Allied Hy-Ram HR270 Guide

Thoroughly read and understand the content of this manual before using the Allied Breaker. The safe and efcient
use of the Allied equipment depends upon proper installation, operation, maintenance and training.
Keep this manual in a convenient location so that it is easily accessible for future reference. Contact your Allied
Dealer or the Allied Customer Service Department for replacement manuals. Inquiries regarding the content of this
manual must include effective date shown on inside cover.
SOM577202
Hy-RamHy-Ram
Hydraulic
Impact
Breaker
Model
HR270
HR290
Safety, Operation and Maintenance

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Contact Information
3900 Kelley Ave
Cleveland, Ohio 44114
E-mail: [email protected]
Tel: [phone] Fax: [phone]
Revision History of Document 577202
Continuous improvement of our products is an Allied policy. The material in this publication, including figures, captions,
descriptions, remarks and specifications, describe the product at the time of its printing, and may not reflect the product in
the future. When changes become necessary, these will be noted in the table below. Specifications are based on published
information at the time of publication. Allied Construction Products, LLC, reserves the right to change, edit, delete or modify
the content of this document, including descriptions, illustrations and specifications without prior notification. For product or
document updates go to www.alliedcp.com .
Effective Date Page Summary of Change
2014 Mar Original Issue of SOM577202. Information for HR270,
HR290 found previously in SOM575469.

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Safety Information
Safety Statements and Hazard Alerts
Safety messages appear throughout this manual and
on labels affixed to the Allied equipment. Read and
understand the information communicated in safety
messages before any attempt to install, operate,
service or transport the Allied equipment.
Keep all safety labels clean. Words and illustrations
must be legible. Before operating this equipment,
replace damaged or missing labels.
Purpose of Safety Messages
Safety messages provide information that is
important for your safety. These messages
communicate the extent, magnitude and likelihood of
injury associated with unsafe practices such as
misuse or improper handling of the Allied equipment.
Safety messages also explain how injury from
potential hazards can be avoided.
Safety messages presented throughout this manual
communicate the following information:
1. Alert personnel to potential hazards
2. Identify the nature of the hazard
3. Describe the severity of the hazard, if
encountered
4. Instruct how to avoid the hazard
Safety Alert Symbol
Fig. S1
ATTENTION, BECOME ALERT, YOUR SAFETY IS
INVOLVED – CAUTION REQUIRED.
Fig. S1. The exclamation point within an equilateral
triangle is the safety alert symbol. This symbol, either
used alone or with a signal word, is used to draw
attention to the presence of potential hazards.
Signal Words
“DANGER”, “WARNING” and “CAUTION” are signal
words used to express severity of consequences
should a hazard be encountered.
DANGER - Indicates an imminent hazard, which, if
not avoided, will result in death or serious injury.
WARNING - Indicates an imminent hazard, which, if
not avoided, can result in death or serious injury.
CAUTION - Indicates hazards which, if not avoided,
could result in serious injury or damage to the
equipment.
Safety messages are displayed in a uniform
arrangement as shown in Fig S2.
CAUTION
Burn injury from contact with hot
surface. Some components become hot
during operation. Allow parts and fluids
to cool before handling.
Fig. S2 Safety Message – Typical Presentation
Signal Words Used for Non-Hazard Messages
Other message types that appear in this manual
utilize signal words "IMPORTANT" and "NOTE".
These are used only for the purpose of notifying
personnel to instructions and suggestions but do not
pose a safety hazard to workers.
IMPORTANT – Identify instructions that if not
followed, may diminish performance; interrupt
reliability and production or cause equipment
damage.
NOTE – Highlight suggestions, which will enhance
installation, reliability, or operation.

