What are the improvements after the upgrade of the old EX series and the current ZX series of Hitachi excavators

　　Hitachi excavator manufacturer excavator models are mainly divided into two generations. The old EX series has been eliminated. Although there are very few equipments in operation, the excavators are old and the internal wear of the mechanical equipment is heavy. Especially for problems such as exhaust emissions, there are not many EX series that can work normally. The first generation of ZX was launched by Hitachi in 2002. which is more than 20 years old. Although some of the first generation models are still working. But the number is not large.

　　After many upgrades, the Hitachi ZX series has a very big upgrade in power configuration and power selection. In addition to improving fuel consumption performance, driving comfort and driving safety have been greatly improved. In order to meet the requirements of international equipment for environmental protection emissions of construction machinery, the environmental protection of Hitachi ZX series new excavators now meets the environmental protection emission requirements of various countries (each country has different requirements for environmental protection emissions, and different types of excavator models can be selected).Tiedou

　　Features and evolution of EX series excavators

　　Early EX series (such as EX200-1. EX200-2):

　　Engine: often use Hitachi's own brand or Isuzu engine, the power is usually between 100 and 140 horsepower.

　　Hydraulic system: basic variable displacement hydraulic pump, working pressure is about 30 MPa.

　　Cab and control: basic operating environment design, with basic air conditioning and seats in the cab.

　　Late EX series (such as EX200-3. EX200-5):

　　Engine: upgraded to more powerful engines, such as Isuzu 6BG1T or 6HK1T, power increased to between 130 and 160 horsepower.

　　Hydraulic system: increased to a higher working pressure (about 34 to 36 MPa), improving work efficiency and power output.

　　ZX series excavator performance upgrade and configuration changes

　　Early ZX series (such as ZX200-3. ZX200-5):

　　Engine: Inherited the engine genes of the EX series, but usually optimized and adjusted to improve fuel economy and emission performance.

　　Hydraulic system: Introduced more advanced hydraulic control technology, such as further optimization of variable displacement hydraulic pumps, improved system response speed and accuracy.

　　Cockpit and control: Updated cockpit design, providing more advanced operating control and higher operating comfort, including a more modern human-machine interface and a more intelligent operating system.

　　Modern ZX series (such as ZX200-6 and above):

　　Engine: Used more efficient engines, such as Hitachi 4HK1X, the power is further improved, and some models even reach more than 160 horsepower.

　　For the EX series used excavators, although there are also, and the price is very cheap. If the budget is not too low, TD is still not recommended for users to choose. The first and second generations of the ZX series are cheap, and the performance can also be found to be very reliable. The new series of excavators are slightly more expensive and are more suitable for users who pursue quality and performance. Although the market price of the new used excavators is slightly higher, it still has a price discount of nearly 50% compared to new machines.