Excavator parts E330C 191-5620 Arm cylinder assy for Crawler excavator

Excavator parts E330C 191-5620 Arm cylinder assy for Crawler excavator

The excavator track tensioning cylinder is a critical component in the undercarriage system of crawler excavators. It is designed to maintain optimal track tension, ensuring smooth operation and stability in various working conditions.

Excavator hydraulic cylinder is a precision mechanical hydraulic integrated device, and its internal structural design directly determines performance and reliability. A complete hydraulic cylinder is composed of multiple functional components working together, each with its specific function and design requirements. Understanding the structure and function of these components is crucial for the proper use and maintenance of excavator hydraulic systems.

Main structure of oil cylinder
The core framework of a hydraulic cylinder consists of a cylinder barrel, front and rear end caps, and piston rods. The cylinder barrel (also known as the cylinder body) is the main part of the oil cylinder, usually made of high-strength alloy steel seamless steel pipes. The inner wall is precision machined and hardened to ensure good sealing and wear resistance. One end of the cylinder barrel is usually connected to the rear end cover (cylinder bottom) by welding, while the other end is often connected to the front end cover (cylinder head) by threads or flanges. This structure ensures strength and is easy to maintain and disassemble. The piston rod is the output component of the oil cylinder, which is precision machined from a solid steel column and has undergone surface hardening treatment such as chrome plating to improve wear resistance and corrosion resistance. In excavator operations, the piston rod is frequently exposed to harsh environments, so its surface treatment quality directly affects the service life of the oil cylinder.

Piston and sealing system
The piston component is the power conversion core of the hydraulic cylinder, which converts hydraulic pressure into mechanical thrust. Pistons are usually made of high-strength materials and are precisely matched with the inner wall of the cylinder. The outer edge of the piston is equipped with multiple sealing rings, which not only prevent the two chambers of oil from flowing into each other (internal leakage), but also control the friction between the piston and the cylinder within a reasonable range. Modern excavator oil cylinders commonly adopt a combination sealing design, including primary seals (such as polyurethane U-rings), secondary seals, and guide rings. This multi-level sealing system can adapt to harsh working conditions such as high pressure, high temperature, and pollution.

The sealing system is the guarantee for the reliable operation of hydraulic cylinders. In addition to piston sealing, it also includes piston rod sealing (to prevent oil leakage), guide sleeve sealing, and dust sealing. The piston rod seal usually adopts a multi lip design, which can maintain good sealing performance and scrape off pollutants on the surface of the piston rod. The dust ring is installed on the outermost side, effectively blocking external dust, soil and other pollutants from entering the interior of the oil cylinder, which is particularly important for excavators that often operate in harsh environments. The material and structural design of seals directly affect the life and performance of oil cylinders. A high-quality sealing system can work reliably for a long time under high pressure (up to 35MPa or even higher), high temperature (-30 ℃ to+80 ℃), and pollution conditions.

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.