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Safety Information – [cont’d]
Safety, Information and Identification Labels
Information labels affixed to the Allied equipment
include safety warnings, identification and
instructions important to operation and service. Refer
to Figure “L14” for their location on the equipment.
Keep all safety labels clean. Words and illustrations
must be readable. Before operating this equipment,
replace damaged or missing labels. For replacement,
refer to the appropriate Parts Manual for
identification.
Figure Label Description
L1
READ INSTRUCTIONS - Decal directs personnel to the manual for
further information / instructions.
L2
STAY CLEAR – Decal alerts personnel and by-standers to maintain a
safe distance from the Breaker while in operation.
L3
FLYING DEBRIS – Alerts personnel to the hazard of debris becoming
projectiles and the need for a protective guard to shield the operator
from injury. It directs personnel to the Operator’s Manual for safety
instructions. NOTE: Place the smaller size decal in a conspicuous
location inside the operator’s cab.
L4
TOOL SHARPENING – Decal warns against welding, cutting, or hard-
facing the tool. It directs personnel to the Operator’s Manual for
approved sharpening methods.
L5*
PRESSURIZED NITROGEN ACCUMULATOR – Decal warns of
pressurized gas and directs personnel to the Repair Manual for service
instructions. *HR175 and HR230 are not equipped with accumulator.
L6
GAS PRE-CHARGE –Decal outlines measuring / charging the back
head. Alerts personnel to the following –
Maintenance interval – every 2 weeks
Proper position when measured / charged
Charge pressure when COLD vs. HOT
Refers personnel to the Operation and Maintenance Manual
Cautions personnel to use nitrogen gas only
L7 LIFT POINT – Decal identifies approved lift points.
U
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H
F
E
R
E
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V
F
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B
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N
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NITROGEN
PRESSURIZED
ACCUMULATOR
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Safety Information – [cont’d]
Fig. Label Description
L8
LUBRICATION – Decal emphasizes key re-lubrication instructions,
including; frequency and precautions that must be observed to ensure
breaker is not damaged through unapproved methods.
L9
LUBRICATION POINT – Decal identifies lubrication points. Refer to
the manual(s) for grease type, re-lubrication schedules and
procedures. Risk of equipment damage if instructions are not followed.
L10
PRESSURE I.D. TAG - The oil supply hose is tagged for ease of
identification.
L11
ALLIED LOGO – This decal is the Allied brand identifier and is a
registered trademark of Allied Construction Products, LLC.
L12 HR230 MODEL – Decal identifies the specific model.
L13
EQUIPMENT ID TAG - Contains identifying information about the
equipment, including: Manufacturer’s name, address, product name,
model number, serial number, year of manufacture, and weight.
Fig. L14 Label Positions

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Safety Information – [cont’d]
Meaning of Pictograms
Pictograms are used to rapidly communicate
information. For the purposes of this manual and
labels affixed to the Allied equipment, pictograms are
defined as follows:
Read the manual
Refer to the manual for further
details
Procedures are explained in
the manual
Read the Service Manual For
Additional Information
Crush point
Moving part (in direction indicated
by arrow)
Falling object
Unsupported loads
Personal Protection Equipment
Hearing protection
Safety eyewear
Gloves
Safety shoes
Falling part
Personnel maintain a safe
distance from breaker
Fragments / debris
becoming airborne
projectiles
Protective guards required
on cab when operating this
work tool
Leaking fluid under
pressure
Hot surfaces
Gas / Oil under pressure
Shut off carrier & remove
key before servicing
Identifies lift point
Figures marked with an X-
out or a circle with a
diagonal slash describes a
prohibited action.
Prohibited actions must be
avoided to prevent injury
and/or equipment damage
The check mark symbol is
used to indicate actions
and methods that are
recommended, correct and
approved

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Safety Information – [cont’d]
Qualified Person
For the purposes of this manual, a qualified person
is an individual that has successfully demonstrated
or completed the following:
Has read, fully understands and adheres to all
safety statements in this manual.
Is competent to recognize predictable hazardous
conditions and possess the authorization, skills
and knowledge necessary to take prompt
corrective measures to safeguard against
personal injury and/or property damage.
Has completed adequate training in safe and
proper installation, maintenance and operation
of this Allied equipment.
Is authorized to operate, service and transport
the Allied equipment identified in Table 1.1.
Safety Information Overview
It’s important for all personnel working with the Allied
equipment to read this manual in its entirety. It
includes important safety information intended to
help personnel avoid unsafe practices that may lead
to mishaps. Safety information described at the
beginning of this manual is generic in nature. As you
continue reading through later sections of this
manual, instructions and safety information become
tool-specific and operation-specific.
Allied has made every effort to provide information
as complete and accurate as possible for this
document. Allied cannot anticipate every possible
circumstance that might involve a potential hazard.
The warnings in this manual and labels affixed to the
Allied attachment are therefore not all inclusive.
General Construction Safety
Always follow procedures that promote safe
conditions for workers and bystanders. The standard
safety precautions expected and required of those
working in construction shall include, but not limited
to:
Locating existing underground service and utility
lines
Establishing pedestrian barriers
Using personnel protection equipment
appropriate to working conditions, etc.
Federal, State, Local and OSHA Construction
Guidelines and Regulations
Use the Allied equipment in accordance with all
federal, state and local regulations regarding
construction practices and public safety.
Identification of, and compliance to, governing
regulations are the responsibility of the owner and
operator.
In the United States, comply with the
recommendations of the Occupational Safety and
Health Administration standards of the U.S.
Department of Labor. For OSHA construction
guidelines contact your local federal government
office or write:
U.S. Government Printing Office Superintendent of
Documents P.O. Box 371954 Pittsburgh, Pa. 15250-
7954
Website: www.osha.gov
Ask for Construction Industry OSHA Standards
Stock #869-034-00107-6.
Owner’s Responsibilities
Ensure that only qualified personnel operate and
service the Allied equipment.
Ensure personnel protection equipment is available
to personnel and enforce the use of PPE
Ensure equipment is kept in safe operating condition
Ensure safety-related materials such as instructions
and including this manual are kept in a convenient
location so that they are easily accessible to
operators and maintenance personnel.
Attention Read the Manual
Improper installation, operation or maintenance of
the Allied equipment could result in serious injury or
death. Only qualified operators may operate the
Allied equipment. Personnel responsible for the
maintenance of the Allied equipment or its systems,
including inspection, installation or adjustments must
also be qualified. Operators and personnel
responsible for maintenance of this equipment
should read this manual. Other manuals, such as
those published by the machinery used in support of
the Allied equipment, should also be read.

