Hitachi C 7YA User manual

DOUBLE INSULATION

DOUBLE ISOLATION

AISLAMIENTO DOBLE

INSTRUCTION MANUAL AND SAFETY INSTRUCTIONS

WARNING

Improper and unsafe use of this power tool can result in death or serious bodily

injury!

This manual contains important information about product safety. Please read

and understand this manual before operating the power tool. Please keep this

manual available for others before they use the power tool.

C 7YA

MODEL DUST COLLECTION CIRCULAR SAW

MODÈLE

SCIE CIRCULAIRE AVEC COLLECTEUR DE POUSSIERE

MODELO

SIERRA CIRCULAR CON TOWA DE ASPIRACION

MODE D’EMPLOI ET INSTRUCTIONS DE SECURITE

AVERTISSEMENT

Une utilisation incorrecte et dangereuse de cet outil motorisé peut entraîner la

mort ou de sérieuses blessures corporelles!

Ce mode d’emploi contient d’importantes informations à propos de la sécurité de

ce produit. Prière de lire et de comprendre ce mode d’emploi avant d’utiliser l’outil

motorisé. Garder ce mode d’emploi à la disponibilité des autres utilisateurs avant

qu’ils utilisent l’outil motorisé.

MANUAL DE INSTRUCCIONES E INSTRUCCIONES DE SEGURIDAD

ADVERTENCIA

¡La utilización inapropiada e insegura de esta herramienta eléctrica puede resultar

en lesiones serias o en la muerte!

Este manual contiene información importante sobre la seguridad del producto.

Lea y comprenda este manual antes de utilizar la herramienta eléctrica. Guarde

este manual para que puedan leerlo otras personas antes de que utilicen la

herramienta eléctrica.

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IMPORTANT INFORMATION

Read and understand all of the operating instructions, safety precautions and warnings in

the Instruction Manual before operating or maintaining this power tool.

Most accidents that result from power tool operation and maintenance are caused by the

failure to observe basic safety rules or precautions. An accident can often be avoided by

recognizing a potentially hazardous situation before it occurs, and by observing appropriate

safety procedures.

Basic safety precautions are outlined in the “SAFETY” section of this Instruction Manual and

in the sections which contain the operation and maintenance instructions.

Hazards that must be avoided to prevent bodily injury or machine damage are identified by

WARNINGS on the power tool and in this Instruction Manual.

Never use this power tool in a manner that has not been specifically recommended by

HITACHI, unless you first confirm that the planned use will be safe for you and others.

MEANINGS OF SIGNAL WORDS

WARNING indicates a potentially hazardous situations which, if ignored, could result in

serious personal injury.

CAUTION indicates a hazardous situations which, if ignored, could result in moderate

personal injury, or could cause machine damage.

NOTE emphasizes essential information.

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SAFETY

SAFETY RULES

WARNING: Death or serious bodily injury could result from improper or unsafe use

of power tools. To avoid these risks, follow these basic safety instruc-

tions:

READ ALL INSTRUCTIONS

1. NEVER TOUCH MOVING PARTS.

Never place your hands, fingers or other body parts near the tool’s moving parts.

2. NEVER OPERATE WITHOUT ALL GUARDS IN PLACE.

Never operate this tool without all guards or safety features in place and in proper

working order. If maintenance or servicing requires the removal of a guard or safety

feature, be sure to replace the guard or safety feature before resuming operation of the

tool.

3. ALWAYS WEAR EYE AND EAR PROTECTOR.

Protect yourself from flying or expelled wood chips, metal particles or other debris by

using protective goggles or equivalent eye protector. Wear ear protector to protect

yourself from excessive noise.

4. PROTECT YOURSELF AGAINST ELECTRIC SHOCK.

Prevent body contact with grounded surfaces such as pipes, radiators, ranges and

refrigeration enclosures. Never operate the tool in damp or wet locations.

