RPM’s Hydro Mounts combine a hydraulic viscous damper and rubber element within a single unit to deliver superior vibration control performance. This innovative design provides exceptional vibration absorption while maintaining the reliability and durability your equipment demands.
Hydro Mounts excel in demanding applications including vehicle cabs, agricultural machinery, variable speed engines, off-highway equipment, and construction and earthmoving machinery. In these challenging environments, our Hydro Mounts absorb transit shock and dramatically improve operator comfort. The failsafe design features interlocking metal components, making them ideal for mobile applications where reliability is critical.
How Hydro Mounts Work
Our Hydro Mounts provide optimal isolation at normal operating speeds while controlling excessive movement during low-speed operation. The engineered rubber element works in conjunction with the viscous pot and plunger system to deliver excellent vibration absorption. The damping effect of the hydraulic fluid activates only when needed – during shock forces, resonance conditions, or when equipment becomes unbalanced.
This intelligent design means you get smooth operation during normal conditions and enhanced control when your equipment faces challenging situations. The viscous damper effectively controls high-amplitude vibrations, extending machinery lifespan, reducing wear and tear, and improving overall working efficiency.
Don’t see your specific application listed? We’re here to help. Our team brings extensive knowledge of vibration control solutions and can guide you to the precise hydro mount for your needs. Contact us at 888-842-5668 or [email protected] to discuss your requirements.
| Key Advantages | Applications |
| Superior Vibration Control: Up to 95% vibration reduction for dramatically improved performance | Cab Mounting Systems: Operator cabs for construction, agricultural, and mining equipment |
| Enhanced Operator Comfort: Significant reduction in cab vibrations creates a more comfortable working environment | Engine Mounting: Variable speed engines, generator sets, and pump applications |
| Mobile Application Ready: Failsafe design with interlocking metal components ensures reliability in demanding mobile applications | Off-Highway Vehicles: Construction equipment, mining machinery, and specialized industrial vehicles |
| Transit Shock Absorption: Effectively absorbs shock loads during equipment transport and operation | Agricultural Equipment: Tractors, combines, and other farm machinery requiring vibration isolation |
| ROPS & FOPS Compatible: Suitable for rollover and falling object protection systems (subject to engineering approval) | Construction & Earthmoving: Excavators, dozers, graders, and compaction equipment |
| Extended Equipment Life: Reduced vibration transmission protects sensitive components and extends service intervals | Industrial Machinery: Any application requiring superior vibration control and shock absorption |
Industries We Serve
We provide reliable rubber components for critical applications across various industries, meeting the highest standards of performance and durability.
Engineering Excellence
Our hydro mounts are precision-engineered using advanced finite element analysis to optimize performance characteristics. The rubber compounds are specially formulated to provide the ideal balance between comfort (low stiffness) and control (movement limitation). Computer modeling ensures optimal stress distribution throughout the mount, preventing premature failure points.
The steel components undergo rigorous testing to ensure they meet or exceed safety requirements for mobile applications. Our rubber-to-metal bonding processes create permanent, reliable connections that maintain integrity throughout the mount’s service life.
Standard Hydro Mounts

Hydro Mounts
54 ProductsInstallation and Safety Features
The single-bolt installation design simplifies mounting procedures while ensuring secure attachment. Color-coded or marked components help ensure proper orientation during installation. The failsafe design means that even if the rubber element experiences damage, the mechanical components continue to provide essential operator protection.
Optional overload and rebound washers can be added to any configuration to provide additional safety margins. These components are engineered to engage only during extreme conditions, maintaining normal comfort levels during typical operation.
Why Choose RPM Hydro Mounts
With over 50 years of experience in rubber and elastomeric solutions, RPM understands the demanding requirements of heavy-duty applications. Our Hydro Mounts are manufactured to exacting standards, ensuring consistent performance and long service life. We work as your partner to identify the right mounting solution for your specific application, providing the technical expertise and support you need to succeed.
Hydro Mounts – Frequently Asked Questions

Find quick answers to your questions here or contact us directly for any additional inquiries.
What are hydro mounts and how do they differ from standard rubber mounts?
Hydro mounts are advanced vibration isolation devices that combine a hydraulic viscous damper with a rubber element in a single unit. Unlike standard rubber mounts, they provide variable damping – offering excellent isolation during normal operation while automatically increasing damping during shock loads or resonance conditions. This dual-action design delivers superior performance across a wider range of operating conditions.
What are the main advantages of using hydro mounts?
Hydro mounts offer exceptional vibration reduction (up to 95%), dramatically improved operator comfort, and enhanced equipment protection. They’re specifically designed for mobile applications with failsafe construction featuring interlocking metal components. The intelligent damping system only activates when needed, providing smooth operation during normal conditions while controlling excessive movement during shock events.
What applications are hydro mounts best suited for?
Hydro mounts excel in heavy-duty mobile applications including operator cabs for construction and agricultural equipment, engine mounting systems, off-highway vehicles, and earthmoving machinery. They’re particularly effective in applications with variable speed engines or equipment that experiences significant shock loads during operation or transport.
How do I determine the right hydro mount for my application?
Selecting the correct hydro mount depends on several factors including equipment weight, operating frequency, expected shock loads, and environmental conditions. Our experienced team can help you identify the optimal solution based on your specific requirements. Contact us with your application details, and we’ll recommend the right hydro mount configuration for your needs.
How do hydro mounts perform in extreme temperature conditions?
Our hydro mounts are engineered to perform across a wide temperature range typical of mobile equipment applications. The hydraulic fluid and rubber compounds are selected to maintain performance characteristics in both hot and cold conditions. For extreme temperature applications, we can recommend specific formulations optimized for your operating environment.
Can hydro mounts be used in safety-critical applications?
Yes, our hydro mounts feature a failsafe design with interlocking metal components, making them suitable for ROPS (Rollover Protective Structures) and FOPS (Falling Object Protective Structures) applications, subject to engineering approval. The robust construction ensures continued protection even if the hydraulic damping system experiences issues.
What maintenance do hydro mounts require?
Hydro mounts are designed for long service life with minimal maintenance. Regular visual inspection for signs of wear, damage, or fluid leakage is recommended. The sealed hydraulic system typically doesn’t require fluid changes during normal service life. We can provide specific maintenance guidelines based on your application and operating conditions.
What’s the typical service life of a hydro mount?
Service life varies depending on application severity, operating conditions, and maintenance practices. Under normal operating conditions, our hydro mounts are designed to provide years of reliable service. The robust construction and quality materials ensure long-term performance even in demanding applications.
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