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Safety Information – [cont’d]
Operational Safety Program
The safe and efficient use of the Allied equipment
depends upon proper installation, operation,
maintenance and repair. Operational safety programs
must encompass all of these elements.
Accident prevention through operational safety
programs are most effective when the equipment
owner further develops the program by taking into
account his own experience in using and maintaining
equipment.
Developing such programs will help minimize
equipment downtime, while maximizing service life
and performance. Most importantly, it will minimize
the risk of personal injuries.
Personal Protective Equipment (PPE)
Personnel operating or nearby the equipment that
may be exposed to the hazard of falling, flying and
splashing objects, or exposed to harmful dusts,
fumes, mists, vapors, or gases shall use the
particular personal protection equipment (PPE)
necessary to protect them from the hazard. Such
PPE may include safety eyewear, face shield,
hearing protection, safety footwear, gloves, and dust
mask. Supervisors shall review proper PPE selection
and ensure PPE is made available to personnel.
Personnel are responsible for wearing PPE as
directed by the supervisor.
Protective Equipment - Guarding
Allied equipment designed with guards shall have
guards in place when equipment is in use. Guards
are fitted to the equipment to protect against unsafe
situations that could not be eliminated through design
measures. Where it was not possible to prevent an
unsafe situation by means of a guard, safety
messages appear on the equipment, warning
personnel of a hazardous condition.
Guards shall not be removed unless for the purpose
of inspection and service of components. All guards
must be reinstalled after service or adjustments are
completed. Do not operate the Allied equipment
without guards installed.
Additional guarding, not included with the Allied
equipment, is necessary at the operator’s station to
protect the operator and other nearby personnel
against flying debris from material being cut or
demolished. Do not handle, demolish or cut material
overhead without proper guards installed.
To prevent accidental start up, the control switch
shall be located in a protected area that is guarded
and makes it difficult to accidently operate the
equipment.
Unapproved Use or Modifications
In order to provide and maintain efficient operation
with reliable service, while ensuring operator safety,
the Allied equipment may not be used for any other
purpose other than, for which it was intended. Use of
the Allied equipment, other than those cited in this
manual, may place personnel at risk of injury and/or
may subject the equipment to damage.
When making repairs, use only the manufacturer's
genuine parts. Substitute parts may not meet the
required standards for fit and quality, or may impair
function, safety and performance. The Allied
equipment shall not be modified or used in
unapproved applications unless written consent is
received from the Allied Engineering Department.

