Unfortunately, when they disassembled the main pressure oil pump, Peng Huading found that the problem with the excavator was not simply that the overflow valve was inaccurate. It was not just that the hydraulic oil pressure control spring could be solved. The key to the excavator failure was that the main pressure oil pump had an internal leakage.

Because the materials are not up to standard and the processing quality of the oil pump is not good, after long-term friction between each other, there is a large gap between the plunger and the cylinder block of the plunger oil pump, and high-pressure oil constantly leaks from these gaps, causing the oil pressure to fail to reach the rated oil pressure, and naturally it is impossible to drive the main oil cylinder to drive the grab to work normally.

No matter how superb Peng Huading's technology is, he cannot repair the plunger and pump body with wrenches or screwdrivers. To completely solve the problem of excavator, he can only replace the plunger oil pump, or use a precision machine tool to turn and bore the plunger and cylinder block.

Peng Huading looked at the plunger pump and said to Chai Xiande's father: "Uncle Chai, the problem lies in the plunger pump. Either replace the plunger pump or find a machinery factory to repair the plunger pump... I suggest you replace the plunger pump, which is more reliable and the repair speed is also fast."

The three of them looked at each other, and Chai Xiande immediately said, "Dad, I think Peng Huading is right, so I might as well replace the pump. I will ride a motorcycle to the city now, trying to buy the plunger pump overnight, and help us install it while Peng Huading is here."

"Yes! Yes! I'll accompany you. We bought it overnight and replaced it. We will buy a bucket of hydraulic oil by the way." Chai Xiande's uncle immediately agreed, "Xiao Peng, go home and have a sleep first, and wait until we buy a plunger pump before we will trouble you."

If Peng Huading can command them to replace with a new one, then their cost will be almost the only money for the plunger pump, which can save a lot of money. If sent to the city for repair, the transportation and manual costs will be far more than the price of the plunger pump.

Soon, Chai Xiande and his uncle rode a motorcycle to Yuejiang City overnight, and Peng Huading also returned home to sleep.

Although Peng Huading was physically and mentally tired, he was still very happy. What’s more important is that through this maintenance, he had a more specific and vivid understanding of domestic mechanical equipment, and found that he had great potential in this field.

At six o'clock in the morning, Peng Huading got up and finished washing. Seeing that Chai Xiande had not come yet, he told his grandmother that he had gone to work in the city and then went out to walk towards the construction site.

On the way, I happened to meet Chai Xiande, whose eyes were covered with blood.

Seeing Peng Huading coming by himself, Chai Xiande was very moved. While taking Peng Huading to the construction site, he told him about the purchase of the plunger pump. The reason why he bought the plunger pump and hydraulic oil was that the city's designated repair points deliberately made things difficult. After calling for a long time, the other party opened the door. Then he said that he did not ask their master to repair it. They dared not sell the plunger pump, and said that the quality of the plunger pump was not guaranteed.

When Chai Xiande was furious and turned around and prepared to buy a plunger pump in other places, the designated repair center whispered to them.

Peng Huading didn't have too much resentment or anger in his heart. Although the people who were in the fixed maintenance point were unreasonable, it was understandable. They also made hard-earned money, which was much nobler than borers such as Li Guoliang and Wang Guosheng.

However, in front of Chai Xiande, Peng Huading would not say that, but just smiled and did not participate in the comments.

With the plunger pump, the next thing was much easier. Under Peng Huading's command, the three of them started working hard again. After the plunger pump was installed and the hydraulic oil circuit was checked, Peng Huading arranged for Chai Xiande's father to go up and test the machine.

Father Chai climbed into the cab uneasy, bit his teeth, and then started the engine.

When he pulled the joystick of the grab back, the grab was raised gently, and when the joystick was pushed forward, the grab was lowered gently.

When he saw the claws on the grab crawler drilling into the soil and continued to drill downwards, Chai Xiande, who was standing next to him, Chai Xiande's uncle and Peng Huading shouted happily: "It's powerful! It's powerful!"

The grab was quickly filled with a bucket of soil, then hooked it in, and then slowly rose up... The engine also made a roar full of load, and the sound was full of power.

Although only an ordinary excavator was repaired, Peng Huading felt unparalleled in his heart. The most important thing was that through this repair, he had a specific understanding of the processing technology of engineering machinery on the current market.

Previously, Peng Huading's understanding of the processing technology in the market mainly comes from books and the Internet, and he is not so intuitive and in-depth. Mastering the current processing technology and level is of great help to his design of automatic production lines and processing gears.

With the great thanks from the Chai family, Peng Huading left the construction site and they completed the remaining installation work by themselves. He had to rush back to the city as soon as possible to go to work in the office.

He had already agreed to Wang Guosheng not to resign for the time being, and also promised his grandmother that he would work with peace of mind. He had to hold on for a few more days until the order from the French VOROU company arrived or when Wang Guosheng was captured by the relevant departments.

When he arrived at the office, it had been more than an hour since he worked. He was a little uneasy but found that he was worried too much and there was no one in charge of the office.

This chaos in the office is a beautiful thing for Peng Huading. He happened to use this time to do his own thing with confidence and boldness. He could use it to design automated production lines to prepare for the next step of expanding production. If a French company determines that the five gears are qualified, a large number of orders may come next. He has to expand the production scale. He can't handle it by hand alone. It is both tiring, dangerous and easy to leak secrets.

He thought about how to find business opportunities in construction machinery such as excavators. From the maintenance situation last night, it can be seen that the quality of the wear parts in the excavators is not very good. If he can produce wear-resistant parts, it will undoubtedly greatly improve the service life of the construction machinery, improve the competitiveness of the products, and benefit both users and manufacturers. They will definitely welcome them.

In other words, he can find business to improve the wear resistance of parts. His method of heat treatment of gears yesterday can be used for heat treatment of other parts with a slight change.

...

Peng Huading was able to accept the chaos in the office calmly, but others were unwilling to do so. After all, the employees of the office rely on Huakang Company to earn their salary, and no one wants it to be messed up.

The most depressing thing is naturally Wang Jilin and Huang Huaijiang, who are causing this chaotic situation, both of them fought to be the top leaders of the office, but they deviated from their expectations:

After learning about the conflict between Wang Jilin and Huang Huaijiang, the headquarters leader of the headquarters, who was taking into account the interests of the company, naturally would not be too biased to one of them. Although the company headquarters quickly made a decision to adjust the leadership team of Yuejiang Office, which was what Wang Jilin and Huang Huaijiang wanted, Wang Jilin did not wait for the appointment of the headquarters to promote him as the director of the office, but Huang Huaijiang was waiting for the notice that he would be transferred to Shaoan Office to continue to be the deputy director.

Both of them were in a bad mood, so they went to Nanshan City to find their backers to go for activities, and threw the office work aside.

Huang Huaijiang's efforts did not gain anything. The people at the headquarters told him that he had to go to work in a new position unconditionally, otherwise he would be fired. Wang Jilin was not much better, thinking that he could become the top leader by just one move, but the information he heard gave him a blow. Not only would he not become the top leader, but Peng Huading, whom he disliked, would also be promoted!

"Ah——!" Wang Jilin was stunned. "The headquarters decided to promote Peng Huading, who had just joined the company for a few days?"
Chapter completed!