17M-50-49290 17M5049290 SEAL FITS FOR KOMATSU D155A-5 D275A-5D

1. Repair Seal Kit Details

2. Parts on group:

3. 17M-50-49290 PICTURE:


4. SEAL PART NO. FOR KOMATSU :

5. FAQ
Q1. What are the characteristics of PU material?
A1. Polyurethane (PU) is a versatile polymer with a wide range of properties that make it suitable for various industrial and consumer applications. Below are its key characteristics:
(1). Mechanical Properties:
High Elasticity & Flexibility – PU can be formulated to be soft (like foam) or rigid (like plastic);
Excellent Abrasion Resistance – More durable than rubber in high-wear applications;
Good Tensile Strength – Resists tearing and deformation under stress;
Load-Bearing Capacity – Used in shock absorbers, wheels, and structural components.
(2) Chemical Resistance:
Resistant to Oils & Greases – Ideal for seals, gaskets, and hydraulic components;
Moderate Acid/Base Resistance – Handles weak acids/bases but degrades in strong chemicals;
Poor Solvent Resistance – Swells or dissolves in ketones, esters, and chlorinated solvents.

Q2. can you tell me the difference between dust seal PU materal and dust seal rubber material ?
A2. Here is a table to show you their differences of functional:

6. Exhibition & Warehous




Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More

Guangzhou OUB Machinery Equipment Co.,Ltd since its inception in 2004, has been engaged in hydraulic seals business of excavators, loaders, bulldozers,breaking hammers and other seals have in-depth study. Through more than 15 years of efforts, OUB has accumulated a large number of domestic, imported excavators and broken hammer seal data, and for new products and new models of seals data constantly updated, finishing and perfect. After more than 10 years of practical inspection, product quality is stable and reliable, has accumulated rich experience and good reputation, with long-term cooperation at home and abroad friends and customers, "take care of the equipment,improve the efficiency and honesty" concept won the customers at home and abroad highly recognized and widely praised.
In the future, we will continue to maintain a rigorous scientific attitude, to maintain a professional, precise style of work, and strive to become the best supplier of Chinese seal repair kits, look forward to your cooperation!