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Hitachi Excavator Repair

Hydraulically controlled mechanical regulator for Hitachi excavators EX-2, EX-3

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Thanks to the love of users, since the sales of the Hitachi excavator EX200-2 since August 1990, about 15,000 units have been sold until April 1994; the EX200-3 model has been on sale since October 1993, and has been sold around December 1995. Released 10,000 units. More than 25,000 excavators are sold around the world. 近年来,通过各种途径进入中国内陆的EX-EX-3挖掘机也为数不少。 Excavator maintenance In recent years, there are also many EX-EX-3 excavators that have entered China's inland through various channels. After many years of use of these hydraulic excavators, especially in recent years, more and more users are troubled by electrical faults on the excavator: one has a high frequency of electrical failures, and the other is the high cost of repairing electrical failures. Easy to judge. Now we can tell you with confidence that the above problems can be completely solved! After research, Hitachi Construction Machinery has developed a hydraulically controlled mechanical regulator for EX-EX-3, which completely replaces the vulnerable electrical components around the hydraulic pump: high-speed solenoid valves, angle sensors and wiring harnesses outside the cab.
What is even more amazing is that the machine can work without PVC (pump, valve control computer board)! 如果您拥有EX200-EX200-3甚至EX100-EX100-3还有EX220-EX220-EX120-EX120-3等8种机型的一种或几种,如果需要,请您使用液控机械式调节器的优越性。 Excavator repair If you have one or more of 8 types including EX200-EX200-3 or even EX100-EX100-3 and EX220-EX220-EX120-EX120-3, if necessary, please use the hydraulic control mechanical type The superiority of the regulator. Let us feel the superiority of this product by introducing a few examples! The engine often shut down the engine due to the failure of the high-speed solenoid valve. Others were normal. The machine works normally, and the customer is satisfied with the operating performance of the modified machine. In the EX-EX-3 machine failure, the high-speed solenoid valve failure ratio is higher. Although the troubleshooting is relatively simple, the maintenance cost is higher and the failure rate is higher. 4. The initial condition of the machine: the engine load is large, the water temperature is high, the machine is often stopped for a while. The engine load is lighter and noise is reduced.
The water temperature has dropped by about 10 degrees and has returned to normal. Increase the working speed by more than 10%. Due to climate and other reasons, some users in the southern region reported that the EX-EX-3 water temperature is high. After the mechanical regulator was modified, the problem was effectively solved by reducing the engine load. 4. Initial condition of the machine: The electrical components of the machine are often damaged (especially high-speed solenoid valves). 5. Effect after modification: Increased digging force, increased slewing speed, and improved engine water temperature. The modification not only solves the problem of electrical failure, but also improves the performance of the machine! Such examples are countless. Whether it is abroad or domestic, this set of devices has been well received by users. Since the promotion in China in early 2002, nearly 600 users have enjoyed the benefits brought by the technology update. Of course, we are most pleased that this device can really benefit users. 1. Design idea: Replace the easily damaged electrical components around the main pump. Reduce the failure rate (refitted machines, the failure rate is almost zero); 2. Design benefits: reduce user costs and extend the life of the machine.
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