Keyang KH-42HA User manual

KH-42HA
KH-42MA
KH-6500
2004.07
823-2 Wonsi-dong, Ansan-shi, Kyouggi-do, KOREA
Tel : Int+82-31-490-3000 Fax : Int+82-31-490-3019
ELECTRIC HAMMER
www.keyang.com
MANUAL
Please read this manual to the last
for safe and efficient operating
before using, keep well in place
can find easily.
품질보증서 재중
KH-42HA󱅏
KH-42MA󱅏
KH-6500

2 3
We, Keyang Electric
Machinery Co., Ltd., would
like to express our sincerest
gratitude to you who always use
our power tools.
You must read carefully this
“instruction manual”before use
the tool for safe and effective
operation.
1. Caution for safety ······························3
2. Check Before Use ······························7
3. Product Specifications and Standard Accessories ··9
4. Name and Use of Each Part·····················10
5. How to install, remove and operate ··············11
6. How to Change Grease and Supply Oil ··········13
7. Repair and Maintenance ·······················15
【Note】
As our engineers are striving for the constant research and
development to develop the quality of products,shape or structure
of our model can be changed without previous notice.
Table of Contents
Safety Rules
GENERAL SAFETY INSTRUCTIONS
1. Keep your work area in order.
Distractions in the work area and workbench may cause accidents.
2. Consider your work environment.
Do not expose power tools to rain and other forms of moisture.
Keep your work area well lit.
Do not operate power tools in explosive atmospheres, such as in the presence of
flammable liquids or gases.
3. Beware of electric shocks.
Avoid body contact with grounded surfaces such as water pipes, heaters, ranges and
refrigerators.
4. Keep children away while operating a power tool.
Keep children away from a power tool or extension cord.
Keep visitors away from your work area.
5. Keep your tools in a safe place, away from your children.
Keep your tools in a dry and locked place out of the reach of children.
6. Do not plug power tools into overloaded electric circuits.
Using power tools with the specified electric output will allow for their safer and more
effective operation.
7. Always use the proper tools.
Do not use weak tools or parts for high strength work.
Use the correct tool for your application.
For example: do not use a circular saw to fell or prune trees.
8. Dress properly.
Do not wear loose clothing or jewelry. Loose clothes, and jewelry or long hair may be
caught in moving tool parts. Non-skid safety shoes must be used for outdoor operation
of power tools.
9. Always wear safety goggles.
Use a dust mask or a face mask for applications that generate dust.
10. Do not abuse the cord.
Never use the cord to carry tools or to pull a plug from an outlet. Keep the cord away
from heat, oil, and sharp edges.
11. Fix your working materials.
Fix your working materials with a clamp or a vice, rather than by hand. This is safer
and lets you operate your work materials with both hands.
1