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Table of Contents
Section Pg.
Record of Document Revisions……………….… i
Safety Information.…………………………………. ii
Safety Statements and Hazard Alerts……………… ii
Purpose of Safety Messages……….……………… ii
Safety Alert Symbol...…………..…………………… ii
Signal Words………………………………………… ii
Non-Hazard Signal Words………….………………. ii
Safety, Information & Identification Labels……….. iii
Meaning of Pictograms ..…………………………… v
General Safety Precautions………........................ vi
Qualified Person…………….…..………………….. vi
General Construction Safety……….…. vi
Federal, State, Local and OSHA Construction
Guidelines and Regulations……………….……….. vi
Owner’s Responsibilities……….….………………. vi
Operational Safety Program……………………….. vii
Protective Equipment – PPE and Guarding vii
Unapproved Modifications………………………….. vi
Table of Contents……..……................................ viii
List of Figures…..…………………………………… x
1.0 Introduction & Scope.…………………………. 1
1.1 Purpose of This Manual………………………… 1
1.2 About This Manual……………..................... 1
1.3 How to Order Replacement Publications…… 1
1.4 Related Publications….…………....................... 1
2.0 Equipment Identification…………….………... 3
2.1 Serial Number Location.………..………………. 3
2.2 Equipment Identification Tag….………………. 3
2.3 Record Equipment Information.……………….. 3
3.0 Warranty Protection Summary…………..…… 4
3.1 Overview…….……………….…………………….. 4
3.2 Owner’s Responsibilities……..…........................ 4
3.3 Allied Product Policies……………...................... 5
Section Pg.
4.0 Product Information…………………..…….….. 6
4.1 Description and Use……………………..…….. 6
4.2 Familiarization of Main Components………... 6
4.3 Principle of Operation……………………..……. 6
5.0 Sizing the Breaker…...………………………… 8
5.1 Breaker Selection - General……………………. 8
5.2 Auxiliary Circuits & Conversion Kits…………… 8
6.0 Operation….……………………………...……… 10
6.1 Before the Breaker is Used……………….…….. 10
6.1.1 Pre-Operation Inspection…..…………………. 10
6.2 Proper Operation and Use………………….…... 10
6.2.1 Operating (Cycle) Time - Max.………………. 11
6.3 Operating Mistakes to Avoid…………………… 11
6.3.1 Recognize Changes in Pitch or Frequency.. 11
6.3.2 Do Not Pry with Breaker……………………… 12
6.3.3 Do Not Drop or Hack at the Material………… 12
6.3.4 Do Not Operate With Cylinders At Stroke End 12
6.3.5 Other Operating Mistakes to Avoid………… 13
6.4 Special Applications & Operating Conditions 13
6.4.1 Working Underwater…………………….…….. 13
6.4.2 Working Underground……………………..…… 14
6.4.3 Working in Hot Temperatures……………….... 14
6.4.4 Working in Cold Temperatures........................ 14
6.4.5 Flow Adjustment……………………..……….. 15
7.0 Care and Maintenance………………………... 16
7.1 Inspection & Maintenance Schedule…………. 16
7.2 Equipment Maintenance Log…………………... 17
7.3.1 Housing Box Inspection ……………………. 17
7.3.2 Vibration Dampening Parts Inspection….….... 17
7.4 Front Head – Description of Parts…..………..…. 18
7.4.1 Front Head Inspection…………………………. 18
7.4.2 Measure Gap Between Tool & Bushing …… 19

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Table of Contents - [cont’d]
SECTION Pg.
7.4.3 Front Head Inspection – Internal Parts……. 20
7.4.4 Tool & Bushing - Measure Wear…………… 19
7.5 Piston Inspection…………………………….. 20
7.6 High-Pressure Accumulator…………….…….. 20
7.7 Inspect Mounting Pins…………………....…… 20
7.8 Threaded Fastener Inspection………………. 20
7.9 Inspect Hoses………………………………... 20
7.10 Check Oil & Filter on Carrier…………….….. 22
7.11 Measuring Oil Pressure………………….….. 21
7.11.1 Safety Precautions – Read First………..… 21
7.11.2 How To Measure Oil Pressure…………… 22
8.0 Safe Handling & Storage……………………. 23
8.1 Transport Breaker Independently of Carrier… 23
8.2 Transport Breaker Installed on Carrier………. 23
8.3 Breaker Storage – Short Term (<14 days )… 23
8.4 Breaker Storage – Long Term (> 14 days)… 23
9.0 Breaker - Attach To /Remove From Carrier 25
9.1 Carrier Requirements………………………… 25
9.2 Mounting Kits………………………………….. 25
9.3 Tools Required to Attach the Breaker………. 25
9.4 Attach Breaker to the Carrier………..……… 25
9.5 Supply Hose IN and Return Hose OUT..…… 26
9.6 Removal from Carrier………………..…..…... 27
9.6.1 Tools Required For Removal of Breaker.… 27
10.0 Tool Removal and Installation……………. 29
10.1.1 Safety Precautions – Read First…………. 29
10.1.2 Tools Needed For Removal…….…………. 29
10.1.3 Overview of Tool Retainer System………. 29
10.1.4 Tool Removal…. ………………………...… 30
10.2 Tool Inspection & Prepare For Installation... 30
10.3.1 Install Tool – General……….……………... 30
SECTION Pg.
10.3.2 Tools Needed to Install………….…………. 31
10.3 3 How to Install Tool………………….……... 31
10.4 Tool Re-lubrication – Conventional Method 31
10.4.1 Avoid Costly Lubrication Mistakes……… 32
10.5 Tool Re-lubrication – Automatic Systems… 33
10.5.1 Tool Re-lubrication Carrier Mounted Type 33
10.5.2 Tool Re-lubrication Breaker Mounted Type 33
10.6 Benefits of Using Chisel Paste………..…… 33
11.0 Tool Selection Guide………………………. 34
11.1 Match the Application…………….………… 34
11.1.1 Methods Used to Break Up Material……… 34
11.2 Tool Working Length……………….………… 34
11.3 Tool Sharpening………………….………….. 34
12.0 Back Head & Accumulator Gas Charge… 35
12.1 Charge Tool - General Description……… 35
12.2 Safety precautions for Charging Back Head 36
12.2.1 Tools Required for Charging Back Head 36
12.2.2 Connecting the Charging Block…….….… 36
12.2.3 How to Measure Gas Charge…………..…. 36
12.2.4 How to Pre-charge the Back Head.……… 37
12.2.5 Removing the Charging Block…………….. 37
12.3 Safety precautions Charging Accumulator 37
12.3.1 Tools Required for Charging Accumulator 38
12.3.2 Connecting the Charging Block……….… 38
12.3.3 How to Measure Gas Charge…………….. 38
12.3.4 Charging the Accumulator.……………….. 38
12.3.5 Removing the Charging Block………….... 38
13.0 Troubleshooting Guide……………………. 39
14.0 Technical Information……………………… 43
14.1 Definition of Terms………………………….. 43
14.2 Testing the Hydraulic Circuit……………….. 44

