Is 17.2 GPM Hydraulic Flow Enough for Compact Equipment Attachments

[MikePhua]

Hydraulic Flow and Attachment Compatibility
Hydraulic flow, measured in gallons per minute (GPM), determines how quickly and effectively an attachment can perform its function. A flow rate of 17.2 GPM is considered moderate and is typical for mid-range compact equipment such as skid steers, small excavators, and utility tractors. This flow rate is sufficient for many standard attachments, including:

• Augers up to 24 inches
  
• Standard trenchers
  
• Light-duty brush cutters
  
• Grapples and forks
  
• Small concrete breakers
  

However, high-demand attachments like cold planers, stump grinders, and large flail mowers often require 25–40 GPM or more, especially when used in commercial or continuous-duty applications. Attempting to run these tools on a 17.2 GPM system may result in sluggish performance, overheating, or premature wear.
Understanding Flow vs Pressure
It’s important to distinguish between flow (GPM) and pressure (PSI). Flow determines speed, while pressure determines force. A system with 17.2 GPM at 3,000 PSI can still deliver substantial torque, but may struggle to maintain speed under load. For example, a hydraulic auger may spin effectively but slow down dramatically when encountering dense clay or rock.
To optimize performance, users should:

• Match attachments to both flow and pressure specs
  
• Use flow dividers or restrictors to protect sensitive components
  
• Monitor fluid temperature during extended use
  

Evaluating Equipment Choices
When selecting a machine with 17.2 GPM flow, consider the intended workload. For property maintenance, fencing, and light excavation, this flow rate is more than adequate. For forestry mulching or asphalt milling, a high-flow system is essential. Some manufacturers offer high-flow upgrade kits, which include larger pumps, reinforced hoses, and cooling enhancements.
Brands like Bobcat, Kubota, and New Holland offer models with optional high-flow circuits. For example, the Bobcat S650 delivers up to 23 GPM standard and 36.5 GPM high-flow, making it versatile across attachment types.
A Case from the Pacific Northwest
A landowner in Oregon purchased a mid-size skid steer with 17.2 GPM flow to clear brush and install fencing. Initially satisfied, he later added a flail mower for roadside maintenance. The mower ran, but bogged down in thick grass. After consulting a dealer, he upgraded to a high-flow model and saw a 40% increase in cutting speed and 25% reduction in fuel consumption, due to more efficient hydraulic performance.
Tips for Maximizing 17.2 GPM Systems

• Use attachments with low-flow compatibility labels
  
• Avoid multitasking hydraulics (e.g., running tilt and cutter simultaneously)
  
• Clean filters and check fluid levels regularly
  
• Install a hydraulic cooler if operating in hot climates
  
• Consider electric or PTO-driven alternatives for high-demand tools
  

Conclusion
A hydraulic flow rate of 17.2 GPM is sufficient for many compact equipment tasks, but not all. The key is matching the machine’s capabilities to the attachment’s requirements. For users focused on general property work, landscaping, or light construction, this flow rate offers a good balance of power and efficiency. For heavy-duty or commercial operations, investing in high-flow systems will yield better performance and longer equipment life.