Replacement Hydraulic Boom Cylinder for Kubota Excavator KX121-3 KX121-3ST KX121-3S OEM

Replacement Hydraulic Boom Cylinder for Kubota Excavator KX121-3 KX121-3ST KX121-3S OEM

Designed to replace OEM RD-118-67402, this boom cylinder fits Kubota KX121-3, KX121-3S, and KX121-3ST models. Engineered to OEM standards, it delivers reliable performance and durability for tough jobsite demands.

Specification

Why Trust Us?

We understand that choosing the right supplier online isn’t easy. That’s why we focus on what matters most:

1. Over 16 Years of Industry Experience
We've been manufacturing excavator hydraulic parts since 2008. Our expertise means less risk for you.

2. In-House Production, Full Control
From raw material to finished product — all under one roof. Quality is traceable and consistent.

3. Exported to 100+ Countries
Trusted by global customers in construction, mining, and agriculture industries.

4. Verified Quality Standards
ISO 9001:2015 certified. We test every cylinder before delivery.

5. Real Support, Real People
Our sales and technical team are ready to guide you — from selection to installation.

Guangzhou Guoli Engineering Machinery Co., Ltd., located in GuangZhou city, benefits from a large construction machinery parts market and convenient transportation access. Our company specializes in producing a range of excavator hydraulic cylinders, including excavator arm cylinders, boom cylinders, bucket cylinders, cylinder tubes, and cylinder rods. With 10+ years expertise, we've established a complete production line from R&D to manufacturing, offering OEM customization and precise part number systems with technical specifications/photos/pricing. We pride ourselves on using premium materials such as high-strength steel and advanced processing technologies to ensure durability and performance.

In addition to hydraulic cylinders, we also provide a comprehensive range of other hydraulic components. This includes hydraulic pumps, swing motor, control valve,travel motors,engine parts,and undercarriage components, all designed for use in various excavator models. Our extensive product portfolio reflects our commitment to delivering complete solutions for construction machinery, ensuring that all critical components are available to meet the needs of our customers.

We serve a global customer base, including clients from Thailand, the Philippines, Indonesia, Malaysia, the United States, Turkey, Russia, Mexico, and many other countries. Our products have been recognized and recommended by local dealers and are highly regarded for their quality and reliability. With our competitive prices, timely delivery, and outstanding customer service, we are committed to providing the best solutions for each client. We warmly welcome inquiries from businesses worldwide and look forward to establishing long-lasting partnerships.