Explanation of examples of loader launcher inspection and repair
A Liteng LT953 loader, which was installed in 2000, repeatedly accelerated, lifted shovel, lifted arm, pressed down and other successive actions. It was detected that the operation of the loader's initiator was normal. When the heavy load operation was carried out, the initiator would automatically shut down Put into operation normally.
The Liteng LT953 loader has weak performance, flexible maneuverability, and light handle operation. Every driver loves to operate this Liteng LT953 loader, making it smooth in various places, loading materials in concrete mixing stations, and earth and stone transportation. Lai this car. In November 2005, due to the needs of the construction site, the loader was transferred to the site to load soil. When the shovel was lifted reasonably, the engine was turned off. The driver immediately got off the car and propped up the engine hood. After pumping the oil, the engine cover was lowered to start the car operation. When the arm was ready to fall, the engine was turned off again, and the shovel was raised with both arms. After getting off the vehicle again, I did not find any other problems. I continued to pump oil for a while, and then I got into the car. The shovel of the loader was plunged into the mud pile and dug a shovel. At this moment, the operator of the loader automatically turned off the engine again. The operator at this moment was really sad. He took the door and jumped out of the car to invite a teacher to help find the reason. It is reported that this teacher has more than ten years of experience. After careful inspection, he said, "If there is no oil coming into the oil pipe, how can this drive a car?" Through the pump oil inspection, it was found that the oil delivery pump had active oil draining phenomenon (there was no trace of leakage in the low-pressure oil circuit), and it was determined that the fault was on the oil delivery pump. After about an hour, the installation and test run were normal, and the construction site was entered. After less than half an hour of operation, the engine was automatically turned off and it was not easy to get into the car.
Liteng loader repair
Due to the small equipment on the site, the soil excavated by the two R412 rotary drilling rigs on the site has no accumulation direction. If the soil on the site cannot be sorted in time, the two rotary drilling rigs will not be able to construct normally, a 25T steam crane equipped on the site will also not be able to enter the designated position, and the concrete truck will not be able to drive into the site for pouring. At this time, after hearing the situation, the project manager of the construction site hurriedly contacted the repair master to talk about the status of the machine. About thirty minutes later, the repairman came to the construction site next to Taiyu Road, found the driver of the car and asked him about the current situation, and came to the car to conduct a comprehensive inspection.
He checked each fuel line, and started the fuel pump from time to time to check the amount of oil, and then checked the other diesel lines and related parts of the filter screen. The engine was turned off after less than five minutes by cleaning and installing the car test machine. His eyes were on this master. At this moment, the repairman took a deep cigarette and thought about it without saying a word. He carried out a full inspection of the oil circuit again, and finally locked his goal on the diesel tank. He put all the diesel in the entire diesel tank and poured it into Inside the diesel barrel. At that time, the person watching from the side asked aloud, "Master, why are you letting out all the diesel oil, which is very expensive?" The master did not reply to drill into the bottom of the loader, unloaded the oil inlet filter on the oil tank, removed a disc-like thing inside which was covered with sludge. After two cleanings, it was clearly seen that it was made of fine copper wire Filter.
Because the oil tank has been used for too long, it has never been cleaned, so all the corrosive substances inside are adsorbed on the filter screen, and the oil path is not unblocked. When the loader engine is lightly loaded or empty, the normal speed of the engine is generally 850r / min. At this time, the oil flow required by the loader is small, which can satisfy the oil demand of the engine power, so no matter how the engine is tested, Can work normally. When increasing the heavy duty operation of the throttle, because the speed of the engine is suddenly increased from 850r / min to about 1500r / min, and the speed of the fuel pump is also increased by a corresponding multiple or higher at the moment, a lot of fuel flow is required At this moment, the entire fuel supply line was blocked at this moment, and the flow of diesel in the fuel supply pipe became smaller or even no oil was supplied to the diesel pump, which caused the fuel ratio in the incinerator of the engine to not be met. The engine can only be turned off. After two hours of full cleaning and installation, after checking the test run, all operations are normal and the power output is weak.