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Table of Contents - [cont’d]
Section Pg.
Table 14.1 Specifications……………..………..…… 45
Table 14.2 & 3 Tightening Torque – Side Rods..… 47
Table 14.3 Tightening Torque – Mounting Bracket 47
15.0 Service Record……………………………….. 48
List of Figures
Figure Pg.
S1- Safety Alert Symbol……………………………… ii
S2- Safety Message Presentation – Typical………. Ii
L1-14: Information Labels Found On Breaker……… iv
L15-Label Positions………………………………….. iv
Pictograms Used In This Manual………………….. v
2-1 Equipment Identification………………….…….. 3
2-2 Equipment Identification Tag……………….….. 3
4-1 Main Components of Hydraulic Breaker……… 6
4-2 Cutaway View of the Breaker…………….…… 6
5-1 Auxiliary Conversion Circuit…………………….. 9
6-1 Install Window Guards………………………….. 10
6-2 Operate at 90° to Work Surface……………….. 11
6-3 Start at Outer Edge & Work Inward……………. 11
6-4 Do Not Overheat Tool….………………………. 11
6-5 Do Not Blank Fire……………………………….. 11
6-7 Do Not Pry with the Breaker……………….…… 12
6-8 Do Not Drop Breaker or Hack at the Material… 12
6-9 Do Not Operate With Cylinders At Stroke End 12
6-10 Do Not Lift or Carry Objects With Breaker……. 13
6-11 Travel With Breaker Low to Ground…………. 13
6-12 Correct and Incorrect Parking Positions…….. 13
6-13 Working Underwater Requires Modifications 13
7-1 Vibration Dampening – Buffers & Wear Plates 17
7-2 Keep Dust Plugs Installed In Housing Box …… 17
7-3 Internal Parts of Front Head……………………. 18
7-4 Measure Gap Between Tool and Bushing…… 19
Figure Pg.
7-5 Measure Tool for Wear…………………..……. 19
7-6 Measure Bushing for Wear…………...………. 19
7-7 Piston With Damage to Impact Face……….… 20
7-8 Measuring Oil Pressure……………......……… 22
8-1 Use Approved Lift Points…………..………….. 23
8-2 Improper Park Position…………………………. 23
8-3 Push Piston to Its Highest Position………….. 24
8-4 Protect Piston Against Water Damage……….. 24
8-5 Protect Breaker With Tarp………………...…… 24
9-1 Top Mounting Bracket - Typical……..……...… 25
9-2 Attach Breaker to Carrier……..……..…………. 26
9-3 Install Pins and Keepers……………………….. 26
9-4 Port Connection Markings [IN] and [OUT]…… 26
9-5 Connect Hoses to Carrier……………..………. 27
9-6 Check Hose Movement……………….………. 27
9-7 Close Shut Off Valve to Breaker………….…. 27
10-1 Tool Retainer System – HR290……….…….. 29
10-2 Tool Retainer System – HR270……………… 29
10-3 thru 10-5 Tool Removal………….…………… 31
10-6 Pre-Lube the Tool Shank……………….…… 31
10-7 Tool Lubrication – Correct Position…………. 32
10-8 Tool Seated Against Thrust Ring………….. 32
10-9 Lubricant Must Be Visible to Operator……… 32
10-10 Tool Lubrication – Incorrect Position……… 32
10-11 Carrier Mounted AutoLube.……………..…. 33
10-12 Breaker Mounted AutoLube……………..…. 33
11-1 Conical, Chisel, Blunt Tools……………….... 34
11-2 Tool Working Length………………………... 35
12-1 N2Gas Back Head..……………..….….…… 35
12-2 N2Gas Accumulator...………………….…… 35
14-1 Flow-Pressure Diagram……………….……. 43
14-2 General Dimensions – HR270….………….. 46
14-3 General Dimensions – HR290….………….. 46
14-4 Torque Locations……………………………. 47
14-5 Angle of Rotation & Tightening Sequence… 47
14-6 Fastener Torque Mounting Bracket………… 47

