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Comprehensive  Hydraulic Repair and Maintenance


At Hydraulic Service, Inc., we specialize in hydraulic equipment repairs for industries across Kelso, Longview, Astoria, and surrounding areas. With over 50 years of hands-on experience, our team has the knowledge, tools, and expertise to handle any hydraulic job—big or small. From logging equipment to heavy industrial machinery, we provide reliable repair services that keep your systems running smoothly and your operations on schedule.


Hydraulic systems are complex, and when they fail, downtime can be costly. That’s why we offer a full range of services designed to restore performance quickly and efficiently.

Our Hydraulic Services


We provide a wide variety of hydraulic repair and maintenance services to meet the needs of industries throughout Cowlitz County and beyond.

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Machine Shop

Our machine shop allows us to perform precision machining and custom repairs on hydraulic and pneumatic components. Whether you need parts fabricated, components rebuilt, or specialized machining for unique equipment, we have the tools and expertise to deliver.

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Welding Services

Hydraulic systems often require welding for repairs and fabrication. Our skilled welders provide professional welding services to restore strength and durability to your equipment.

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Hydraulic and Pneumatic Cylinder Repair

Cylinders are critical to hydraulic systems, and when they fail, performance suffers. We specialize in repairing and rebuilding hydraulic and pneumatic cylinders, restoring them to peak condition and extending their lifespan.

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Hydraulic Pump, Motor, and Valve Repair

Pumps, motors, and valves are the heart of hydraulic systems. Our technicians provide expert repair services for these components, ensuring your equipment operates efficiently and reliably.

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Fabrication Repair

For equipment, we offer fabrication repair services. Our team can design and build solutions tailored to your specific needs, helping you get the most out of your machinery.

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Accumulator Charging and Repair

We provide charging and repair services for accumulators up to 4,500 PSI. Proper accumulator maintenance is essential for system safety and performance, and our team ensures your equipment meets industry standards.

Why Choose Hydraulic Service, Inc.?


With more than four decades of experience, Hydraulic Service, Inc. has built a reputation for reliability, professionalism, and quality workmanship.

Reasons customers trust us:

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Proven Experience – 40+ years serving industries across Washington and Oregon.

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Comprehensive Capabilities – From machining to welding, we handle complex hydraulic repairs.

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Skilled Technicians – Experts who understand the demands of heavy machinery and industrial equipment.

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Local Convenience – Located in Kelso, WA, minutes off I-5 for easy access.

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Commitment to Quality – Every repair is performed with precision and care.

We’ve seen just about everything when it comes to hydraulic systems, and we know how to get the job done right.

Serving Industries Across the Region


Hydraulic Service, Inc. proudly serves businesses in Kelso, Longview, Astoria, and surrounding areas. Our customers include logging companies, construction firms, manufacturing plants, and other industries that rely on hydraulic systems to power their operations.


By keeping hydraulic equipment in peak condition, we help businesses reduce downtime, improve safety, and extend the lifespan of their machinery.

Have Any Questions?


If you don’t see the service you’re looking for, don’t hesitate to reach out. We offer a wide range of hydraulic solutions and are happy to discuss your specific needs.


Call (360) 425-3240 today to speak with our team at Hydraulic Service, Inc. in Kelso, WA.


We’ll answer your questions, provide expert guidance, and let you know how we can assist with your hydraulic repair project.

Get Started With Hydraulic Service, Inc.


For hydraulic equipment repairs in Kelso, Longview, Astoria, and surrounding areas, trust the experts at Hydraulic Service, Inc. With a full machine shop, welding capabilities, and decades of experience, we’re equipped to handle all your hydraulic needs.

Call (360) 425-3240 today to schedule your service and experience the difference of working with a trusted hydraulic repair shop.

Benefits of Choosing Our Hydraulic Repair Service


Choosing Hydraulic Service, Inc., means more than just fixing a broken part. Here are some key benefits of our hydraulic repair service designed to support your business:


Reduced Downtime: Fast on-site repairs get your equipment back in action quickly.

Cost Savings: Preventing major failures reduces expensive replacements and extended repairs.

Expert Technicians: Skilled professionals with years of experience handle your repairs with precision.

Proactive Maintenance: Scheduled maintenance options catch problems before they escalate.

Tailored Solutions: Repairs customized to your specific hydraulic system and industry needs.

Reliable Quality: Use of premium parts and advanced tools ensures long-lasting results.


These benefits translate into smoother operations, improved safety, and increased productivity for your business. For expert assistance and reliable solutions, trust Hydraulic Service, Inc. to handle your industrial hydraulic repair needs in Longview, WA. Contact us today to schedule a service and keep your equipment running at peak performance.

Hydraulic Repair Service FAQs in Longview, WA

  • How Do I Know If I Need Hydraulic Cylinder Repair in Longview, WA?

    You may need hydraulic cylinder repair if you notice signs such as oil leaks, reduced lifting power, unusual noises, slow or jerky cylinder movements, or visible damage to the cylinder body. Prompt attention is important because these issues can lead to inefficient operation or complete equipment failure if left unaddressed.



  • How Long Does Hydraulic Repair Typically Take?

    The duration of hydraulic repair depends on the complexity of the issue. Simple repairs like hose replacements might take a few hours, while more extensive repairs such as cylinder rebuilds or pump replacements could take one or more days. Local technicians in Longview, WA, prioritize timely service to reduce your downtime.

  • Can Damaged Hydraulic Cylinders Be Rebuilt Instead of Replaced?

    Yes, many damaged hydraulic cylinders can be rebuilt instead of fully replaced. Rebuilding involves replacing worn seals, rods, pistons, and other components to restore full functionality. Rebuilding is often more cost-effective and quicker than buying a new cylinder, especially when performed by experienced professionals in Longview, WA.

  • How Much Does Industrial Hydraulic Repair in Longview, WA, Cost?

    Industrial hydraulic repair costs vary based on the type of equipment and extent of damage. Minor fixes might cost a few hundred dollars, while significant repairs involving complex machinery can be higher. Getting an onsite evaluation from a trusted Longview, WA, hydraulic repair service will provide a more accurate cost estimate tailored to your needs.

  • How Often Should Hydraulic Equipment Be Inspected?

    Hydraulic equipment should be inspected regularly to avoid unexpected breakdowns. Many industry experts recommend at least quarterly inspections for most equipment, while some heavy-use machinery may require monthly checks. Routine inspections in Longview, WA, help identify wear and leaks early, ensuring reliable operation and reducing costly repairs. Contact Hydraulic Service, Inc. today to schedule your inspection and keep your hydraulic systems running smoothly.