Running a Hydraulic Pole Tamper on the Kubota SVL95-2s Compact Track Loader

[MikePhua]

The SVL95-2s and Its Hydraulic Capabilities
The Kubota SVL95-2s is a high-performance compact track loader designed for demanding applications such as grading, land clearing, and heavy attachment use. Introduced as part of Kubota’s SVL series, the 95-2s features a turbocharged 96.4-horsepower diesel engine and a robust hydraulic system capable of delivering up to 40 gallons per minute in high-flow mode. Its auxiliary hydraulic circuit supports a wide range of tools, from mulchers to trenchers, and is controlled via in-cab presets that allow operators to adjust flow rates and pressure settings.
Kubota, founded in 1890, has become a global leader in compact construction equipment. The SVL series has sold tens of thousands of units across North America and Asia, with the 95-2s being one of the most popular models for contractors seeking power and versatility in a compact footprint.
Understanding Pole Tampers and Hydraulic Compatibility
A hydraulic pole tamper is a handheld compaction tool used to compress soil around utility poles, fence posts, or other vertical structures. Unlike skid-mounted post drivers, pole tampers are typically designed for use with hydraulic tool circuits found on utility trucks or portable hydraulic power units. These tampers operate at relatively low pressure and flow:

• Pressure rating: ~2,000 psi
  
• Flow requirement: ~7 gallons per minute
  
• Open-center hydraulic design
  

The SVL95-2s, by contrast, delivers significantly higher pressure—often exceeding 3,000 psi—and much higher flow rates. This mismatch can lead to seal failure, overheating, or damage to the tamper if connected directly without regulation.
Risks of Direct Connection and System Mismatch
Connecting a low-pressure tool like a pole tamper directly to the SVL95-2s auxiliary circuit poses several risks:

• Overpressure can rupture seals or damage internal components
  
• Excessive flow may cause erratic tool behavior or overheating
  
• Running the loader at low idle to reduce flow may compromise emissions systems
  
• Lack of feedback control can lead to unsafe operation
  

A contractor in Colorado attempted to run a Greenlee pole tamper off his SVL95-2s at idle, hoping to limit flow. While the tool operated briefly, seal failure occurred within hours due to pressure spikes during throttle changes.
Solutions for Safe Integration
To safely operate a pole tamper with the SVL95-2s, hydraulic regulation is essential. Recommended components include:

• Flow control valve with adjustable output
  
• Pressure relief valve set to 2,000 psi
  
• Inline pressure gauge and flow meter
  
• Tee fittings for pressure and return lines
  
• Needle valve for fine-tuning flow
  

Installation strategy:

• Mount flow control valve near the attachment point
  
• Tee into pressure and return lines using quick couplers
  
• Set relief valve fully open, then gradually close while monitoring flow
  
• Use a flow meter to confirm 7 gpm output
  
• Adjust engine RPM to maintain stable hydraulic performance
  

A technician in Ontario used a Northern Tool flow control valve (model 69823) and a pressure gauge to regulate output. After careful setup, the pole tamper ran smoothly at 1,500 RPM with no overheating or seal damage.
Alternative Power Sources and Retrofit Options
If hydraulic regulation proves too complex, consider alternative approaches:

• Use a portable hydraulic power unit (HPU) rated for 2,000 psi and 7 gpm
  
• Retrofit the tamper with a gas-powered drive motor
  
• Replace the tamper with a skid-mounted post driver compatible with SVL95-2s flow rates
  

Some contractors have adapted pole tampers for use with mini excavators that offer lower hydraulic output, reducing the need for complex regulation.
Safety and Maintenance Considerations
When working with hydraulic systems:

• Always depressurize lines before disconnecting
  
• Wear eye protection and gloves during setup
  
• Inspect hoses and fittings for wear or leaks
  
• Monitor tool temperature during operation
  
• Avoid running the loader at idle for extended periods
  

Hydraulic fluid should meet ISO 46 or Kubota-approved specifications. Replace filters every 500 hours and flush the system annually to prevent contamination.
Conclusion
Operating a hydraulic pole tamper on the Kubota SVL95-2s requires careful attention to pressure and flow compatibility. With proper regulation using flow control and relief valves, the tamper can be safely integrated into the loader’s hydraulic system. While not a plug-and-play attachment, the SVL95-2s offers the flexibility and power to support specialized tools—provided the setup respects the limits of both machine and attachment.