Greenlee Textron / Subsidiary of Textron Inc.
7
4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070
H8508 Hydraulic Impact Wrench
Specifications—Hydraulic Power Source
• Power source flow must not exceed 12 gpm (45.41 lpm).
• Limit relief pressure to 2000 psi (137.9 bar).
Failure to observe these warnings could result in overpressurizing the
system, resulting in severe injury to operator or bystanders.
Any hydraulic power source used with this tool must meet the following requirements:
Flow
Minimum ................................................................................ 4 gpm (15.1 lpm)
Recommended ...................................................... 5 - 8 gpm (18.9 - 30.3 lpm)
Maximum ............................................................................. 12 gpm (45.4 lpm)
Operating Pressure
Minimum ............................................................................. 1000 psi (96.6 bar)
Maximum .......................................................................... 2000 psi (137.9 bar)
Pressure Relief Setting ........................................................... 2000 psi (137.9 bar)
Back Pressure
Maximum* .............................................................................200 psi (13.8 bar)
Filtration ................................................................................. 10 Micron (Nominal)
Type of Hydraulic System ...................................... Open-Center or Closed-Center
*
200 psi is the maximum agreed standard back pressure for the Hydraulic
Tool Manufacturers Association (HTMA). Greenlee Fairmont tools will
operate satisfactorily at this standard.
1.
Maximum fluid temperature must not exceed 140
°
F (60
°
C) at the maximum
expected ambient temperature. A sufficient oil cooling capacity is needed to
limit the fluid temperature.
2.
Maximum flow must not exceed 12 gpm (45.4 lpm). Install a flow meter in
the return line to test the rate of flow in the system before working the tool.
3.
Pressure relief valve must not exceed 2000 psi (137.9 bar) @ 10 gpm
(37.8 lpm). The pressure relief valve must be located in the supply circuit
between the pump and tool to limit pressure to the tool.
Figure 2 shows a typical hydraulic power source being used with the tool.