5. DISCONNECT TOOLS.

Never leave the tool connected to a power source. Always disconnect the tool from its

power source before servicing, inspecting, maintaining, cleaning and before changing

or checking any parts.

6. AVOID UNINTENTIONAL STARTING.

Don’t carry the tool while it is connected to its power source. Don’t carry the tool with

your finger near the power switch. Be sure the power switch is in the ‘“off” position

before connecting the tool to its power source.

7. STORE TOOL PROPERLY.

When not in use, the tool should be stored in a dry place. Keep out of reach of children.

Lock-out the storage area.

8. KEEP WORK AREA CLEAN.

Cluttered areas and benches invite injuries. Clear all work areas and work benches of

unnecessary tools, debris, furniture, etec.

9. 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 and well ventilated.

Don’t use 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 sites containing lacquer, paint, benzine, thinner,

gasoline, gases, adhesive agents, and other materials which are combustible or

explosive.

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10. KEEP CHILDREN AWAY.

Do not let visitors contact tool or extension cord.

All visitors should be kept safely away from work area.

11. DON’T FORCE TOOL.

It will do the job better and safer at the rate for which it was intended.

12. USE RIGHT TOOL.

Don’t force small tool or attachment to do the job of a heavy-duty tool.

Don’t use tool for purpose not intended—for example—don’t use circular saw for cutting

tree limbs or logs.

13. DRESS PROPERLY.

Do not wear loose clothing or jewelry. 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.

14. USE FACE, DUST MASK OR RESPIRATOR IF OPERATION IS DUSTY.

All persons in the area where power tools are being operated should also wear face, dust

mask or respirator.

15. DON’T ABUSE CORD.

Never carry tool by cord or yank it to disconnect from receptacle.

Keep cord from heat, oil and sharp edges.

16. SECURE WORK.

Use clamps or a vise to hold work. It’s safer than using your hand and it frees both hands

to operate tool.

17. DON’T OVERREACH.

Keep proper footing and balance at all times.

18. MAINTAIN TOOLS WITH CARE.

Keep 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 an authorized service

center. Inspect extension cords periodically and replace if damaged.

Keep handles dry, clean, and free from oil and grease.

19. REMOVE ADJUSTING KEYS AND WRENCHES.

Keys and adjusting wrenches remove from tool before turning it on.

20. OUTDOOR USE EXTENSION CORD.

When tool is used outdoors, use only extension cord intended for use outdoors and so

marked.

21. STAY ALERT.

Watch what you are doing. Use common sense. Do not operate tool when you are tired.

Tools should never be used by you if you are under the influence of alcohol, drugs or

medication that makes you drowsy.

22. CHECK DAMAGED PARTS.

Before further use of the tool, a guard or other part that is damaged should be carefully

checked to determine that it will operate properly and perform its intended function.

Check for 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.

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Have defective switches replaced by the authorized service center.

Do not use tool if switch does not turn it on and off.

23. NEVER USE A POWER TOOL FOR APPLICATIONS OTHER THAN THOSE SPECIFIED.

Never use a power tool for applications other than those specified in the Instruction

Manual.

24. HANDLE TOOL CORRECTLY.

Operate the tool according to the instructions provided herein. Do not drop or throw the

tool. Never allow the tool to be operated by children, individuals unfamiliar with its

operation or unauthorized personnel.

25. CHECK FOR LIVE WIRES.

Avoid the risk of severe electrical shock by checking for live electrical wires that may be

buried in walls, floors or ceilings. The wires should be de-energized before work begins.

26. KEEP ALL SCREWS, BOLTS AND COVERS TIGHTLY IN PLACE.

Keep all screws, bolts, and plates tightly mounted. Check their condition periodically.

27. DO NOT USE POWER TOOLS IF THE PLASTIC HOUSING OR HANDLE ARE CRACKED.

Cracks in the tool’s housing or handle can lead to electric shock. Such tools should not

be used until repaired.

