After these two days, Wang Erzhu has completely recognized Qin Zhenhua's brother, in the factory, there is a friend who can make friends and sincerely help him, it is too rare.

Qin Zhenhua glanced at Wang Erzhu and patted him on the shoulder: "It's hard work." ”

didn't say thank you, between good friends, there is no need to say thank you, Qin Zhenhua opened the aluminum lunch box, and smelled the familiar aroma of the big pot dishes inside, meatballs, pork belly, dangling on it.

I have been studying it just now, and I don't feel anything, but now that this meal is opened, I really feel hungry, Qin Zhenhua's mouth is facing the lunch box, and he is pulling it with chopsticks.

"Brother Zhenhua, can this machine be repaired?" Wang Erzhu looked at the rugged engine again, and asked Qin Zhenhua, Wang Erzhu entered the factory, naturally he also wanted to be an excellent worker, he was very interested in the machine, but no one taught him, he didn't know how to start, wipe the gun chamber or something, but he was perfect.

"It's hard to say." Qin Zhenhua had already stuffed all the rice into his stomach in just one minute, and let the stomach digest the rest, he returned to the side of the machine and began to continue to read the contents.

Wang Erzhu looked at Qin Zhenhua curiously, he could feel that Qin Zhenhua was different from ordinary people, just the actions of the past two days, Wang Erzhu was absolutely impressed, and the ordinary master repaired the engine, which was directly started, listening to the sound, watching the vibration, smelling the exhaust gas, and determining what was wrong.

As for Qin Zhenhua, he didn't have anything, but was studying a bunch of maintenance materials.

Actually, Liu Jianzhi is right, Qin Zhenhua is really on paper, he has seen countless maintenance materials, but he has never repaired it, after all, not just anyone here can come in and get started with maintenance.

Therefore, Qin Zhenhua simply started from what he was good at, and if he wanted to repair the tank, he not only had to use his hands, but also his brains.

If their repairs are correct, then the tank will already be able to reliably output power, so why scrap it? Eliminate these maintenance options, and then look for possible problems!

The maintenance plan is in order, the engine output power is not enough, first suspected of the fuel system, the injection pressure is not enough, the new fuel piston pump is replaced, and then, it is suspected that the cylinder is not tightly sealed, the new piston, piston ring, along with the carbon deposit or something has been removed, and then, the valve is not tightly sealed, grinding the valve... These maintenance plans must have been carried out in the renovation factory, but in the hands of the master here, I felt that the technology of the renovation factory was not up to par, and there was no technical cow of its own, so I did it all over again, and as a result, it was still impossible to meet the requirements, and the conventional maintenance could not be eliminated, so there was only one way left to scrap.

Even if it is a routine maintenance, all the possibilities of insufficient engine power have been walked through, but the cause of the problem has still not been found, and now, looking at the maintenance records page by page, until the end, Qin Zhenhua frowned.

Sure enough, all the methods have been used, even the most easily ignored, such as the blockage of the air intake system, etc., have been checked, and the masters here are the most experienced and will never make mistakes.

"Hey, are you still worried here?" At this moment, a voice came from his ears, after eating, Liu Jianzhi came back with his apprentices, Liu Dajun looked at Qin Zhenhua meditating here, and immediately came up to be sarcastic.

"Don't you know how to disassemble the engine?" Liu Dajun continued: "Look, you've been here for a few hours, and you don't even have a wrench, just like you, and you still brag about being a technical expert in the workshop?" Apprentices, you must have the consciousness of apprentices, learn more from Master Liu! ”

Just behind, Liu Jianzhi leaned against a 59 tank under repair, with a satisfied look on his face, hum, you just know how to repair a 69 tank, that's also a blind cat encountering a dead mouse, what else will you do? Give you an engine, you don't dare to dismantle it.

"Dajun, you take a wrench, tell Zhenhua about it, see how this engine is dismantled, he has just come to the apprenticeship for three or four days, he can't do anything, you show him first, don't move too fast, let him see clearly, if he encounters the right tooth or something, he has to be taught." You take it apart first, and after you disassemble it, let Zhenhua pretend to see it. ”

No smoking was allowed in the workshop, so Liu Jianzhi continued to hold his canned and bottled cups, and said in a leisurely manner while drinking tea.

Qin Zhenhua, what did you do, don't think I don't know, hmph, I'll let Liu Dajun quickly disassemble this engine, and then, hmph, and then I'll leave it to you, install it slowly, wait until you can't install it, see how embarrassed you are, you are bragging.

"Okay." Liu Dajun has been here for more than half a year, although it may be a little laborious to install the engine, but to say that it is very easy to disassemble it.

Now, pick up the wrench, he began to disassemble the cylinder head, almost any engine, is disassembled from the cylinder head, as long as the cylinder head is disassembled, Qin Zhenhua will definitely not assemble, disassemble casually, but when assembling, the screws must be screwed diagonally, and a special torque wrench can be used.

"Wait!" Qin Zhenhua shouted: "Don't dismantle!" ”

Don't dismantle? Are you going to throw in the towel? Liu Dajun took the wrench, put it on his hand and turned it twice, and said, "If you don't dismantle it, how can you repair it?" Tell me about it! You're afraid you won't be able to pretend yourself! Ha ha. ”

After saying that, the other apprentices laughed along.

"This engine can be repaired without dismantling it at all!" Qin Zhenhua suddenly stared at a certain part of the engine as if he had discovered a new continent, looked at it seriously, and his voice was a little excited.

Everything that can be replaced has been changed, except for the cylinder block, everything else is almost brand new, and the result is still not up to the predetermined power, what does it mean?

It was originally a small problem, but it complicated it!

"Erzhuzi, brush the lunch box." Qin Zhenhua's eyes glanced to the side again, and saw that the lunch box was still there, and there were still some residues, so he said to Wang Erzhu.

Wang Erzhu hesitated for a moment, but looking at the direction of Qin Zhenhua's finger, he immediately understood, and walked outside with the lunch box in his hand.

"Can it be repaired without dismantling? If you're afraid that you won't be able to disassemble it, then learn it honestly. Liu Dajun continued to taunt Qin Zhenhua, but Qin Zhenhua didn't answer his words, ran quickly to the tool cabinet, and came over with a sealant.

"What are you going to do? Do you know how this works? Hey, hey! Liu Dajun's shouting became more and more urgent, watching Qin Zhenhua put the sealant along the partial cover of the crankcase, and then said: "It's repaired, try it on the bench!" ”