Hitachi Crawler excavator Bucket cylinder assy ZX490 ZX490LCH-5A for hitachi excavator

Hitachi Crawler excavator Bucket cylinder assy ZX490 ZX490LCH-5A for hitachi excavator

List of spare parts

Buffer mechanism and energy management
Excavator hydraulic cylinders are usually equipped with buffering devices at the end of the stroke to prevent rigid collisions between the piston and the end cap. The buffering principle mainly involves gradually reducing the return oil passage area and increasing the return oil resistance through specially designed buffering structures (such as conical plungers or throttling holes) when the piston approaches the end of its stroke, thereby slowing down the piston's movement speed. This hydraulic buffering method is stable and reliable, without the need for additional energy input, and is a typical example of self-regulation in hydraulic systems.

In recent years, some high-end excavators have begun to adopt electromagnetic buffering technology, which uses electromagnetic coils on the cylinder head and piston to counteract the inertial impact of the piston with electromagnetic force. This active buffering method has fast response speed and flexible adjustment, and can adjust the buffering force in real time according to actual working conditions, achieving more accurate end control. Electromagnetic buffering represents a direction for the intelligent development of hydraulic cylinders, particularly suitable for precision excavation operations that require high precision in motion.

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.