HRD44A Hydraulic Rotary Hammer
Greenlee / A Textron Company
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
7
Specifications
HRD44A Rotary Hammer
Type of Hydraulic System .............................Open-center
Hydraulic Pressure Port ................................... 3/8" NPTF
Hydraulic Return Port ...................................... 3/8" NPTF
Mass/Weight ................................................. 20 kg (44 lb)
Length ...................................................644.7 mm (25.4")
Width (across handles) ................................412 mm (16")
Shank Size ................................................... 7/8" x 4-1/4"
Hydraulic Power Source
Do not exceed the following hydraulic power source
maximums:
Hydraulic flow: 25 l/min (7 gpm)
•
Pressure relief: 207 bar (3000 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
Flow
Minimum ............................................20 l/min (5 gpm)
Maximum ...........................................25 l/min (7 gpm)
Filtration ............................................ 10 micron (nominal)
Pressure Relief Setting ........................ 207 bar (3000 psi)
Back Pressure (maximum) .................... 13.8 bar (200 psi)
Maximum hydraulic fluid temperature must not
•
exceed 60 °C (140 °F). A sufficient oil cooling capacity
is needed to limit the hydraulic fluid temperature.
Hydraulic flow must not exceed 25 l/min (7 gpm).
•
Install a flow meter in the return line to measure the
rate of hydraulic flow before using the tool.
Pressure relief valve setting must not exceed
•
207 bar (3000 psi) at your tool’s maximum flow.
Locate the pressure relief valve in the supply circuit to
limit excessive hydraulic pressure to the tool.
Hydraulic Schematic
FILTER
(10 micron)
COOLER
RELIEF
VALVE
207 bar
(3000 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
