Kubota Excavator U50-3 U50-4 U50-5S Arm Seal Kit Hydraulic Cylinder Oil Seal

Product Specification

Kubota Excavator U50 Arm Seal Kit Hydraulic Cylinder Oil Seal Repair Kit Heavy Duty Machine Parts

Product Description

Product Details 

Product Introduction

1. Product Type Excavator seals can be divided into the following categories according to their use and installation location. Piston seals are used for hydraulic cylinder pistons to prevent hydraulic oil from leaking from the high-pressure side to the low-pressure side. Rod seals are installed on the hydraulic cylinder rod to prevent hydraulic oil leakage and contaminants from entering. Dust seals are located outside the hydraulic cylinder to prevent dust, dirt and other contaminants from entering the system. O-rings are used for static or dynamic sealing and are often used in connection parts. Rotary seals are used for rotating parts, such as shaft seals of hydraulic motors or pumps. Guide rings are used to support pistons or piston rods to reduce friction and wear.

2. Material properties The materials of seals need to have characteristics such as wear resistance, high temperature resistance, and corrosion resistance. Commonly used materials include: Nitrile rubber (NBR) has good oil resistance and is suitable for general hydraulic systems. Fluororubber (FKM) has excellent high temperature resistance and chemical corrosion resistance and is suitable for harsh environments. Polyurethane (PU) has excellent wear resistance and is often used in high-pressure environments. Polytetrafluoroethylene (PTFE) has a low friction coefficient and chemical corrosion resistance and is suitable for high-speed rotary seals. Silicone rubber (VMQ) has good high temperature resistance and is suitable for high temperature environments.

3. Application Scenarios Excavator seals are widely used in the following scenarios Hydraulic cylinder seals are used for hydraulic cylinders such as booms, dipper rods, and buckets of excavators. Hydraulic pump and motor seals are used to seal the rotating shafts of hydraulic pumps and hydraulic motors. Pipeline connection seals are used for joints and connection parts of hydraulic pipelines. Dust protection is used on the outside of hydraulic cylinder rods to prevent dust and dirt from entering.

4. Maintenance and replacement Regular inspection Check whether the seals are worn, cracked, or aged. Clean environment When replacing seals, ensure that the working environment is clean to prevent contaminants from entering the system. Pay attention to the direction and position of the seals during installation to avoid distortion or damage.

Company Description
Our ZHIPAN oil seal Company supplies various brands and models of excavators supporting ARM, BOOM and BUCKET seal kits, crushing hammer, hydraulic pump, walking motor, rotary motor, center joint, rotary joint, joystick, expansion sealing kit.

Products available for

VOLVO, CATERPILLAR, KOMATSU, HITACHI, KATO, SUMITOMO, KOBELCO, DAEWOO/DOOSAN, HYUNDAI, CASE ,JCB, KUBOTA , SANY, Longgong,LIUGONG,XCMG, ZOOMLION and other imported or joint venture excavators

Material : phenolic fabric, PU, NBR, FKM, PTFE, POM ect

Components: cylinder seal kits typically include a variety of seals such as rod seals, piston seals, wiper seals, and O-rings.
Applications: These kits are tailored for hydraulic cylinders, providing a comprehensive set of seals to ensure optimal performance and longevity.
 

Specifications:

1. Seals you see in the picture is made in China, and the quality can be promised

2. Safe &carefully. Standard export carton package and sending port is up to your need and requirement, To send the goods as soon as we can to save you time .

3. Our hydraulic cylinder seal kits which are suit to Excavator for Komatsu, Kobelco,Hitachi, Sumitomo, Kato, Daewoo, Hyundai, Volvo,caterpillar.

Packing 

Porduct Display 

Factory Environment

Specifications:

1. Seals you see in the picture is made in China, and the quality can be promised

2. Safe &carefully. Standard export carton package and sending port is up to your need and requirement, To send the goods as soon as we can to save you time .

3. Our hydraulic cylinder seal kits which are suit to Excavator for Komatsu, Kobelco,Hitachi, Sumitomo, Kato, Daewoo, Hyundai, Volvo,.

Used in the following applications:

Why choose ZHIPANSEAL seal kit

1.Experience. We have been selling in the aftermarket for nearly 18 years, we know more about what kind of seal kits the machine needs under bad work conditions.

2.The accuracy of the dimensions.The same part number as the OEM, easy to query and purchase.

3.Price. We can beat all OEM parts in value,while as stated above the qulity of the parts will remain the same.

4.Lead Times. ZHIPANSEAL products have been exported for more than 17 years, and our extensive export experience can help you solve various transportation problems. We can ensure fast and efficient lead times across all ZHIPANSEAL Parts.

What is a Seal Kit?
A seal kit is a set of sealing components used to repair or maintain hydraulic or pneumatic cylinders in machinery. It typically includes various types of seals such as:

✅ Rod seals – prevent fluid leakage from the cylinder
✅ Piston seals – maintain pressure within the cylinder
✅ Dust seals / wipers – keep dirt and contaminants out
✅ Wear rings / guide rings – prevent metal-to-metal contact
✅ O-rings & backup rings – ensure tight sealing and support

Purpose of a Seal Kit:
1. Seal kits are essential to:

2. Restore the hydraulic or pneumatic cylinder’s performance

3. Prevent oil leakage

4. Maintain system pressure

5. Extend equipment lifespan

6. Reduce downtime and maintenance costs