Greenlee / A Textron Company
7
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
38568 • 43177 • 43178 Long-Reach Chain Saws
Hydraulic Schematic
FILTER
(10 MICRON)
COOLER
RELIEF
VALVE
138 bar
(2000 psi)
CONTROL
VALVE
FLOW METER
T
P
TOOL
RESERVOIR
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
Specifications
(cont’d)
Hydraulic Power Source
Do not exceed the following hydraulic power source maximums:
Hydraulic flow: 30.3 l/min (8 gpm)
•
Pressure relief setting: 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 .................................................................................18.9 l/min (5 gpm)
Recommended ........................................................................22.7 l/min (6 gpm)
Maximum ................................................................................30.3 l/min (8 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). Greenlee Utility tool will operate satis-
factorily 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 30.3 l/min (8 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 your tool’s
maximum flow. Locate the pressure relief valve in the supply circuit to limit
excessive hydraulic pressure to the tool.