54
Special safety instruction
This sign means that you must caution for the danger occurred in the special condition.
Warning
■Do not supply water during use.
When water gets into a motor, you can be killed by an electric shock.
■Do not use the wet tools or in the rain.
You can be killed by an electric shock or injured seriously.
■Do not make your fingers and hands touch with the bull point during
operation.
When your fingers and hands are touched with the bull point or caught in it, you
may be injured seriously.
■Set the bull point not to be come out.
When the bull point is come out suddenly during the operation, other people near
the working place can be injured.
■Make sure the tool is earthed before use.
When the tool is not earthed, you may be injured by an electric shock.
■Make sure the switch is off before you plug in the electric cord.
When you plug in the power source with the tool switched on, you may be injured
seriously by sudden rotation of bull point.
■Always wear the safety goggle during operation.
Your eyes may be hurt seriously by crushing power.
■You must wear the dust mask.
Dust occurred during the operation can injure your health.
The instructions in this user’s guide include critical information for safe
use. When you do not keep the instructions, you may cause death, serious
injury and property damage.
For safe use,‘warning’and‘caution’are represented in the instructions
under the degree of danger as follows.
Caution is represented to prevent the accident might be occurred during use and handling of the
power tool. As warning and caution cannot cover all possible situations, you must be careful
while using or keeping of the tool. Please read through the instructions to prevent any accident.
Warning
In case where is high possibility of
occurrence of serious injury or death
accident if directed matter is violated.
Caution
In case where is possibility of
occurrence of serious injury or death
accident if directed matter is violated.
Caution
In case where is possibility of occurrence of
either trouble failure not to be able to use
product or performance deterioration if
directed matter is violated.
12. Do not overreach.
Keep proper footing and balance at all times.
13. Maintain your tools with care.
Keep your tools clean and sharp so that you will be able to work with them efficiently
and safely.
Follow maintenance rules and replacement instructions.
Periodically examine your tool’s plugs and cords. They must be serviced only by
qualified repair personnel.
Periodically examine extension cords, and replace damaged ones promptly.
Keep the handles of your power tools dry and free from oil or grease.
14. Keep electric plug pulled off.
Always pull off your tools’ electric plugs from their power supply before making any
adjustments on them, before changing their accessories, (such as drills, blades, bits,
and cutters), or before storing them.
15. Remove adjusting keys.
Check to see that keys and adjusting wrenches have been removed from your tools
before you switch them“ON”.
16. Avoid accidental starting.
Carrying tools with your finger on the switch or plugging in tools with their switches
“ON”may cause them to accidentsally start.
Before plugging in a tool, make sure the switch is“OFF”.
17. Use an outdoor extension cord when operating tools outdoors.
When operating a power tool outdoors, use an outdoor extension cord rated for outdoor
use.
18. Stay alert.
Watch what you are doing and use common sense when operating a power tool.
Do not use a power tool when you are having difficulty in concentrating on your work.
19. Check your tools before using them.
Make sure your tools’ safety devices and running parts are functioning well and that
the latter are not caught in anything before you use them. Correct assembly is
necessary for perfect operation. If a safety device or part is damaged, have it serviced
at a Keyang Service Center. Do not use a tool when its switch is not functioning.
20. Exercise caution!.
Use only parts and accessories that are recommended by your tools’ manufacturers or
that are specified in your tools’ manuals. Using parts and accessories that are not
specified in your manuals or catalogues may cause injuries.
21. Have your tools serviced only by qualified repair personnel.
Follow safety rules when operating power tools. Only qualified electrical repair
personnel must service tools. Service or maintenance performed by unqualified
personnel may cause accidents.

76
Caution
■Hold tightly the tool with both hands during operation.
When you drop the tool, it may cause serious injury.
■Use the nationally certified bull point for specified use.
When you do not follow the instructions, you may experience the malfunction of the
tool or serious injury.
■Remove the plug from power source when change oil or grease.
When you are mistake, it may cause serious injury.
■Wear earplugs to protect your sense of hearing.
밀폐된 장소에서 작업을 할 경우 소음의 정도가 증폭될 수있습니다.
Caution
■Use the shortest extension cord.
When the extension cord is too long or thin, the voltage drop will be higher. In
result, the power of motor will be decreased.
■Make a trial run before the operation.
Check the tool by a trial run with the bull point faced the place no man there.
■Fill up oil for the oil lubrication system tool (KH-6500).
The oil lubrication system tool (KH-6500) consumes oil. When you use the tool
without oil, it may cause a trouble of the tool.
■You must change grease in six months for the grease lubrication
system tool (KH-42HA,KH-42MA).
You must change grease in six months.
When the function of lubrication is decreased, it causes the trouble of the tool.
■Change grease at A/S centers (agencies) authorized by Keyang Electric
Machinery Co., Ltd.
When you assemble the tool incorrectly after changing of grease, you may
experience the trouble of the tool.
You must change at A/S centers(agencies) authorized by Keyang Electric
Machinery Co., Ltd.
Make sure the leakage circuit breaker is in the power source of the electric hammer.
When you use the tool in the power source without the leakage circuit breaker of the current
operating mode in below 15mA of the rated sensitivity current and 0.1 second of the
operating time, please earth the tool.(Double insulation product needs no grounding.)
• When you use the earth clip for earth, make sure the position between the earth clip and
external metal case of the power tool is live.
1. The leakage circuit breaker
When the power source is located in the distance,
you may use the extension cord. However, you
should use the extension cord with proper length
and thickness not to prohibit the current. When you
use too long or thin extension cord, the voltage drop
will be higher. In result, the power of the motor will
be decreased. Please use the shortest extension cord.
2. The extension cord
Make sure the working place has proper working environment referring to the caution.
3. The working environment
When the extension cord is damaged, you must change or repair it immediately.
When there is no leakage circuit breaker, use 3-core cable.
Check Before Use
Nominal cross
section of
conductor
Nominal cross
section of
conductor
0.75 mm220 m 0.75 mm240 m
1.25 mm230 m 1.25 mm260 m
2 mm250 m 2 mm2100 m
110 V 220 V
Max.
length Max. length

