Adding Auxiliary Hydraulics to Your Heavy Equipment

[MikePhua]

In the world of heavy equipment, auxiliary hydraulics are essential for powering attachments that require hydraulic fluid to function, such as augers, breakers, and grapples. Adding auxiliary hydraulics to a machine can significantly increase its versatility, making it capable of performing a wider range of tasks. However, the process of adding auxiliary hydraulics is not always straightforward and involves a number of considerations that need to be addressed for proper installation and operation.
What Are Auxiliary Hydraulics?
Auxiliary hydraulics refer to additional hydraulic circuits that are installed on a machine to power attachments. These systems work alongside the primary hydraulic system of the machine, which typically controls basic movements like lifting, tilting, and steering. Auxiliary hydraulics are used when attachments need extra hydraulic power to function—powering tools such as:

• Hydraulic breakers: Used in demolition tasks to break rock or concrete.
  
• Augers: For drilling holes in soil, rock, or other materials.
  
• Grapples: Used in forestry or material handling to pick up and move objects.
  
• Brush cutters: For clearing vegetation.
  

These attachments often require a different flow rate, pressure, or type of connection compared to the primary hydraulic functions, and that's where adding auxiliary hydraulics comes into play.
Why Add Auxiliary Hydraulics?

1. Increased Versatility
   Adding auxiliary hydraulics increases the functionality of your machine, allowing it to operate a range of attachments. This is particularly beneficial for contractors and operators who need to switch between different tools frequently, without requiring additional machinery.
   
2. Improved Efficiency
   By equipping your machine with auxiliary hydraulics, you eliminate the need for separate, standalone machines for various tasks. For instance, a skid steer or mini-excavator with auxiliary hydraulics can be used for digging, demolition, and lifting—all with the same base machine, making it more efficient.
   
3. Cost-Effectiveness
   Investing in auxiliary hydraulics is generally more cost-effective than buying multiple machines for different tasks. Instead of purchasing a new piece of equipment for each job, a single machine with auxiliary hydraulic capabilities can accomplish a broader range of work, saving both time and money.
   

Considerations Before Adding Auxiliary Hydraulics

1. Hydraulic System Compatibility
   The first step in adding auxiliary hydraulics is ensuring that your machine’s hydraulic system can support the additional load. Not all machines are designed to accommodate auxiliary hydraulic circuits, so it is important to check the manufacturer's specifications or consult with a professional. If the existing hydraulic pump does not have enough capacity, you may need to upgrade it to a higher-flow unit.
   
2. Required Flow and Pressure
   Different attachments require different flow rates and pressure. For example, a hydraulic breaker typically requires a high flow of hydraulic fluid, while an auger may need less. Therefore, when adding auxiliary hydraulics, you must determine the required flow and pressure for the attachments you intend to use. This will help you select the correct fittings, hoses, and controls that can handle the necessary load.
   
3. Space and Mounting Options
   Adding auxiliary hydraulics often involves installing new components such as a hydraulic valve, hoses, and fittings. Consider where these components will be installed on the machine. For machines with limited space, additional brackets or modifications may be necessary. Proper placement ensures that the new components do not interfere with other operational systems and are easily accessible for maintenance.
   
4. Control Systems
   Many machines use joysticks or foot pedals for controlling the primary hydraulics. When adding auxiliary hydraulics, you may need to integrate additional controls for the new circuit. Some machines allow you to add switches to control the hydraulic flow to attachments, while others may require more complex solutions like a new joystick or foot pedal configuration.
   

Steps for Adding Auxiliary Hydraulics

1. Select the Right Hydraulic Kit
   Various manufacturers offer hydraulic kits designed for specific machines, such as skid steers, excavators, and loaders. These kits typically include all the necessary components for adding auxiliary hydraulics, including pumps, hoses, fittings, and control systems. It’s important to select a kit that is compatible with your machine’s model and specifications.
   
2. Install the Hydraulic Pump
   The hydraulic pump is the heart of the auxiliary hydraulic system, providing the necessary flow and pressure. In many cases, machines already have an auxiliary pump installed, but if not, you’ll need to install one that matches the required flow rate and pressure for your attachments. Installation should be done by a professional to avoid damage to the machine’s primary hydraulic system.
   
3. Run Hydraulic Hoses and Fittings
   Next, run the hydraulic hoses from the pump to the appropriate connection points. Ensure that the hoses are of the correct diameter and rated for the necessary pressure. It’s also important to securely fasten the hoses to prevent them from rubbing against sharp edges, which could cause wear and lead to leaks.
   
4. Install Control Valves and Switches
   Once the hydraulic system is installed, you need to add the necessary control valves or switches. These devices regulate the flow of hydraulic fluid to the attachments. Depending on the system, you may be able to control the auxiliary hydraulics through the existing joystick, or you may need to add a new control unit.
   
5. Test the System
   After installation, thoroughly test the system to ensure it is working as expected. Check for leaks, verify that the pressure is consistent, and test the attachment to ensure that it operates efficiently. It’s essential to ensure that the flow rate and pressure are within the correct range for the attachments you plan to use.
   

Potential Challenges

1. Hydraulic System Strain
   Adding auxiliary hydraulics can place additional strain on the machine’s hydraulic system. If the existing system is not designed for high flow, this can lead to overheating, reduced performance, or premature wear of the pump and other components.
   
2. Cost of Installation
   Depending on the machine and the complexity of the hydraulic system, installing auxiliary hydraulics can be costly. This includes not just the cost of parts but also labor for installation. It’s important to weigh this investment against the long-term benefits of added functionality.
   
3. Maintenance and Repairs
   Like any additional system, auxiliary hydraulics require regular maintenance. This includes checking for leaks, replacing hoses, and ensuring that the system is functioning properly. Inadequate maintenance can lead to costly repairs and downtime.
   

Conclusion
Adding auxiliary hydraulics to a machine significantly enhances its capabilities, allowing operators to utilize a wider range of attachments and increase overall productivity. However, the process requires careful consideration of the hydraulic system’s compatibility, the required flow and pressure, and the integration of new control systems. While the installation can be complex and costly, the long-term benefits—improved versatility, cost-effectiveness, and efficiency—make it a worthwhile investment for many operators. Proper maintenance and understanding of the hydraulic system will ensure that the added capabilities operate smoothly and provide lasting value to the machine.