Fairmont H4802 Manual De Instrucciones página 5

Specifications (cont'd)
Hydraulic Power Source
Do not exceed the following hydraulic power source maximums:
• Hydraulic flow: 23 l/min (6 gpm)
• Pressure relief: 138 bar (2000 psi)
• Back pressure: 13.8 bar (200 psi)
Failure to observe this warning could result in severe injury or death.
Type of Hydraulic System ...................................... Open-center or closed-center
Flow
Minimum ............................................................................. 15 l/min (4 gpm)
Recommended ..................................................................... 19 l/min (5 gpm)
Maximum ............................................................................. 23 l/min (6 gpm)
Filtration ............................................................................. 10 micron (nominal)
Pressure Relief Setting .......................................................... 138 bar (2000 psi)
Back Pressure (maximum)* ................................................... 13.8 bar (200 psi)
* 13.8 bar (200 psi) is the maximum agreed standard back pressure for the
HTMA (Hydraulic Tool Manufacturers Association). Fairmont tools will
operate satisfactorily at this standard.
1. Maximum hydraulic fluid temperature must not exceed 60 °C (140 °F).
A sufficient oil cooling capacity is needed to limit the hydraulic fluid
temperature.
2. Hydraulic flow must not exceed 23 l/min (6 gpm). Install a flow meter in
the return line to measure the rate of hydraulic flow before using the tool.
3. Pressure relief valve setting must not exceed 138 bar (2000 psi) at the
tool's maximum flow. Locate the pressure relief valve in the supply circuit
to limit excessive hydraulic pressure to the tool.
Greenlee / A Textron Company
H4802, H4802-1, H4802-6, and 43227 Pole Tampers
Hydraulic Schematic
RELIEF
VALVE
138 bar
RESERVOIR
(2000 psi)
CONTROL
VALVE
PUMP
POWER SOURCE
Recommended Hydraulic Fluids
Use any non-detergent, petroleum-based hydraulic fluid which meets the
following specifications or HTMA specifications.
S.U.S. @
38 °C (100 °F) ............................................................................... 140 to 225
99 °C (210 °F) ............................................................................ 40 minimum
Flash Point .................................................................. 170 °C (340 °F) minimum
Pour Point .................................................................. –34 °C (–30 °F) minimum
5
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
FILTER
(10 micron)
COOLER
T
FLOW METER
P
TOOL