly, it is forbidden to knock hard and damage the parts. Fittings with a large amount of interference can be fitted with a heat jacket when assembled. Lubricating the contact surface during assembly helps to press in and reduce the press-in force. (6) When tightening the bolts and nuts, do not use spanners as far as possible, and use various standard special wrenches or open-end wrenches. For bolts and nuts of important parts, use torque wrenches to tighten them according to the specified torque. (7) Every bolt, nut lock, wire, and split pin must be carefully inspected. All cracks, wrinkles, and other defects must be replaced. Ensure that the lock is safe and reliable. (8) Parts that have oil passages, oil holes, and tubing must be repeatedly checked for compatibility between the oil hole and the oil hole. (9) The parts to be positioned must be verified with each other's position, direction, or sign during installation, and the clearance should be adjusted to ensure the normal operation of the parts. If the piston and connecting rod should pay attention to the direction during assembly, the timing gear should ensure the correct timing of oil supply, ignition and gas distribution. (10) The bolts and nuts shall be erected during installation, and the surfaces that are attached to the parts shall be smooth and smooth to prevent damage to the threads and loosening. Tighten the bolts and nuts, and they must be symmetrically crossed from the inside to the outside in order of strength, and be gradually tightened. After the connecting bolts are fixed, the head should expose 1-3 threads. (11) The installation seals should be tight, and there should be no leakage, leakage, or leakage. (12) During installation, it is necessary to prevent missing fittings, misplaced fittings, scratched fitting surfaces, and foreign objects from falling into the machine. (13) Assembly of key connectors. The key connector must transmit a considerable amount of force during operation, and therefore the force surface needs to be accurately matched, otherwise the key and the keyway may be quickly damaged. The key should fit tightly in the keyway on the shaft, and in the keyway of the part that is connected to the shaft, the two sides are the middle and there should be a certain gap above.
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