Understanding the Auxiliary Hydraulics on the CAT 35D

[MikePhua]

Introduction
Auxiliary hydraulics are an important feature on compact equipment such as the CAT 35D skid steer. These hydraulics provide extra power to attachments, enhancing the machine’s versatility. Understanding the auxiliary hydraulics system is crucial for operators to maximize performance, troubleshoot issues, and ensure the smooth operation of various attachments.
Overview of Auxiliary Hydraulics on the CAT 35D
The CAT 35D is designed with auxiliary hydraulics to support a wide range of attachments, from augers to grapples, improving the efficiency and versatility of the machine. The auxiliary hydraulic system on the 35D is built to deliver consistent power to the attachments while maintaining control and safety.
Types of Auxiliary Hydraulic Systems
There are typically two main types of auxiliary hydraulic systems on machines like the CAT 35D: Standard Flow and High Flow. Each type serves a different purpose and offers varying levels of hydraulic power.

• Standard Flow: This is the basic system, suitable for light to medium-duty attachments such as buckets, forks, or basic augers. Standard flow systems typically offer lower pressure and flow rates.
  
• High Flow: High flow hydraulics deliver higher pressure and flow, making them suitable for more demanding attachments such as large mulchers, hydraulic breakers, and snow blowers. The high flow system is ideal when operators need to power heavier-duty attachments that require greater hydraulic output.
  

Flow Rate and Pressure
The CAT 35D’s auxiliary hydraulics come with specific flow rate and pressure specifications, which determine the types of attachments it can effectively support. For the CAT 35D:

• Standard Flow: Typically delivers 16-23 gallons per minute (GPM) at around 3,000 PSI.
  
• High Flow: Provides up to 30 GPM, operating at around 3,500 PSI.
  

The flow rate and pressure affect how quickly the attachment operates and how much power it can generate. Using the right system for the attachment is crucial for efficient performance and to avoid damaging the machine or the attachment.
Important Considerations for Operators

1. Attachment Compatibility: When selecting attachments for the CAT 35D, it's important to match the hydraulic requirements of the attachment to the machine’s available hydraulic flow. Using a high-flow attachment with a standard-flow machine may result in insufficient power, while using a high-flow system with a compatible high-flow attachment will optimize performance.
   
2. Hydraulic Oil Quality and Maintenance: To ensure smooth operation, the hydraulic fluid used in the auxiliary system should be clean and free of contaminants. Regularly check and change the hydraulic oil as needed to prevent issues such as clogged filters or loss of pressure.
   
3. Troubleshooting: If the auxiliary hydraulics aren’t functioning properly, common causes may include blocked hoses, incorrect pressure settings, or malfunctioning solenoids. Operators should regularly inspect hydraulic lines and components for leaks, damage, or blockages. It’s also important to listen for unusual sounds that may indicate a problem with the pump or system.
   
4. Flow Control: Some attachments may require variable flow, meaning the operator can control the speed and intensity of the hydraulic power. This is especially important for attachments that need precise operation, like backhoes or trenchers.
   
5. Attachment Attachment Settings: Operators should always ensure that the right settings are used on both the machine and the attachment. This can prevent unnecessary wear and tear on the system, allowing both the machine and the attachments to perform optimally.
   

Benefits of Auxiliary Hydraulics
The auxiliary hydraulic system on the CAT 35D provides several benefits to operators, including:

• Increased Versatility: By enabling a wide range of attachments, operators can complete a variety of tasks without needing multiple machines.
  
• Improved Efficiency: Using the correct hydraulic system for the job leads to faster work completion and reduced downtime.
  
• Cost-Effectiveness: With auxiliary hydraulics, the operator can use attachments to handle different types of work, reducing the need for additional equipment.
  

Conclusion
The auxiliary hydraulic system on the CAT 35D is a critical feature that enhances the machine’s capabilities. By understanding the system’s flow rates, pressure, and compatibility with various attachments, operators can improve their efficiency and maximize the performance of the equipment. Regular maintenance and proper operation are key to ensuring that the auxiliary hydraulics function optimally for every task.