Greenlee / A Textron Company
7
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
HPB55 Series Hydraulic Paving Breaker
Specifications
HPB55 Series
Type of Hydraulic System .......................... Open-center
Weight (without hoses and tool) ..............26.1 kg (58 lb)
Steel Size (standard) ................. 1-1/8" x 6", 1-1/4" x 6"
Working Pressure ..... 105 to 125 bar (1500 to 1800 psi)
Hydraulic Oil
Working Temperature ............30 to 70 °C (86 to 158 °F)
Accumulator Charging
Pressure (nitrogen) ............................... 50 bar (723 psi)
Blow Frequency ............19 to 31 Hz (1140 to 1860/min)
Impact Energy ................................................110 Joule
Hydraulic Port Connections ........................... 1/2" BSP
Vibration Level (3 axis) ................................ a = 4.6 m/s
2
Sound Power Level
Guaranteed ..........................................L
wa
= 112 dB
Measured .............................................L
wa
= 108 dB
Hydraulic Power Source
Do not exceed the following hydraulic power
source maximums:
• Hydraulic flow: 30 l/min (8 gpm)
• Pressure relief: 160 bar (2300 psi)
• Back pressure: 28 bar (405 psi)
Failure to observe this warning could result in
severe injury or death.
Type of Hydraulic System .......................... Open-center
Flow
Minimum ......................................... 18 l/min (5 gpm)
Maximum ........................................ 30 l/min (8 gpm)
Filtration ..........................................10 micron (nominal)
Pressure Relief Setting ..................... 160 bar (2300 psi)
Back Pressure (maximum) .................... 28 bar (405 psi)
• Optimal performance occurs at maximum flow.
• Maximum hydraulic fluid temperature must not
exceed 70 °C (158 °F). A sufficient oil cooling
capacity is needed to limit the hydraulic fluid
temperature.
• Hydraulic flow must not exceed 30 l/min (8 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
160 bar (2300 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
160 bar
(2300 psi)
CONTROL
VALVE
FLOW METER
T
P
TOOL
RESERVOIR
PUMP
POWER SOURCE
