Hitachi H90SB User Manual

Demolition Hammer
Model H 90SB

Handling instructions

Double insulation

Note:

Before using this HITACHI Demolition Hammer, carefully read
through these HANDLING INSTRUCTIONS to ensure efficient, safe
operation. It is recommended that these HANDLING
INSTRUCTIONS be kept readily available as an important reference
when using this power tool.

We sincerely thank you for selecting a HITACHI POWER TOOL. To operate this power tool
safely and efficiently, please read this INSTRUCTION MANUAL carefully to get a good
understanding of the precautions in operation, capacity of the power tool, use and the like.

GENERAL OPERATONAL PRECAUTIONS

1. KEEP WORK AREA CLEAN. Cluttered areas and benches invite injuries.

2. CONSIDER WORK AREA ENVIRONMENT.

Don’t expose power tools to rain.
Don’t use power tools in damp or wet locations.
Keep work area well lit.
Don’t use the power tool in presence of flammable liquids or gases.
Power tools produce sparks during operation. They also spark when switching ON/
OFF. Never use power tools in dangerous sites containing lacquer, paint, benzine,
thinner, gasoline, gases, adhesive agents, and other materials which are combustible
or explosive.

3. GUARD AGAINST ELECTRIC SHOCK. Prevent body contact with grounded surfaces.

For example: pipes, radiators, ranges refrigerator enclosures.

4. KEEP VISITORS OR CHILDREN AWAY. Do not let visitors or children contact the power

tool or extension cord. All visitors or children should be kept away from work area.

5. STORE IDLE POWER TOOLS. When not in use, power tools should be stored in dry,

and high or locked-up place-out of reach of children.

6. DON’T FORCE THE POWER TOOL. It will do the job better and safer at the rate for

which it was intended.

7. USE RIGHT POWER TOOLS. Don’t force a small power tool or attachment to do the job

of a heavy-duty tool. Don’t use the power tool for purpose not intended - for example ­don’t use circular saw for cutting tree limbs or logs.

8. DRESS PROPERLY. Do not wear loose clothes or accessories. They can be caught in

moving parts.
Rubber gloves and non-skid footwear are recommended when working outdoors.
Wear protective hair covering to contain long hair.

9. USE SAFETY GLASSES. All persons in the area where power tools are being operated

should also wear safety eye protectors, and face or dust masks if cutting operation is
dusty.

10. DON’T ABUSE CORD. Never carry power tools by cord or yank the cord to disconnect

the power tool from receptacle. Keep the cord from heat, oil and sharp edges.

11. DON’T OVERREACH. Keep proper footing and balance at all times.

12. MAINTAIN POWER TOOLS WITH CARE. Keep power tools sharp and clean for better

and safer performance.
Follow instructions for lubricating and changing accessories.
Inspect tool cords periodically and if damaged, have repaired by the authorized service
center.
Inspect extension cords periodically and replace them if damaged.
Keep handles dry, clean, and free from oil and grease.

13. DISCONNECT POWER TOOLS. When not in use, before servicing, and when changing

accessories, such as blades, bits, cutters.

14. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to see that keys

and adjusting wrenches are removed from the power tool before turning it on.

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15. AVOID UNINTENTIONAL STARTING. Don’t carry a plugged-in the power tool with finger

on switch. Be sure switch is off when plugging in.

16. OUTDOOR USE EXTENSION CORDS. When the power tool is used outdoors, use only

extension cords intended for use outdoors and so marked.

17. STAY ALERT. Watch what you are doing. Use common sense. Do not operate the power

tool when you are tired.

18. CHECK DAMAGED PARTS. Before use of the power tool, a guard or other part should

be carefully checked to determine that it will operate properly and perform its intended
function. Check the alignment of moving parts, binding of moving parts, breakage of
parts, mounting, and any other conditions that may affect its operation. A guard or
other part that is damaged should be properly repaired or replaced by an authorized
service center unless otherwise indicated elsewhere in this instruction manual.
Have defective switches replaced by an authorized service center.
Do not use the power tool if switch does not turn it on and off.

19. Do not use the power tool for applications other than those specified in the Handling

Instructions.

20. To ensure the designed operational integrity of the power tool, do not remove installed

covers or screws.

21. Do not touch movable parts or accessories unless the power source has been

disconnected.

22. Use your power tool at lower input than specified on the nameplate; otherwise, the

finish may be spoiled and working efficiency reduced due to motor overload.

23. DO NOT WIPE PLASTIC PARTS WITH SOLVENT. Solvent such as gasolin, thinner,

benzine, carbon tetrachloride, alcohol, ammonia and oil containing chloric annex
damage and crack plastic parts. Do not wipe them with such solvents. Wipe plastic
parts with a soft cloth lightly dampened with soapy water.

24. Consult an authorized service center in the event of the power tool failure.

25. Use only original HITACHI replacement parts.

26. This power tool should only be disassembled for replacement of carbon brushes.

SERVICE AND REPAIRS

All quality tools will eventually require servicing or replacement of parts due to wear from
normal use. These operations should ONLY be performed by an authorized service center.

DOUBLE INSULATION SYSTEM ENHANCES SAFE OPERATION

To enhance safe operation of this electric power tool, HITACHI has adopted a double
insulation system. The term “double insulation” used here denotes an insulation system
with two insulations physically separated and arranged between the electrically conductive
material connected to the power supply and the outer frame subject to contact by the
operator.
Thus, the power tool is termed double insulated and both the “ ”
mark and “Double insulation”, or either one is indicated on the name
plate.
While no external grounding is required with this system, normal safety
precautions as outlined in this manual must still be followed.

DOUBLE INSULATION

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To maintain the effectiveness of the double insulation system, follow the precautions
described below:

1. Always contact your dealer or an authorized service center when assembling,
disassembling or replacing parts other than accessories or carbon brushes. Improper
assembly and/or replacement with wrong parts may result in eliminating the double
insulation-feature.

2. Clean the exterior of the power tool with a soft cloth moistened with soapy water, and
dry thoroughly. Chloric solvent, gasoline, and thinner will cause plastic components to
dissolve.

REPLACEMENT PARTS

When servicing use only identical replacement parts.

PARTICULAR PRECAUTIONS ON USING DEMOLITION HAMMER

In addition to the precautions mentioned above, following particular precautions for this
Demolition Hammer should be followed.

1. Wear earplugs to protect your ears during operation.

2. Do not touch the bit during or immediately after operation. The bit becomes very hot
during operation and could cause serious burns.

3. Before starting to break, chip or drill into a wall, floor or ceiling, thoroughly confirm
that such items as electric cables or conduits are not buried inside.

NAME OF PARTS

Handle

Switch trigger

Tail cover

Front cover

Housing

Retainer

NOTE:

Install the side handle with the supplied 4 bolts and 4 spring lock washers. Tighten the
bolts securely with the supplied wrench.

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Side handle

Fig. 1

Name plate

Bolt, Spring lock washer
(M8 x 30)

Hexagon socket
hd. bolt (M5 x 10)

Housing cover