The Maintenance and Repair Guide for Bulldozers (Part 1

Fuel system

1. The fuel used for diesel engines must be selected in accordance with the relevant provisions of the "Fuel Use Regulations" and in combination with the local working environment, suitable diesel. The specifications and performance of diesel should comply with the provisions of GB252-81 "Light Diesel".

2. The oil storage vessels should be kept clean.

3. The new oil should undergo a considerable period of sedimentation treatment (preferably seven days and nights), and then be slowly sucked out and filled into the diesel tank.

4. It is best to fill the diesel tank of the bulldozer with diesel immediately after the operation is completed to prevent the gas in the tank from condensing and mixing into the oil. At the same time, the oil used the next day should be given a certain period of time to allow water and impurities to settle in the tank for easy removal.

5. When refueling, keep the operator's hands clean of the oil drum, diesel tank, refueling port, tools, etc. When using an oil pump, be careful not to draw up the sediment at the bottom of the bucket.

6. When refueling. No fire is allowed nearby.

7. The oil level should be checked frequently. When it is less than the lower limit mark on the dipstick, it must be replenished.

The filter screen at the fuel filler port should be cleaned once every 100 hours.

9. Each diesel filter should have its sediment removed in a timely manner according to the working environment, but the maximum interval should not exceed 200 hours. After removing the sediment, venting should be carried out to avoid problems such as difficult starting and insufficient power.

Cooling system

1. Use of cooling water:

Distilled water, tap water, rainwater or clean river water should be used as the cooling water for diesel engines. It is strictly prohibited to use dirty water or hard water (well water, mineral water and other water with high salt content) to avoid scaling and corrosion of the cylinder liner. Only under hard water conditions must it be softened and replenished before it can be used.

(2) When adding water to the radiator, it may not be possible to fully fill the cooling system at one time. After the diesel engine starts running, it should be checked again. If it is insufficient, it should be filled up. The water inlet of the cooling system is located at the top of the small top cover of the bulldozer.

(3) Under continuous operation, the cooling water should be replaced every 300 hours or so. There are five drain valves for the cooling system of the bulldozer diesel engine: 1 is located at the bottom of the radiator; 2 is located at the lower part of the water-cooled oil cooler of the diesel engine. 3 is located at the front end of the diesel engine, at the circulating water pump. 4 is located at the left front of the transfer case, on the diesel engine block. 5 is located at the lower end of the water tank outlet pipe.

2. Use of antifreeze:

Antifreeze can be used in extremely cold and low-temperature conditions.

Air filter

If the air filter is carefully maintained technically in accordance with the usage regulations, not only can its service life be prolonged, but it can also provide a good working condition for the diesel engine. Therefore, the following points should be noted when using it:

The paper filter element of the engine should be removed every 100 to 200 hours of operation. It should be cleaned by vibrating or blowing compressed air (with a pressure not exceeding 0.49 MPa) from the center of the filter element outward or gently tapping its end surface. It is strictly forbidden to clean it with any oil or water.

The paper filter element should be replaced with a new one every 1,000 to 2,000 hours of operation.

The internal safety filter element should be replaced every 3,000 to 4,000 hours of operation.

4. When installing the paper filter element, it must be reliably sealed without air leakage or short circuit.

5. If the paper filter element is clogged with oil, water or other contaminants, causing the engine exhaust to be too thick, and the situation still cannot be improved after cleaning the filter element or if the paper element is damaged, a new filter element should be replaced.

6. The connecting pipelines between the air filter outlet and the diesel engine intake pipe, as well as the connection points between the air filter dust collection chamber and the exhaust ejector rubber hose, should be sealed reliably without any air leakage.

7. When the diesel engine is in operation, it is strictly prohibited to remove the air filter.