28. BLADES AND ACCESSORIES MUST BE SECURELY MOUNTED TO THE TOOL.

Prevent potential injuries to yourself or others. Blades, cutting implements and acces-

sories which have been mounted to the tool should be secure and tight.

29. KEEP MOTOR AIR VENT CLEAN.

The tool’s motor air vent must be kept clean so that air can freely flow at all times. Check

for dust build-up frequently.

30. OPERATE POWER TOOLS AT THE RATED VOLTAGE.

Operate the power tool at voltages specified on their nameplates.

If using the power tool at a higher voltage than the rated voltage, it will result in

abnormally fast motor revolution and may damage the unit and burn out the motor.

31. NEVER USE A TOOL WHICH IS DEFECTIVE OR OPERATING ABNORMALLY

If the tool appears to be operating unusually, making abnormal noises, or otherwise

appears defective, stop using it immediately and arrange for repairs by a Hitachi

authorized service center.

32. NEVER LEAVE TOOL RUNNING UNATTENDED. TURN POWER OFF.

Don’t leave tool until it comes to a complete stop.

33. CAREFULLY HANDLE POWER TOOLS.

Should a power tool be dropped or struck against hard materials inadvertently it may

be deformed, cracked, or damaged.

34. DO NOT WIPE PLASTIC PARTS WITH SOLVENT.

Solvents such as gasoline, thinner, benzine, carbon tetrachloride, and alcohol may

damage and crack plastic parts. Do not wipe them with such solvents.

Wipe plastic parts with a soft cloth lightly dampened with soapy water and dry

thoroughly.

35. WHEN REPLACING A COMPONENT PART, ADOPT THE SAME TYPE. When replacing a

component part with a new one, adopt the same type of new part. Also, never attempt

to repair a power tool yourself.

36. KEEP GUARDS IN PLACE AND IN WORKING ORDER. Never wedge of tie lower guard

open. Check operation of lower guard before each use. Do not use if lower guard dose

not close briskly over saw blade.

CAUTION: If saw is dropped, lower guard may be bent, restricting full return.

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37. KEEP BLADES CLEAN AND SHARP. Sharp blades minimize stalling and kickback.

38. DANGER: KEEP HANDS AWAY FROM CUTTING AREA. Keep hands away from blades.

Do not reach underneath work while blade is rotating. Do not attempt to remove cut

material when blade is moving.

CAUTION: Blades coast after turn off.

39. SURRPORT LARGE PANELS. Large panels must be supported as shown in Fig. 1 to

minimize the risk of blade pinching and kickback. When cutting operation requires the

resting of saw on the work piece, the saw shall be rested on the larger portion and the

smaller piece cut off.

To avoid kickback, do support board Don't support board or panel away

or panel near the cut. from the cut.

Fig. 1 Fig. 2

40. USE RIP FENCE. Always use a fence or straight edge guide when ripping.

41. WARNING: It is important to support the work piece properly and to hold the saw firmly

to prevent loss of control which could cause personal injury. Fig. 3 illustrates typical

hand support of the saw. When operating the saw, keep the cord away from the cutting

area and position it so that it will not be caught on the work piece during the cutting

operation.

A TYPICAL ILLUSTRATION OF PROPER HAND SUPPORT.

WORK PIECE SUPPORT, AND SUPPLY CORD ROUTING

Fig. 3

42. GUARD AGAINST KICKBACK. Kickback occurs when the saw stalls rapidly and is driven

back towards the oprator. Release switch immediately if blade binds or saw stalls.

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Keep blades sharp.

Support large panels as shown in Fig. 1.

Use fance or straight edge guide when ripping.

Don't fence tool.

Stay alert exercise control.

Don't remove saw from work during a cut while the blade is moving.

43. LOWER GUARD. Raise lower guard with the retracing handle (Lever).

44. ADJUSTMENTS. Before cutting be sure depth and bevel adjustments are tight.

45. USE ONLY CORRECT BLADES IN MOUNTING. Do not use blade with incorrect size

holes.

