Product Description

Cheap Mini Crawler Excavators Small Digger Hydraulic Hot-Sell Mini Excavators Hydraulic Crawler 2.0ton  Excavators
EXCAVATOR SD20U
This 20U small excavator is an efficiency type model, the system is mature and stable, and the leather is resistant to construction. It is widely used in orchard nursery, landscaping, mountain reclamation, farmland reconstruction, indoor demolition and other operations.
 

Machine parameters		Dimensions
Model	SD20U	Overall Length	3400mm
Operating Weight	2 ton	Overall Width	1100-1300mm
Bucket Capacity	0.06m³	Overall Height	2200mm
Rated Power	10kw ,11.2kw,14.7 kW	Arm  Length	950mm
Max.Hydraulic System Pressure	18mpa	Boom  Length	1700mm
Max. Grade ability	30°	Track Length	1550mm
Max Walking Speed	2.8-4.1km/h	Track Width	230mm
Max  Digging Force	16kn	Platform Width	970mm
Platform Rotary Speed	14 r/min	Platform Ground Clearance	480mm
Boom swing function	yes	Bucket Width	450mm
Crawler stretch function	optional	Machine configure
Working range		Engine  Model	Yanmar, Perkins
Max. CZPT Height	3400mm	Main valve	Beifang / Husco
Max CZPT Depth	2050mm	Main Pump	Futai  (3 pumps system, gear pump )
Max. CZPT Radius	3600mm		Taifeng (Plunger pump)
Max Dumping Height	2400mm	Rotation Motor	Eaton

Radius of Tail Gyration	670mm	Walking Motor
Max. Sinking Depth of Bulldozer	195mm	The above pictures are for reference only. If there is any change, no further notice will be given.

1.New design of appearance
It’s made of die-formed covering parts by stamping, with beautiful appearance and high grade.
2.Design of reinforced boom,arm and bucket
Improve structure, disperse stress, improve stability and durability of structure
3.Tailless slewing & boom sway
Two major functions are provided at the same time, and barrier free construction is available in complex environment (wall root, pipeline, indoor, etc.)
4.Three pump hydraulic system
Four linkage can be realized to ensure the simultaneous operation of bucket, boom, arm and rotation, and the operation is fast and smooth
1.Boom sway
Help you to deal with complex environment (wall root, pipeline, indoor, etc.) and barrier free construction.
2.Reinforced rubber track durable
3.Matched with 14.7kw imported engine, powerful
The tailless excavator has the highest power efficiency, strong power, low noise and low fuel consumption, meeting the T3 emission standard
4.Can be matched with a variety of front-end furniture, suitable for a variety of different working conditions.l

1.How long is the mini excavator warranty time?
A: One year.

2.which certification of mini excavator do you have?
A:CE,ISO900 1,SGS,etc.expect these for different countries,other certificates required by customer is agreed.

3.Is it convenient to see visit your factory and how go there?
A:Welcome everyone to come to visit our factory,we are in HangZhou city,near with HangZhou airport.Also high speed train arrive at our city.Make sure your trip date we will arrange it for you.

4.What are our advantages compared with Manufacturer/Factories?
A:Competitive Price-we work as the leading dealers of various leading China
construction machinery,and are treated with best dealership prices everyyear.From numerous comparison and feedbacks from clients,our price is more competitive than Manufacturer/Factories.
Quick Response-Our team is consisted of a group of diligent and enterprising people,working 24/7 to response client inquires and question all the time.Most problems can be solved within 12 hours.

5.How long will our price be valid?
A:We are a tender and friendly supplier,never greedy on windfall profit.Basically,our price remains stable through the year.We only adjust our price based on 2 situations:
(1) The rate of USD: RMB varies significantly according to the international currency exchange rates.
(2) Manufacturers/Factories adjusted the machine price,because of the increasing labor cost,and raw material cost.

How to tell if your driveshaft needs replacing

What is the cause of the unbalanced drive shaft? Unstable U-joint? Your car may make clicking noises while driving. If you can hear it from both sides, it might be time to hand it over to the mechanic. If you’re not sure, read on to learn more. Fortunately, there are many ways to tell if your driveshaft needs replacing.

unbalanced

An unbalanced driveshaft can be the source of strange noises and vibrations in your vehicle. To fix this problem, you should contact a professional. You can try a number of things to fix it, including welding and adjusting the weight. The following are the most common methods. In addition to the methods above, you can use standardized weights to balance the driveshaft. These standardized weights are attached to the shaft by welders.
An unbalanced drive shaft typically produces lateral vibrations per revolution. This type of vibration is usually caused by a damaged shaft, missing counterweights, or a foreign object stuck on the drive shaft. On the other hand, torsional vibrations occur twice per revolution, and they are caused by shaft phase shifts. Finally, critical speed vibration occurs when the RPM of the drive shaft exceeds its rated capacity. If you suspect a driveshaft problem, check the following:
Manually adjusting the imbalance of a drive shaft is not the easiest task. To avoid the difficulty of manual balancing, you can choose to use standardized weights. These weights are fixed on the outer circumference of the drive shaft. The operator can manually position the weight on the shaft with special tools, or use a robot. However, manual balancers have many disadvantages.