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1.0 Introduction and Scope
1.1 Purpose of this Manual
This manual has been prepared in support of the
Allied equipment named in Table 1.1 and is intended
to assist the operator and maintenance personnel
with the information necessary for the safe and
proper use of the Allied equipment.
1.2 About This Manual
Table 1.1 About This Manual
Document ID No. SOM577202
Type Safety, Operation and
Maintenance
Current Status See Inside Cover
Product Name: Hydraulic Impact Breaker
Series Hy-Ram
Applicable Model[s]: HR270, HR290
Years of Manufacture: 2011 & above
Material presented in this manual, including figures,
captions, tables, descriptions, remarks and
specifications may not be suitable for use with
models other than those identified in Table 1.1. Prior
to using this manual, confirm that all information
recorded on the equipment’s identification label
corresponds with Table 1.1. Figures and descriptions
may show equipment that is optional.
This document is published solely for information
purposes and should not be considered all-inclusive.
If further information is required, contact your local
Allied dealer or the Allied Customer Service
Department.
Material in this publication has been reviewed for
accuracy. Allied Construction Products, LLC has
endeavored to deliver the highest degree of accuracy
and every effort has been made to provide
information as complete as possible. However,
continuous improvement of our products is an Allied
policy.
Material in this publication, including figures,
captions, tables, descriptions, remarks and
specifications, describe the product at the time of its
printing, and may not reflect the product in the future.
When changes become necessary, these will be
noted on the inside cover.
1.3 How to Order Replacement Publications
This manual is an integral part of this product. Keep it
in a convenient location so that it is easily accessible
for future reference.
Replacement manuals can be ordered by contacting
your Allied dealer service center.
1.4 Related Publications
Allied Construction Products, LLC offers the following
publications for the product identified in Table 1.1.
1.4.1 Parts Manual
Parts Manuals identify each component of the Allied
work tool, including safety and information labels.
1.4.2 Repair Manual
The Repair Manual has been prepared to assist the
Service Technician with the information necessary for
the disassembly & reassembly of the Breaker.
Content includes:
Safety Information
Disassembly & Reassembly
Bolt Torque Specifications
Wear Limits of Parts
N2 Gas Charging Instructions
1.4.3 AEM Safety Manual for Hydraulic Mounted
Breakers
The Association of Equipment Manufacturers offers a
safety manual designed for operators and
maintenance personnel of hydraulic mounted
breakers.
The manual is available in Spanish, French and
English. It is published in an illustrated format of
sensible do's and don'ts, featuring typical daily
situations on the job site.
Content includes safety tips concerning the
workplace and equipment, start up and shut down
guidelines and special operating and maintenance
precautions.This publication is available by
contacting:
Association of Equipment Manufacturers
Toll free 1-866-AEM-0442
E-mail: [email protected]
Website: www.aem.org

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1.0 Introduction and Scope – [cont'd]
Ask for FORM CMHB-1004, Hydraulic Mounted
Breakers.
This publication is also available through Allied under
part number 953076 (English). To order a copy,
contact the Allied Customer Service Department.

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2.0 Equipment Identification
2.1 Serial Number Location
Fig 2-1 Equipment Identification
Refer to Figure 2-1. The Serial Number assigned to
this equipment can be found in the following
locations:
1. Stamped on the Equipment Identification Tag
2. Stamped on the back head near the charge plug.
2.2 Equipment Identification Tag
Fig 2-2 Equipment Identification Tag
The Equipment Identification Tag is affixed to the
housing. It provides the following information:
Manufacturer’s name
Address
Product name
Model number
Serial number
Year of manufacture
Weight
Confirm that the information contained on the Tag
corresponds with the information provided in Section
1, Table 1.1.
2.3 Record Equipment ID Information for Future
Reference
Your local Allied dealer requires complete information
about the equipment to better assist you with
questions regarding parts, warranty, operation,
maintenance, or repair.
Copy the Model and Serial Number from the
Equipment Identification Tag to the space
provided below.
Indicate the date in which the Allied equipment
was placed into service.
Fill out the Warranty Registration form and return
to Allied Construction Products, LLC.
Product Hydraulic Breaker
Series Hy-Ram
Model
Part Number:
Serial Number:
In Service Date:
Registration Date

