Excavator parts E345D E349 274-2458 Bucket cylinder assy for Crawler excavator

Excavator parts E345D E349 274-2458 Bucket cylinder assy for Crawler excavator

Overview and Basic Working Principle of Hydraulic Cylinder

Hydraulic cylinders are the core executing components in hydraulic systems that convert hydraulic energy into mechanical energy, playing a crucial role in construction machinery such as excavators. As a linear motion driving device, hydraulic cylinders achieve precise motion control of various working components of excavators through the extension and retraction of piston rods, such as boom lifting, boom extension and retraction, and bucket flipping. Compared with traditional mechanical transmission, hydraulic transmission has significant advantages such as high power density, flexible layout, and convenient speed regulation, which makes hydraulic cylinders an indispensable power transmission component for modern excavators.

The working principle of hydraulic cylinders is based on Pascal's principle (static pressure transmission principle), which means that in a closed container, the pressure applied to a stationary liquid will be transmitted to all points of the liquid at the same time with equal value. When the hydraulic pump delivers high-pressure oil to a certain chamber of the cylinder through the control valve, the oil pressure acts on the effective area of the piston to generate thrust, pushing the piston rod to make linear motion. At the same time, the oil in the other chamber is discharged back to the oil tank. By changing the direction and flow rate of the oil, the movement direction and speed of the piston rod can be precisely controlled, thereby achieving precise execution of various complex movements of the excavator.

List of spare parts

FAQ:

1. If I only know the excavator model, but can not offer parts No., what should I do ?
If possible, you can send us pictures of old products, nameplate or the size for reference.
2. What is the warranty of the parts after I purchased?
The warranty is 6/12 Months based on the item details.
3. How can I pay the order?
We can receive payment through T/T, Paypal(for small amount),Alibaba trade assurance.
4. When will get the items after I place order?
Once your payment is confirmed, we will arrange the goods within 24 hours; if not in stock , we will inform you before placing the order.
5. How can I do if there is something wrong with the items?
First of all , I have confidence in the quality of our products ,if you really found something wrong ,pls provide pictures for us and we will check. After it is confirmed, pls return to us , we will offer the correct item.
6. What is your main products ?
We are specialized in the excavator spare parts, such as travel motor gearbox/ass’y/parts, swing gearbox/ass’y/motor/parts, hydraulic pump assy/parts and gear parts. If you need other excavator parts, we also can supply as your requirements.