9
8
You must use the tool in the power source specified in the nameplate. When you use the tool
for 110 V in 220 V, the speed of the motor will be increased abnormally. In result, the drill
bit and the tool can be damaged.
4. The power source
Make sure the switch lever is returned to its original position by pushing or pulling it.
5. The switch
When you plug in the power source with the tool switched on, you may be
injured seriously by sudden rotating of the tool.
When you use the tool for 110V in 220V, the motor can be damaged by a fire.
Product Specifications and Standard Accessories
Power source
Motor
Power input (W)
No Load BPM
Weight (Excl. cord)
KH-42HA KH-42MA KH-6500
Single phase AC 50/60 Hz
110V~ /120V~ /220V~ /230V~ /240V~
Single phase series commutator series motor
1050 1300
3500 /min 1450 /min
5.8kg 5.5 kg 15 kg
Grease lubrication Oil lubrication
Model
Items
Standard accessories
Product specifications
Iron box
Plastic box
Side handle
Bull point
Grease tube
Spanner
Carbon brush
Hexagon L wrench
(For 5mm screw)
Hexagon L wrench
(For 6mm screw)
KH-42HA
─
󱅛
󱅛
󱅛(Hexagon)
󱅛
─
─
─
󱅛
KH-42MA
─
󱅛
󱅛
󱅛 (SDS-MAX Shank)
󱅛
─
─
─
󱅛
KH-6500
󱅛
─
󱅛
󱅛
─
󱅛
󱅛
󱅛
󱅛
Name
Lubrication system
(Hammer mechanism)
Specifications and standard accessories may differ from country to country.

1110
Name and Use of Each Part
󱅙For crushing of concrete.
󱅙For tamping, grooving, cutting, removing, squaring, grooving in a gravel road.
[Examples]
Heating & cooling work, pipe, wiring work, sanitary facilities work, installation of machinery, supply &
drainage works, interior decoration work, harbor facilities work and other engineering facilities works.
2. Use
1. Name of each parts
How to install, remove and operate
SwitchSide handle
Front cover
Name plate Cap cover
Bull point
Front cover set screw
Stopper lever
Grease cover Switch
Switch
Grease cover
Handle
Retainer
Retainer
Side handle
Safety cover
Handle
Selector
Side handle
Safety cover
Alawys be sure that the tool is switched off and unplugged before installing or
removing the bit.
•KH-42HA•
•KH-42MA•
•KH-6500•
1. Installing and removing bull
1) KH-42HA, KH-42MA
KH-42MA is suitable for insert tools with SDS-MAX shank. KH-42HA has the tool
holder system of hexagon.
Before installing the bit, clean the bit shank and apply the bit grease provided to it.
Installing
Insert the bit into tool holder with rotating it. After installing, always make sure that the
bit is securely held in place by trying to pull it out.
Removing
Pull the retainer in the direction of the arraw(illustrated), and pull the bit out.
2) KH-6500
(1) Pull the stopper lever in the direction of the arrow mark(B)
(2) Turn the stopper lever a full 180 degrees to set the bull point.
(3) Insert the bull point in the direction of the arrow mark(A) into the front cover.
(4) Pull and turn the stopper lever a full 180 degrees in its original position.
(A)
(B)
Stopper lever
Front cover
Removing
Installing
Retainer