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3.0 Warranty Protection Summary
3.1 Overview
The Allied attachment is delivered assembled,
lubricated, and factory tested. Upon receipt of the
equipment, inspect for possible shipping damage.
For every new Breaker, Allied requires that a
Warranty Registration form be completed and
returned to Allied. The form includes a section to
record information about the carrier on which the
breaker is being installed.
To keep the Allied equipment operating within its
performance limits, familiarize yourself with the
technical specifications section of this manual.
Adhere to these specifications when calibrating the
carrier. Improper installation, including failure to
calibrate the carrier correctly may result in loss of
performance or subject the equipment to conditions
beyond their design.
Use of non-Allied parts, unapproved service
methods, modifications to the attachment, or
installation, operation and maintenance, not in
accordance with the instructions outlined in this
manual may cause equipment failure or personal
injury.
For details regarding warranty terms and conditions,
refer to document 574490.
3.2 Owner’s Responsibilities
When properly installed, operated and maintained by
qualified personnel, the Allied attachment will remain
productive with a minimum of service.
The following outlines general maintenance policies
required for all breaker models. The equipment
owner is strongly encouraged to adopt these general
guidelines and further develop them in order to
manage particular applications and operating
environments.
Ensure that personnel entrusted with installation,
operation, maintenance and transporting of the Allied
equipment adhere to the following:
Read and thoroughly understand the information
and procedures detailed in this manual.
Understand proper operating techniques for all
recommended applications.
Use the Allied attachment only if it is in sound
operating condition. Take prompt action to rectify
any faults that, if left uncorrected, could lead to
personal injury or further damage.
Use the Allied attachment only for the purpose for
which it is intended.
Understand that particular applications, such as
working underwater, will require modifications to
the standard breaker and additional training for
operation and service.
Appoint Who Does What. Ensure that all
personnel understand what their specific
responsibilities include.
1. Establish maintenance responsibilities to
be performed by the OPERATOR.
2. Establish maintenance responsibilities to
be performed by the SERVICE
TECHNICIAN.
Recognize problems and know how to take
corrective action as detailed in Troubleshooting
Section 13.
Conduct regular checks and inspections as
scheduled in the Care and Maintenance Section
7.
Allow only qualified operators and Allied trained
service technicians to perform maintenance and
repair as specified in the care and maintenance
schedule.
Use only genuine Allied replacement parts and
recommended lubricants to protect total warranty
coverage.
Maintain written records of equipment
maintenance, service and repair. These records
are helpful if warranty coverage is ever in
question.
Each record shall include at least:
Date of service, maintenance or repair.
Description of the service, maintenance or repair
performed. Include part numbers if applicable.
Copies of purchase order(s) and invoice(s) for
repair parts and service.
The name and signature of the person
performing the service, maintenance or repair.

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3.0 Warranty Protection Summary – [cont'd]
3.3 Allied Product Policies
In this manual, Allied recommends breaker
applications, maintenance and service consistent
with industry practices.
Allied assumes no responsibility for the results of
actions not recommended in this manual and
specifically the results of:
Improper Training
Improper Installation
Operation in unapproved applications
Incorrect operation
Improper maintenance
Use of non-genuine Allied replacement parts
Unapproved modifications
These exclusions apply to damage to the Allied
equipment, associated equipment and injury to
personnel.

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4.0 Product Information
4.1 Description and Use
The Allied Breaker is a hydraulic powered impact
breaker designed for mounting on mobile equipment
with hydraulic booms, such as rubber tired or track-
type construction vehicles.
The breaker is suited for many types of construction
and mining applications including -
Clearance Work: Demolition of buildings, bridges,
reinforced foundations etc.
Trenching: Breaking trenches out of rocky and
frozen ground.
Mining and Quarrying Applications: Demolishing
and leveling quarry rock, breaking oversized
minerals and other rock-like raw materials.
Excavation of rock from trenches, foundations
and tunneling.
Underwater: Demolition and deepening of
shipping channels. (Requires special modification
for underwater use!)
Recycling: Breakup of "skulls" from the steel
industry.
4.2 Familiarization of Main Components
Fig 4-1 Main Components of Hydraulic Breaker
4.3 Principle of Operation
Fig 4-2 Cutaway View of Breaker Assembly
The Breaker is not self-powered. Performance
relies on a capable host machine that's equipped
with a hydraulic circuit. Within the hydraulic
circuit, an ON/OFF valve is used to control flow in
one direction to the Breaker. The valve will be
managed with a momentary switch located inside
the operator’s cab within easy reach of the
operator.
With the valve ON, supply oil from the host
machine flows to the [IN] port on the breaker. Oil
is blocked from entering the breaker unless
sufficient contact pressure is applied on the tool
to push the piston up and out of the brake
position.
Located on the breaker is the operating valve. Oil
is directed by this valve to the lower end of the
cylinder. The first half of the cycle begins when
oil, under pressure, raises the piston. As the
piston strokes upwards, oil in the upper cylinder
is expelled through the [OUT] port and returned
back to the machine.
A gas-charged accumulator is equipped on larger
breakers. Inside this self-contained pressure
vessel is a pair of expansible chambers divided
by an elastic membrane. The top chamber is pre-
charged with nitrogen gas (N2). The bottom
chamber will receive, store and discharge
pressurized oil.
The chamber inside the Back Head is also filled
with nitrogen gas (N2). The pre-charged gas is
compressed to a higher pressure as the piston is
pushed into the back head.