Never use defective or incorrect blade washers or bolts.

46. AVOID CUTTING NAILS. Inspect for and remove all nails from work piece before

cutting.

47. DO NOT RUN THE SAW WHILE CARRYING IT AT YOUR SIDE.

48. Place the wider portion of the saw base on that part of the work piece which is solidly

supported, not on the section that will fall off when the cut is made. As examples, Fig.

4 illustrates the RIGHT way to cut off the end of board, and Fig. 5 the WRONG way. If the

work piece is short or small, clamp is down.

DON’T TRY TO HOLD SHORT PLACES BY HAND!

Fig. 4 Fig. 5

49. Use extra caution when making a “Pocket

Cut” into existing walls or other blind areas.

The protruding blade may cut objects that can

cause KICKBACK.

NEVER place your hand or fingers behind the

saw. If kickback occurs, the saw could easily

jump backwards over your hand, possibly

causing severe injury.

Fig. 6

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50. Before setting the tool down after completing a cut, be sure that the lower (telescoping)

guard has closed and the blade has come to a complete stop.

51. Never attempt to saw any material like metal and so on that give off sparks. Such action

can lead to fire or injury.

52. Never attempt to saw with the circular saw

held upside down in a vise. This is extremely

dangerous and can lead to serious accidents.

(Fig. 7)

Fig. 7

SERVICE AND REPAIRS

All quality power tools will eventually require servicing or replacement of parts because of

wear from normal use. To assure that only genuine replacement parts will be used, all service

and repairs must be performed by a HITACHI AUTHORIZED SERVICE CENTER, ONLY.

REPLACEMENT PARTS

When servicing use only identical replacement parts.

Repairs should be conducted only by a Hitachi authorized service center.

POLARIZED PLUGS

To reduce the risk of electrick shock, this equipment has a polarized plug (one blade is wider

than the other).

This plug will fit in a polarized outlet only one way.

If the plug does not fit fully in the outlet, reverse the plug.

If it still does not fit, contact a qualified electrician to install the proper outlet.

Do not change the plug in any way.

Vise

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USE OF EXTENSION CORD

Make sure your extension cord is in good condition. When using an extension cord, be sure

to use one heavy enough to carry the current your product will draw.

An undersized cord will cause a drop in line voltage resulting in loss of power and

overheating. Table shows the correct size to use depending on cord length and nameplate

ampere rating. If in doubt, use the next heavier gage. The smaller the gage number, the

heavier the cord.

MINIMUM GAGE FOR CORD SETS

Total Length of Cord in Feet (Meter)

0 – 25 26 – 50 51 – 100 101 – 150

(0 – 7.6) (7.9 – 15.2) (15.5 – 30.5) (30.8 – 45.7)

Ampere Rating AWG

More Not More

Than Than

0 – 618161614

6 – 10 18 16 14 12

10 – 12 16 16 14 12

12 – 16 14 12 Not Recommended

WARNING: Avoid electrical shock hazard. Never use this tool with a damaged or

frayed electrical cord or extension cord.

Inspect all electrical cords regularly. Never use in or near water or in any

environment where electric shock is possible.

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DOUBLE INSULATION FOR SAFER OPERATION

To ensure safer operation of this power tool, HITACHI has adopted a double insulation

design. “Double insulation “ means that two physically separated insulation systems have

been used to insulate the electrically conductive materials connected to the power supply

from the outer frame handled by the operator. Therefore, either the symbol “

” or the words

“Double insulation” appear on the power tool or on the nameplate.

Although this system has no external grounding, you must still follow the normal electrical

safety precautions given in this Instruction Manual, including not using the power tool in wet

environments.

To keep the double insulation system effective, follow these precautions:

䡬 Only HITACHI AUTHORIZED SERVICE CENTER should disassemble or assemble this

power tool, and only genuine HITACHI replacement parts should be installed.

䡬 Clean the exterior of the power tool only with a soft cloth moistened with soapy water,

and dry thoroughly.

