2012-02-04
In the second-hand excavator market, the 70 type used small excavator is second only to the 60 type. According to statistics, the best-selling second-hand 70 type excavator currently isHitachi ZX70andDoosan DH70
Hitachi ZX70 Mini Excavator
ZX70 is a Hitachi ZX series 7-ton excavator with a working weight of 6510kg and a bucket capacity of 0.3 cubic meters.
The machine has been reinforced structurally and its durability has been increased. The base part of the boom adopts a pin shaft with a stop device. The bottom plate, side plate, and welded parts with the reinforcing plate of the bucket are all protected by wear-resistant plates, which improves the durability of the welded parts. Flat bottom is not easy to scratch the road surface. When leveling, the road surface should be leveled and leveled. By using an automatic 2-speed motor, the walking force and speed have been improved.
The ZX70 is equipped with an Isuzu CC-4JG1 engine with a rated power of 40.5 kWh. According to Jia You, the biggest advantage of this car is low fuel consumption, efficient and fast operation, and good coordination; The design of the cab embodies the characteristics of humanization.
Doosan DH70 Mini Excavator
DH70 excavator is a product launched by Doosan in April 2009, which combines the Bobcat style of operation with the cost-effective Doosan excavator. The working weight of the whole machine is 6980kg, and the bucket capacity is 0.28m?.
The engine is Kubota's V3300DI, with a power of 61.4HP and a power of 45.8KW/2200RPM. It adopts a forced circulation cooling pump three heat mode, characterized by high durability, high reliability, low vibration, and low noise. The engine displacement is 3.318L, with considerable horsepower. The diesel and hydraulic oil ports are built in, and the chassis is lubricated with grease, which imitates the layout of Japanese excavators.
The hydraulic system is a closed load sensing system with pressure compensation, independent pressure and flow distribution, and can be operated freely. A single high flow pump can be controlled with constant power. Efficient hydraulic oil cooling system. ORFS sealed leak proof connection.
The strong digging power comes from a 61.4 horsepower engine; The strong excavation force of 5.3 tons ensures the performance of the excavator. In addition, the control lever installed on the right-hand side of the cab makes speed control more convenient.
The machine is equipped with a cross type bulldozer, providing a comfortable working environment. It uses Bobcat's advanced monitoring system, and the driver's cabin is equipped with MP3 and FM/AM radios, as well as a heating and cooling air conditioning system. It can quickly (within 15 minutes) reduce the temperature from high temperature (40 degrees) to 25 degrees; Natural circulation wind. TOPS certification makes the cab safer.
User reviews
Comparison between Hitachi ZX70 and Doosan DH70
The user bought the Hitachi ZX70 in November 2009 and commented that the speed of the car is a bit slow, and the most important thing is that there is no bulldozer blade. Later, I purchased another Doosan DH70 with a bulldozer shovel.
Fuel consumption issue: The Hitachi ZX70 is generally stable at around 35, while the Doosan DH70 is between 35-40. The Doosan DH70 has significantly greater strength than the Hitachi ZX70, and its speed is also faster. Whether digging hard or soft soil, the Doosan DH70 is pulled up in one bucket, with sufficient strength.
Advantages and disadvantages of Hitachi ZX70 and Doosan DH70:
Hitachi 70
1. The Hitachi ZX70 has a large clearance on the turntable, and when rotating to stop, it always needs to swing left and right a few times before stopping. However, the Doosan DH70 does not have this phenomenon and can stop rotating at any time.
2. The walking pedal of Hitachi ZX70 is relatively heavy and difficult to control, making it easy to step lightly or heavily.
3. Bucket, the two buckets have similar capacities. The narrow rock bucket used by Hitachi ZX70 is good for digging hard soil, but it has some soft soil properties, and the soil always cannot shake off. The Doosan DH70 uses a wide earthmoving bucket, which makes it easy for the soil to shake off.
4. The composite action of the Hitachi ZX70 is faster than that of the Doosan DH70, and the single speed of the Doosan DH70 is faster than that of the Hitachi ZX70. The movements of the Hitachi ZX70 are uniform, and the overall stability of the vehicle is better than that of the Doosan DH70.
5. Engine: The Hitachi ZX70 is an Isuzu engine that is fuel-efficient and lacks power, but has a low noise level that makes it comfortable to listen to. The Doosan DH70 uses Kubota's engine, which has a loud noise but also high horsepower.
6. In terms of overall appearance, the Doosan DH70 feels more coordinated, while the Hitachi ZX70 appears larger when viewed from the top but smaller when walked, which may not be very coordinated. However, overall, the Hitachi ZX70 appears larger.
7. The interior of the Hitachi ZX70 is more user-friendly and looks more upscale.
Dose 70
The Hitachi ZX70 has been used for over 3000 hours without any issues, including minor problems. The Doosan DH70 has been used for 500 hours without any major issues, but there are some minor problems that have been resolved by personal effort.
The Hitachi ZX70 was purchased for the full amount of 465000 yuan. I received 5000 accessories and 2000 fuel cards as a gift, while Doosan DH70 purchased the full 403000 yuan with 5000 accessories and no fuel cards.
10. Finally, summarize the overall cost-effectiveness of Hitachi ZX70 and Doosan DH70. The Hitachi ZX70 retains its value, is not easily damaged, has high configuration, and is user-friendly, but its price is high, so it will not be handled well in the future. Doosan's machine is truly the most cost-effective machine. The price is suitable for ordinary consumers, and the machine is also decent. In terms of configuration, we also use branded products, but there is no Japanese car for resale value and no Japanese car for practical work.
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