unstable

When the angular velocity of the output shaft is not constant, it is unstable. The angular velocity of the output shaft is 0.004 at ph = 29.5 and 1.9 at t = 1.9. The angular velocity of the intermediate shaft is not a problem. But when it’s unstable, the torque applied to it is too much for the machine. It might be a good idea to check the tension on the shaft.
An unstable drive shaft can cause a lot of noise and mechanical vibration. It can lead to premature shaft fatigue failure. CZPT studies the effect of shaft vibration on the rotor bearing system. They investigated the effect of flex coupling misalignment on the vibration of the rotor bearing system. They assume that the vibrational response has 2 components: x and y. However, this approach has limited application in many situations.
Experimental results show that the presence of cracks in the output shaft may mask the unbalanced excitation characteristics. For example, the presence of superharmonic peaks on the spectrum is characteristic of cracks. The presence of cracks in the output shaft masks unbalanced excitation characteristics that cannot be detected in the transient response of the input shaft. Figure 8 shows that the frequency of the rotor increases at critical speed and decreases as the shaft passes the natural frequency.

Unreliable

If you’re having trouble driving your car, chances are you’ve run into an unreliable driveshaft. This type of drivetrain can cause the wheels to stick or not turn at all, and also limit the overall control of the car. Whatever the reason, these issues should be resolved as soon as possible. Here are some symptoms to look for when diagnosing a driveshaft fault. Let’s take a closer look.
The first symptom you may notice is an unreliable drive shaft. You may feel vibrations, or hear noises under the vehicle. Depending on the cause, it could be a broken joint or a broken shaft. The good news is that driveshaft repairs are generally relatively inexpensive and take less time than a complete drivetrain replacement. If you’re not sure what to do, CZPT has a guide to replacing the U-connector.
One of the most common signs of an unreliable driveshaft is clanging and vibration. These sounds can be caused by worn bushings, loose U-joints, or damaged center bearings. This can cause severe vibration and noise. You can also feel these vibrations through the steering wheel or the floor. An unreliable driveshaft is a symptom of a bigger problem.

Unreliable U-joints

A car with an unreliable U-joint on the drive shaft can be dangerous. A bad u-joint can prevent the vehicle from driving properly and may even cause you trouble. Unreliable u-joints are cheap to replace and you should try getting parts from quality manufacturers. Unreliable U-joints can cause the car to vibrate in the chassis or gear lever. This is a sure sign that your car has been neglected in maintenance.
Replacing a U-joint is not a complicated task, but it requires special tools and a lot of elbow grease. If you don’t have the right tools, or you’re unfamiliar with mechanical terminology, it’s best to seek the help of a mechanic. A professional mechanic will be able to accurately assess the problem and propose an appropriate solution. But if you don’t feel confident enough, you can replace your own U-connector by following a few simple steps.
To ensure the vehicle’s driveshaft is not damaged, check the U-joint for wear and lubrication. If the U-joint is worn, the metal parts are likely to rub against each other, causing wear. The sooner a problem is diagnosed, the faster it can be resolved. Also, the longer you wait, the more you lose on repairs.

damaged drive shaft

The driveshaft is the part of the vehicle that connects the wheels. If the driveshaft is damaged, the wheels may stop turning and the vehicle may slow down or stop moving completely. It bears the weight of the car itself as well as the load on the road. So even a slight bend or break in the drive shaft can have dire consequences. Even a piece of loose metal can become a lethal missile if dropped from a vehicle.
If you hear a screeching noise or growl from your vehicle when shifting gears, your driveshaft may be damaged. When this happens, damage to the u-joint and excessive slack in the drive shaft can result. These conditions can further damage the drivetrain, including the front half. You should replace the driveshaft as soon as you notice any symptoms. After replacing the driveshaft, you can start looking for signs of wear.
A knocking sound is a sign of damage to the drive shaft. If you hear this sound while driving, it may be due to worn couplings, damaged propshaft bearings, or damaged U-joints. In some cases, the knocking noise can even be caused by a damaged U-joint. When this happens, you may need to replace the entire driveshaft, requiring a new one.

Maintenance fees

The cost of repairing a driveshaft varies widely, depending on the type and cause of the problem. A new driveshaft costs between $300 and $1,300, including labor. Repairing a damaged driveshaft can cost anywhere from $200 to $300, depending on the time required and the type of parts required. Symptoms of a damaged driveshaft include unresponsiveness, vibration, chassis noise and a stationary car.
The first thing to consider when estimating the cost of repairing a driveshaft is the type of vehicle you have. Some vehicles have more than one, and the parts used to make them may not be compatible with other cars. Even if the same car has 2 driveshafts, the damaged ones will cost more. Fortunately, many auto repair shops offer free quotes to repair damaged driveshafts, but be aware that such work can be complicated and expensive.