SKU: YNF12208

Part number: 215-9990 525-3511 2159990 5253511

Product name: Stick Ram Seals Hydraulic Cylinder Seal Kit

Excavator Brand: erpillar

Stick Ram Seals Hydraulic Cylinder Seal Kit 215-9990 525-3511 2159990 5253511 Fits for erpillar

What is an oil seal?

The meaning of oil seal is: oil seal is a mechanical component used to seal oil (oil is the most common liquid substance in the transmission system, and also generally refers to the general liquid substance), which isolates the parts that need to be lubried in the transmission parts from the output parts, Do not allow the oil to leak.

Its functions are as follows:

1. Prevent oil from leaking through the rubber oil seal cover and oil seal washer;

2. Restore the elasticity of the rubber oil seal and protect the elasticity of the oil seal and O-ring.

3. Prevent oil from being sucked into the combustion chamber, and prevent and reduce smoke exhaust.

4. Reduce engine noise and improve engine compression ratio.

5. Extend the service life of the engine and prevent expensive maintenance costs.

6. Effectively suppress the oil leakage of the steering gear.

FAQ:

- What is your core activity (do you deal with engine replacement parts, fuel system, undercarriage, etc)?

We mainly do the couplings, seal kits, hydraulic parts, solenoids, electric parts, gear parts, bearings, and other excavator spare parts.

- Which kind of machinery do you work with (bulldozers, front loaders, graders, excavators, etc)?

We mainly do the spare parts for excavators. But sometimes to meet customers' requirements, we will do the sourcing for the customers for their needs for loader parts, air compressor parts, and so on.

- Which brands of machinery do you work with?

We supply parts for brands like Hitachi, erpillar, Komatsu, Sumitomo, Hyundai, Kobelco, Liebherr, JCB, etc.

We mainly do small to medium size excavators.

- Do you have the stock?

Most of our products are in stock.

Your Trusted Excavator Parts Supplier – Manufacturer & One-Stop Sourcing Solution

Looking for a reliable supplier of excavator parts? Whether you need OEM services or a complete range of parts, we provide the best solutions for your business. As both a manufacturer and trading company, we combine factory-direct prices with the convenience of one-stop sourcing, ensuring that you get high-quality parts at competitive prices.

At YNF Machinery, we specialize in excavator rubber parts and a wide range of excavator components. Our extensive experience and commitment to quality make us a trusted partner for distributors, wholesalers, and repair shops worldwide.

Why Choose YNF Machinery?

We are not just another supplier—we are your long-term partner for excavator parts. Here’s why businesses worldwide choose us:

✅ Largest Excavator Rubber Parts Factory in Southern China

Our factory is the biggest excavator rubber parts manufacturer in southern China. This means:
✔ Lower production costs, allowing you to increase your profit margins
✔ Reliable and stable supply, ensuring you get the parts you need, when you need them
✔ Consistent quality control, reducing the risk of defective products

✅ Thousands of Products & Multiple Quality Levels

We offer a comprehensive range of excavator parts, covering various brands and models.
✔ Choose from thousands of product lines
✔ Select from different quality levels to suit your market demands
✔ Always find the right part, reducing time spent searching for suppliers

✅ Expanding Global Network – 16+ Agents in China & Growing

We have over 16 agents across China and are actively expanding our global presence.
✔ Looking for distributors and agents worldwide—let’s grow together!
✔ Support with marketing, logistics, and product knowledge
✔ Long-term partnership opportunities with exclusive benefits

✅ 30+ Years of Industry Expertise

With decades of experience, we understand the excavator parts market inside out.
✔ Established reputation for reliability and professionalism
✔ Knowledgeable team to help you find the right parts quickly
✔ Expertise in OEM manufacturing, making custom parts to your specifications

✅ OEM Services & Customization

Looking to develop your own brand or need custom parts? We’ve got you covered!
✔ Our own factory can manufacture parts based on your designs and specifications
✔ We provide custom branding options to help you build your business
✔ From rubber parts to metal components, we can customize everything you need

✅ Office & Showroom in Guangzhou – Convenient Logistics

Our Guangzhou office and showroom allow for easy business meetings and fast shipping.
✔ View and inspect products before ordering
✔ Quick access to major ports for efficient global shipping
✔ Dedicated customer support team to assist with orders and inquiries

What Excavator Parts Do We Offer?

We cover all major excavator brands, including Caterpillar, Komatsu, Hitachi, Volvo, Kobelco, Doosan, Hyundai, JCB, Kubota, and more. Our product range is designed to keep your machines running efficiently and reduce downtime.