I. Overview Technical maintenance is a very important job. It is not only good for the bulldozer to operate safely, but also to extend the service life. Therefore, before and after the work, the bulldozer should be inspected and maintained as required. During the operation, attention should also be paid to the occurrence of abnormalities in the operation of the bulldozer, such as noise, odor, vibration, etc., in order to timely discover the problem and solve it in time to avoid serious consequences due to the deterioration of minor faults. At the same time, technical maintenance is well done, and it can also extend the large and medium repair cycle of the bulldozer and give full play to its effectiveness. Second, the fuel system 1. Diesel engine fuel must be selected according to the relevant provisions of the “Oilation Regulations†and the suitable diesel oil in combination with the local working environment. The specifications and performance of diesel oil shall comply with the provisions of GB252-81 "Light Diesel". 2. The oil storage vessel should be kept clean. 3. The new oil should be treated for a long time (preferably seven days and nights), then slowly sucked out and poured into the diesel tank. 4. The diesel in the diesel engine of the bulldozer is preferably filled up immediately after the operation to prevent the gas in the tank from condensing into the oil. At the same time, the oil for the next day has a certain time to allow water and impurities to settle in the tank for removal. 5. When refueling, keep the operator's hand cleaned for oil drums, diesel tanks, fuel fillers, tools, etc. When using the pump, be careful not to draw the sediment from the bottom of the bucket. 6, when refueling. It is strictly forbidden to have a fire nearby. 7. The oil quantity should be checked frequently. If it is less than the lower limit of the oil dipstick, it must be filled. 8. The filter at the fuel filler is cleaned every 100 hours. 9. Each diesel filter should remove the sediment according to the working environment in time, but the interval should not exceed 200 hours. After the sediment is removed, the deflation should be carried out to avoid problems such as difficulty in starting and insufficient power. Third, the cooling system 1, the use of cooling water: (1) Distilled water, tap water, rain water or clean river water should be used as the cooling water for diesel engines. It is forbidden to use dirty water or hard water (well water, mineral water and other water with much salt) to avoid scaling and immersing the cylinder liner. Only under hard water conditions, must be softened and replenished before use. (2) When adding water to the water tank, the cooling system may not be fully added at one time. After the diesel engine is running, it should be checked again. When it is insufficient, the foot should be added. The cooling system water inlet is located on the top of the bulldozer's small top cover. (3) In the case of continuous operation, the cooling water should be replaced every 300 hours or so. There are five water discharge gates for the bulldozer diesel engine cooling system: 1 at the bottom of the water tank; 2 at the lower part of the diesel engine water-cooled oil cooler; 3 at the front end of the diesel engine, circulating water pump; 4 at the left front of the transfer case, on the diesel engine body; The lower end of the water outlet pipe. 2, scale treatment: The scale of the diesel engine cooling system should be treated every 600 hours. In the case of scale treatment, it is generally first washed with an acidic cleaning solution and then neutralized with an alkaline aqueous solution. By chemical reaction, the water-insoluble scale is converted into a salt dissolved in water and eliminated with water. The specific operation process is as follows: (1) Remove the thermostat of the cooling system. (2) Start the diesel engine and raise the water temperature to 70-85C. When the floating scale is turned up, immediately turn off the fire and release the water. (3) Inject the prepared acidic cleaning solution into the water tank, start the diesel engine, run at 600-800r/min for about 40 minutes, and extinguish the cleaning liquid. Preparation of acidic cleaning solution: Add three acids in clean water in the following proportions: Hydrochloric acid: 5 to 15% Hydrofluoric acid: 2 to 4% Glycolic acid: 1-4% Stir well and use. Further, an appropriate amount of polyoxyethylene alkyl allyl ether may be added as needed to improve the permeability and dispersibility to scale. The use temperature of the acidic cleaning solution is preferably not more than 65 ° C. The preparation and use of the cleaning solution can also be carried out with reference to the relevant contents in the "135" series diesel engine service manual. (4) Then, a 5% aqueous solution of sodium carbonate was injected to neutralize the acidic cleaning liquid remaining in the cooling system. Start the diesel engine and let it run slowly for 4 to 5 minutes, then turn off the flame to release the aqueous sodium carbonate solution. (5) Finally, inject clean water, start the diesel engine, and make the running speed high and low. Rinse the residual solution in the cooling system with clean water, and cycle for a while to extinguish the water. According to this process, the cycle was operated several times until the discharged water was checked for neutrality with litmus paper. (6) Within 5 to 7 days after cleaning, the cooling water should be replaced every day to prevent the residual scale from blocking the water discharge and cutting the door. 3. Use of antifreeze: Antifreeze can be used under severe cold and cold conditions. Fourth, the air filter The air filter is carefully maintained according to the regulations of use, which not only prolongs the service life of the air filter, but also provides a good working condition for the diesel engine. Therefore, you should pay attention to the following items when using: l. The engine should take out the paper filter for every 100 to 200 hours of operation. Use a method of vibrating or compressed air (pressure not greater than 0.49 MPa) to blow outward from the center of the filter or gently tap the end face. Do not use any oil or water. Cleaning. 2. Replace the new paper filter after every 1000 to 2000 hours of operation. 3. The internal safety filter should be replaced every 3000 to 4000 hours. 4. The paper filter element must be reliably sealed when installed, and must not leak or short circuit. 5. If the paper filter element is blocked by oil, water, etc., the exhaust of the engine is too thick. If the filter element cannot be improved after cleaning the filter element or the core is damaged, the new filter element should be replaced. 6. The connecting line between the air filter outlet and the diesel engine intake pipe, the connection between the air filter dust collecting chamber and the exhaust ejector rubber tube should be sealed reliably and must not leak. 7. It is strictly forbidden to remove the air filter when the diesel engine is running. Concerned about surprises Label: Bulldozer and diesel engine maintenance knowledge Previous: The development of new wear-resistant agricultural machinery parts Next: Maintenance tips for construction machinery parts This Rubber Coupling Elbow is designed for use with our No-Hub drain products. It is made of strong rubber with stainless steel fasteners for fitting. 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