HRD44A Hydraulic Rotary Hammer
Greenlee / A Textron Company
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
2
Description
The HRD44A Rotary Hammer is intended to drill holes
in rock or concrete. This heavy-duty tool is designed
for use on open-center hydraulic systems. A built-in
flushing valve, used to force air through the bit to clear
debris from the hole while drilling, starts and stops the
flow of air automatically.
The tool accepts standard breaker accessories for
breaking or driving applications.
Safety
Safety is essential in the use and maintenance of
Greenlee Utility tools and equipment. This instruction
manual and any markings on the tool provide informa-
tion for avoiding hazards and unsafe practices related to
the use of this tool. Observe all of the safety information
provided.
Purpose of this Manual
This manual is intended to familiarize personnel with
the safe operation and maintenance procedures for the
Greenlee Utility HRD44A Rotary Hammer.
Keep this manual available to all personnel.
Replacement manuals are available upon request at no
charge at www.greenlee.com.
Other Publications
Tool Owners/Users
SAE Standard J1273 (Hose and Hose Assemblies):
Publication 99930323
All specifications are nominal and may change as design
improvements occur. Greenlee Textron Inc. shall not be liable for
damages resulting from misapplication or misuse of its products.
KEEP THIS MANUAL
Table of Contents
Description .................................................................... 2
Safety ............................................................................ 2
Purpose of this Manual ................................................. 2
Other Publications ......................................................... 2
Important Safety Information .....................................3–5
Identification .................................................................. 6
Specifications ................................................................ 7
Hoses and Fittings ........................................................ 8
Hose Connections ......................................................... 8
Typical Setup ................................................................. 8
Setup ............................................................................. 9
Operation ....................................................................... 9
Maintenance ................................................................ 10
Troubleshooting ........................................................... 11
Illustrations .............................................................12–13
Parts List ..................................................................... 14
Accessories ................................................................. 15
