Auxiliary Hydraulic Hook-up on Bobcat 1845C: A Comprehensive Guide

[MikePhua]

The Bobcat 1845C is a versatile skid steer loader known for its reliability and efficiency in various construction and landscaping applications. One of its standout features is the auxiliary hydraulic system, which allows operators to power a wide range of attachments, from augers to hydraulic breakers. However, understanding how to properly hook up the auxiliary hydraulics can be challenging for some operators. This guide explores how to connect, troubleshoot, and maintain the auxiliary hydraulic system on the Bobcat 1845C.
Understanding the Auxiliary Hydraulic System
The auxiliary hydraulic system in skid steers like the Bobcat 1845C provides a vital function: it powers attachments that require hydraulic power, such as grapple buckets, hydraulic hammers, and augers. The system works by drawing hydraulic fluid from the machine’s main pump, directing it through hoses to power the attachment.
The 1845C uses a standard auxiliary hydraulic setup that includes a pair of quick-connect fittings for easy attachment of hydraulic tools and equipment. These fittings allow you to quickly switch between different attachments without the need for specialized tools.
Key Components of the Auxiliary Hydraulic System:

• Quick-connect couplers: These are the connectors where the hoses from the machine hook up to the attachment. They typically consist of a male and female component, one on the machine side and one on the attachment side.
  
• Auxiliary hydraulic valve: This is a control valve that manages the flow of hydraulic fluid to the attachment.
  
• Hoses and fittings: These transport hydraulic fluid from the machine to the attachment. They need to be securely attached and free of leaks.
  
• Pressure relief valve: Prevents over-pressurization of the system by releasing excess pressure in case of blockages or hydraulic fluid issues.
  

Connecting the Auxiliary Hydraulics
To hook up the auxiliary hydraulics, follow these steps:

1. Power Off the Machine:
   Always turn off the Bobcat 1845C before making any hydraulic connections. This ensures safety by preventing accidental movement of the machine or attachment.
   
2. Locate the Auxiliary Hydraulic Ports:
   On the Bobcat 1845C, the auxiliary hydraulic ports are typically located near the front of the machine, just behind the loader arms. They are usually labeled clearly as "Auxiliary" or "Hydraulic Outlets."
   
3. Inspect the Quick-Connect Fittings:
   Before connecting any hoses, ensure the quick-connect fittings on both the machine and the attachment are clean and free of debris. Dirt and contaminants can damage the hydraulic system, leading to leaks and poor performance.
   
4. Connect the Hoses:
   Line up the male and female connectors of the hydraulic hoses and push them together until they click into place. Be sure to connect the hoses to the correct ports on both the machine and the attachment—there is typically a pressure port and a return port.
   
5. Test the Connection:
   After securing the hoses, test the connection by briefly running the machine. Ensure the hydraulic fluid is flowing properly, and that the attachment operates as expected.
   

Troubleshooting Common Issues
Even with proper installation, issues can occasionally arise with auxiliary hydraulic systems. Here are some common problems and their solutions:

1. Attachment Not Operating Properly:
   If the attachment is not moving as expected, the problem could be due to incorrect hose connections, low hydraulic fluid levels, or an issue with the hydraulic pump. First, check that the hoses are securely attached. Then, inspect the hydraulic fluid levels, as low fluid can cause weak or inconsistent performance.
   
2. Leaking Hydraulic Fluid:
   Leaks often occur at the quick-connect fittings if they are not securely attached or if the seals are damaged. Inspect the connectors for wear or damage, and replace the seals if necessary. Also, check the hydraulic hoses for cracks or holes.
   
3. Low Hydraulic Pressure:
   Low hydraulic pressure can affect the performance of the attachment. This issue may stem from a clogged filter, a faulty hydraulic valve, or a malfunctioning hydraulic pump. It’s crucial to check all components of the hydraulic system, including the filter, pump, and hoses, for any signs of damage.
   
4. Attachment Moving in the Wrong Direction:
   If the attachment moves in the opposite direction than intended, this could be a result of reversed hoses or a malfunctioning auxiliary valve. Double-check that the hoses are connected to the correct ports on both the machine and the attachment.
   

Maintenance Tips for the Auxiliary Hydraulic System
Maintaining the auxiliary hydraulic system on your Bobcat 1845C is critical for ensuring the longevity of the system and the attachments. Here are some essential maintenance tips:

1. Inspect Hoses Regularly:
   Hydraulic hoses are susceptible to wear and tear from abrasion, exposure to the elements, and age. Check hoses for signs of cracking, bulging, or leakage regularly, especially after heavy use. Replace any damaged hoses immediately.
   
2. Clean Quick-Connect Fittings:
   Clean the quick-connect fittings before each use to prevent dirt and debris from entering the hydraulic system. Contamination can cause damage to the internal components and lead to hydraulic failures.
   
3. Check Hydraulic Fluid Levels:
   Maintaining the correct hydraulic fluid level is essential for optimal system performance. Check the hydraulic fluid regularly, and top it off as necessary. Use the correct type of fluid as specified in the operator's manual to prevent system damage.
   
4. Replace Filters:
   Hydraulic filters should be replaced at regular intervals, as specified by the manufacturer. A clogged filter can restrict the flow of hydraulic fluid, leading to low pressure and inefficient operation of the auxiliary system.
   
5. Test Hydraulic Functionality:
   Periodically test the auxiliary hydraulics to ensure that the attachment is functioning properly. If you notice any unusual behavior, such as erratic movement or slow response times, inspect the system for any issues.
   

Enhancing Auxiliary Hydraulic System Performance
To improve the performance of your auxiliary hydraulic system, consider these upgrades and enhancements:

1. Upgrade to High-Flow Hydraulics:
   Some attachments require more hydraulic power than the standard system can provide. If you regularly use high-flow attachments, consider upgrading to a high-flow auxiliary hydraulic system. This modification increases the flow rate, providing more power to attachments that demand higher hydraulic pressure.
   
2. Install a Hydraulic Throttle:
   Installing a hydraulic throttle can give operators more control over the hydraulic pressure, which can be helpful when using different types of attachments. A hydraulic throttle allows you to adjust the pressure to match the needs of the attachment.
   
3. Use a Hydraulic Oil Cooler:
   If you frequently use the auxiliary hydraulics for extended periods, a hydraulic oil cooler can help maintain optimal fluid temperatures. Overheated hydraulic fluid can lead to reduced system performance and damage to components.
   

Conclusion
The auxiliary hydraulic system on the Bobcat 1845C is a powerful tool that significantly increases the versatility of your skid steer loader. By following the proper procedures for connecting, maintaining, and troubleshooting the system, you can ensure that your equipment operates smoothly and efficiently for years to come. Regular maintenance, careful attention to detail, and timely repairs will help prevent issues and keep your machine working at peak performance.