Maruzen BH112 User manual

FOR THE SAFETY PURPOSE, PLEASE READ THIS MANUAL THROUGHLY
BEFORE ATTEMPTING TO USE THIS BREAKER. ANY FALES
OPERATING PROCEDURES WILL CAUSE DAMAGES OF THE MACHINE.
ALWAYS KEEP THIS MANUAL TO AN EASILY ACCESSABLE PLACE.
HYDRAULIC HANDHELD BREAKER
MODEL BH112
OPERATING MANUAL
MARUZEN KOGYO CO., LTD.
CAUTION
(Revised March 30, 2017)

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FOREWORD
This manual is an important part of your equipment. It provides
rules and guidelines which will help you use this machine safely and
effectively. You MUST familiarize yourself with the functions and
operations by reading the manual thoroughly before you begin using
this machine. For your safety, it is especially important that you
read and observe all precautions in this manual and on the machine.
The precautions MUST be followed strictly at all times when
performing operation and maintenance. * Fail to follow the
guidelines and safety alerts in the manuals and on the machine, or
use this machine in alternative ways from the manuals may result in
system failure or serious personal injury.
Keep this manual with the equipment or in an easily accessible place
in all times for future reference. Make sure all personnel involved in
working on this machine can consult it periodically. In case this
manual should be lost or damaged, immediately contact us or your
dealer to purchase a new copy.
We recommend you always use Maruzen genuine components and
parts. Replacing components and parts from other sources may cause
damages to this machine and endanger operators.
MARUZEN KOGYO CO., LTD.
155-8 NAGABUSE, MISHIMA-SHI,
SHIZUOKA-KEN, 411-0824, JAPAN

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CONTENTS
Safety Information .............................................................. 4 ～ 7
Safety Alert Classifications ........................................... 4
Safety Alerts .................................................................. 5 ～ 7
Introductions ....................................................................... 8
Specifications & Descriptions ............................................. 9
Precaution Labels and Positions ........................................ 10
Inspection before Each Operation ...................................... 11
Guidelines ........................................................................... 12 ～ 13
Operation............................................................................. 13 ～ 14
Daily Check Out .................................................................. 15
Periodically Inspection ....................................................... 15
Installation of Side Handle................................................. 15
Troubleshooting ................................................................... 16～ 17
Exploded View I .................................................................. 18
Parts List ............................................................................. 19 ～ 20

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SAFETY INFORMATION
To enable you to use this machine safely, safety precautions and labels
are given in this manual and affixed to the machine to give
explanations of situations involving potential hazards and of the
methods of avoiding such situations.
SAFETY ALERT CLASSIFICATIONS
The following safety alert symbols are used to inform you that there is
a potential hazardous situation that may lead to personal injury or
damage.
In this manual and on machines labels, the following safety alert
symbol are used to express the potential level of hazard.
** Safety alert symbols are to emphasize all operation which, if not
strictly followed, could result in a life-threatening situation, bodily
injury or damage to equipment.
DANGER
Indicates an imminently hazardous situation
which, if not avoided, could result in death or
serious injury.
WARNING
Indicates a potentially hazardous situation
which, if not avoided, could result in death or
serious injury.
CAUTION
Indicates a potentially hazardous situation which,
if not avoided, could result in minor or moderate
injury.

5
DO NOT OPERATE THE MACHINE UNLESS THE FOLLOWING SAFETY
INSTRUCTIONS HAVE BEEN THOROUGHLY READ AND UNDERSTOOD!
Do not operate the equipment if you are
or if your
1. taking medication, feeling drowsy, feeling unwell or feeling
tired.
2. under the influence of drugs or alcohol.
3. hands, feet, lower back or other parts of your body hurt or
being injured.
* Failure to observe this precaution can result serious injury or
even death.
WARNING
WARNING Before operating the equipment, be
sure to ware personal protective
equipments such as follows:
1. Helmet
2. Protective goggles
3. Protective boots
4. Safety gloves
5. Hearing Protection
SAFETY ALERTS

6
CAUTION Do not touch the machine with your bare
hands
1. The oil tank may become hot under continuous running
.
Do not touch the equipment with your bare hands.
2. Tools may become hot under continuous use, make sure
to ware gloves before any contact with the tools.
* Failure to observe this precaution can result getting
burned
CAUTION When lending someone the equipment
Make sure the safety instructions have been thoroughly
read and fully understood by the person who is going to use
the equipment.
WARNING Avoid Blank Hammering
Operating the equipment horizontally may cause the
chisel’s sudden flying out.
Excessive blank hammering may be considered
equipment abuse and may cause equipment damage.
Failure to observe this precaution can result damage to
the breaker.

7
WARNING Never operate the breaker when
bystanders are in the work area
1. Do not operate the breaker if any people are within
the area where flying debris or movement of the
breaker may injure them.
2. For preventing flying debris, make sure protection
fences are being set up.
Failure to observe this precaution can result personal
injury.
WARNING Be special cautions to high pressure
gas
1. High pressure gas was held inside the accumulator of
the breaker.
2. Do not loosen the nut unless it is necessary for
maintenance.
Failure to observe this precaution can result serious injury

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INTRODUCTION
1. This hydraulic breaker is designed to be used for the following
purposes.
(1) Breaking concrete and asphalt
(2) Anchoring and pile driving
(3) Digging or breaking hard soil
(4) Compacting soil
(5) Cutting asphalt
2. DO NOT operate this breaker on the following situations:
(1) Drench part of the breaker or whole breaker into water or
seawater.
(2) Connect with power source which its oil flow and pressure exceeds
the range prescribed.
(3) Operating with oil temperature below 10℃ or over 100℃.
(4) use tool which its shank size is different from prescribed
(5) Attach to other construction machinery.
(6) Use the equipment for purposes other than stated in this manual.

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SPECIFICATIONS & DESCRIPTIONS
Overall Weight 11kg (Without tool)
Overall Dimensions 566mm X 156mm
Working Pressure 90～130kgf/㎠
(8.8～12.7Mpa)
Max. Pressure 210kgf/㎠
(20.6MPa)
Oil Flow Blow per Minute
(1)10～12l/min….1300bpm
(2)12～151/min….1500bpm
(3)15～201/min….1700bpm
(4)20～251/min….2200bpm
Shank Size Hex. 22mm X 83mm
Coupling 3/8” Couplers
Max. Hose Length 1/2” X 10m
Optional Side Handle
Control Lever
(Standard)
Handle
Accumulator
Standard Hoses
Coupler
(Male)
Coupler (Female)
Tool
Side Handle

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PRECAUTION LABELS AND POSITIONS
* Make sure labels are legible. Replace new
one when they are illegible.