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4.0 Product Information – [cont'd]
As the piston nears the top of its stroke, signal
ports inside the cylinder become pressurized and
shift the operating valve closed. Blocked from
exiting the [OUT] port, the oil in the upper end of
the cylinder becomes pressurized.
With the piston at the top of its stroke, the final
half of the cycle will begin. The force of the
pressurized oil combines with the charge
pressure inside the back head and drives the
piston down. The cycle is completed when the
piston impacts the tool.
The cycle is continuous without interruption until
the machine operator releases the momentary
switch controlling the ON/OFF valve.

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5.0 Sizing The Breaker
5.1 Breaker Selection - General
When selecting a breaker, key points to consider
include –
Production rate (Material strength)
Lifting capacity of machine
Hydraulic power of machine
The size of the breaker is typically dictated by the job
requirements, but the size must also be compatible
with the carrier on which it will be mounted.
For optimum productivity, match the size of the
breaker to the job. Materials are fractured by two
methods – Penetrative and Impact. With penetrative
breaking, blows from the piston drive the tool into the
material and wedge it apart. With impact breaking,
blows from the piston generate a compressive force
that squeezes the material. When the material's
strength is exceeded, it fractures.
Be careful not to undersize the breaker in hard
material. It's important that the material absorb all of
the energy (mechanical stress wave). Problems arise
when these undesirable waves of energy are
reflected back into the breaker.
Ideally, it should take 3- 5 seconds to fracture the
material. When working in extremely hard materials,
undersized breakers will be subjected to longer
running cycles. This negatively impacts production,
component longevity and reliability. Continuous
running beyond 15 seconds will generate unwanted
heat at the tip of the tool. Attention to wear parts,
such as bushings and tools, will need to be more
frequent. The machine’s service intervals will also
require extra attention.
Reaching optimal production rates requires efficient
interaction between the operator and machine. A
machine that is undersized will force the operator to
work at a slower pace to keep the machine stable. An
undersized machine also reduces the size of the
material it can shuffle when repositioning materials.
Allied breakers are assigned a recommended carrier
weight range. On a general level, if the breaker falls
within this range, it's regarded as a good match.
To ensure the carrier can safely handle the weight of
the breaker, always consult the specifications in the
manual provided by the carrier manufacturer. Factors
such as boom and stick length, undercarriage and
tracks, counterweights, etc., all affect the lifting
capacity of the carrier. Check the machine for any
modifications and also take into account any add-ons
such as a quick attach coupler.
Next, review the hydraulic specifications of the carrier
and breaker. All hydraulic breakers are designed to
provide optimum performance with reliable service
life at a specific oil pressure and flow range. For a
combination to be successful, the circuit must be in
good working condition and able to deliver adequate
flow and pressure with minimal heat generation and
power loss.
Before the breaker is used, complete a performance
evaluation of the hydraulic circuit. These test results
will confirm if the hydraulic circuit is calibrated and set
in accordance to the specifications of the breaker.
Tools required for testing the oil flow, operating
pressure and back pressure include a flow meter and
pressure gages. An overview of the testing
procedure, along with a form to record the results of
the flow test, can be found in the Technical Data
section in this manual. Compare test results with the
specifications of the breaker. Make all necessary
adjustments.
5.2 Auxiliary Circuit and Conversion Kits
CAUTION
Equipment damage from improper oil
flow or pressure. Accurate calibration
of the hydraulic circuit is important for
reliable operation.
Hydraulic circuits differ between machines. Only
qualified personnel, having knowledge of the
machine’s systems, proper test equipment and tools
should perform conversion set-up and adjustments.
Work tools, such as Breakers, are not self-powered.
Their performance is reliant upon the hydraulic power
of the host machine. The hydraulic power it provides
to the breaker must meet all of the requirements
specified in the technical data section of this manual.
Most machines will require some degree of
conversion to make use of their hydraulic power. A
hydraulic circuit, capable of producing flow and
pressure in one direction is needed to operate a
breaker.

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5.0 Breaker Selection – [cont’d]
Conversions to machines equipped with a factory or
dealer installed auxiliary circuit may require little more
than minor adjustments to flow and pressure settings.
Follow the machine manufacturer’s instructions when
making any adjustments.
If the machine is not equipped with a hydraulic circuit,
a conversion kit, from Allied, can be installed. When
necessary, Allied conversion kits include the Allied
"AC" series valves. These are solenoid-operated
valves that control flow and pressure.
Fig 5-1 Allied Conversion Kit With AC-Series Valve
The process of selecting the right breaker must
consider the type of work to be done. This includes
any special needs such as required modifications
when working in underwater applications
Requests for further information or assistance with
breaker selection should be directed to your Allied
dealer or by contacting the Allied Sales or Product /
Technical Support Departments.