2. How to operate
Make the edge of the bull point face the position to be
crushed, and operate using the weight of the tool. You do
not have to apply pressure too much on the tool.
3. Rotating and locking the chisel bit(KH-42MA)
The bit can be secured at 12 different angles. To change the bit angle, pull the selector
cover forward, then rotate the selector cover to change the bit angle.
At the desired angle, pull the selector cover backward to the original position.
Then rotate the selector cover slightly and lock it to the tool.
12 13
After operation, you must turn off the switch and
remove the plug from the plug socket.
How to Change Grease and Supply Oil
1. How to change grease (Model: KH-42HA, KH-42MA)
As this tool is made in a complete closed structure, it prevents permeation of
dust and leakage of lubricating oil. Thus, it can be used for a long time without supplying of
grease.
●Time for changing of grease
(1) Change grease every 6 months after purchasing the product.
(2) Change grease at the below places.
Main office of Keyang Electric Machinery Co., Ltd.
Agencies of Keyang Electric Machinery Co., Ltd.
A/S centers authorized by Keyang Electric Machinery Co., Ltd.
If necessary, change grease for yourself as below.
●How to change grease
(1) Remove the grease cover, and then mop up grease in
the tool with cloth.
(2) And then, supply 30g of grease for Keyang hammer
drill, which is in the tube of special parts and 2/3 of the
contents in the tube (50g).
(3) Install the grease cover after changing of grease.
During changing of grease, you must switch off and remove the plug from the
power source.
•Do not supply too much grease. Too much grease causes bad impact.
•As grease for Keyang hammer drill is the special grease in low
viscosity, please use only grease for Keyang hammer drill.
•Purchase grease at agencies, shops, A/S centers authorized by
Keyang Electric Machinery Co., Ltd.
Rotating
Locking
Selector cover

14
1. Tool (Bull point)
When you use the worn bull point, it causes a burden on the motor. In result, the work
efficiency may be decreased. You must grind or change the bull point immediately.
2. Screws
Make sure screws in each part are set tightly at regular intervals. When screws are loose,
fasten them tightly.
3. Carbon brush
Disposable carbon brush is used in the motor. The
heavily worn carbon brush causes the trouble of the
motor.
When the length of the carbon brush is reached at
the wear tolerance line, change it with new carbon
brush.
Also, keep the carbon brush clean to be moved in
the brush holder freely.
4. Motor
The winding and commutator in the motor are the core of the hammer drill.
Do not scratch the surface of the winding and commutator in the motor, and do not apply oil
or water on it.
5. Keep after use
6. Abnormal operation
It is very dangerous for customers to troubleshoot or repair the tool for themselves. Contact
nearby A/S center (agencies) for solution.
Repair and Maintenance
15
2. How to supply oil (Model: KH-6500)
As the tool has the inside oiling tank, you can use it for 20 days without additional oil
supply (3~4 hours consecutive use a day). Supply oil in the oiling tank as follows.
(1) Supply oil before you cannot see oil in the raised oil gauge glass.
(2) Loosen the oil gauge with the spanner to supply oil. You should pay attention not
to lose the rubber packing in the below of the oil gauge.
(3) Make sure there is enough oil in the tool before use once a day.
(4) Fasten the oil gauge tightly after oil supply.
During oil supply, you must switch off and remove the plug from the power source.
You must keep the tool out of reach of children in dry place.
Oil gauge
3mm
Raise the oil gauge. When the surface
of oil is about 3mm, please supply oil.
Oil for Keyang hammer
is sold separately as
special parts. You can
purchase Rottella Oil
#40 in petroleum class
of Shell (Engine oil)
nearby gasoline shop.
You must purchase the genuine parts in A/S centers authorized by Keyang
Electric Machinery Co., Ltd. for change. When you use the carbon brush
other than the genuine parts, the commutator may be worn rapidly. In result,
the life of the tool can be shortened.
Wear tolerance line Carbon brush