Never use solvents, gasoline or thinners on plastic components; otherwise the plastic

may dissolve.

SAVE THESE INSTRUCTIONS

AND

MAKE THEM AVAILABLE TO

OTHER USERS OF THIS TOOL!

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FUNCTIONAL DESCRIPTION

NOTE:

The information contained in this Instruction Manual is designed to assist you in the safe

operation and maintenance of the power tool.

Some illustrations in this Instruction Manual may show details or attachments that differ

from those on your own power tool

NAME OF PARTS

Fig. 8

SPECIFICATIONS

Motor Single-Phase, Series Commutator Motor

Power Source Single-Phase 120V AC 60Hz

Max. Cutting Depth 2-3/8" (60mm)

Current 13 A

No-Load Speed 5500/min.

Weight (without cord) 11.3 lbs (5.1 kg)

Handle

Switch

Lock Lever

Wing Bolt (B)

Lock Spring

Wing Bolt (A)

Slide Cover

Safety Cover

(Lower Guard)

Saw Blade

Base

Lever

(Retracting

Handle)

Gear Cover

Saw Cover

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Work piece Base

Saw Blade

ASSEMBLY AND OPERATION

APPLICATIONS

䡬 Cutting fiber cement board

(Ex. HARDI PLANK, HARDI PANEL)

PRIOR TO OPERATION

1. Power source

Ensure that the power source to be utilized conforms to the power source requirements

specified on the product nameplate.

2. Power switch

Ensure that the switch is in the OFF position. If the plug is connected to a receptacle while

the switch is in the ON position, the power tool will start operating immediately and can

cause serious injury.

3. Extension cord

When the work area is far away from the power source, use an extension cord of sufficient

thickness and rated capacity. The extension cord should be kept as short as practicable.

WARNING: Damaged cord must be replaced or repaired.

4. Check the receptacle

If the receptacle only loosely accepts the plug, the receptacle must be repaired. Contact

a licensed electrician to make appropriate repairs.

If such a fautly receptacle is used, it may cause overheating, resulting in a serious hazard.

5. Confirming condition of the environment:

Confirm that the work site is placed under appropriate conditions conforming to

prescribed precautions.

6. Prepare a wooden workbench (Fig. 9)

Since the saw blade will extend beyond the

lower surface of the work piece, place the work

piece on a workbench when cutting. If a square

block is utilized as a workbench, select level

ground to ensure it is properly stabilized. An

unstable workbench will result in hazardous

operation.

CAUTION:

To avoid possible accident, always ensure that

the portion of work piece remaining after cutting

is securely anchored or held in position.

Fig. 9

Workbench

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7. Check if clamp lever and wing bolt are tightened.

If the wing bolt to adjust cutting depth (Fig. 12) and wing bolt to adjust angle of inclination

(Fig. 13) are loose, injury can result. Make sure that they are tightened securely.

8. Check performance of safety cover

WARNING: Make absolutely sure that the safety cover is not fixed. Also, check and

see if it can move smoothly. If the saw blade is kept exposed injury can

result.

The safety cover (refer to Fig. 8) serves to protect your body from coming into contact with

the saw blade. Make absolutely certain that the cover smoothly performs to cover the saw

blade. If the safety cover should not move smoothly, never use it without repairing it.

In such a case, get in touch with the store where you bought the circular saw or the

HITACHI Authorized Service Center for necessary repair.

9. Protective glasses and dustproof mask (Fig. 10)

When you use the tool, make certain that you wear the protective glasses and the

dustproof mask.

10.Dust bag or dust guide

Make it absolutely sure when you use the tool to

mount any one of the dust bag or dust guide

that is provided as a standard accessory. For

mounting details and refer to [use of dust bag]

in Page 17, [use of dust guide] in Page 17.

11.Check if saw blade is tightened

Refer to [mounting and dismounting the saw

blade] in Page 16, and make sure that the flange

bolt is tightened securely.

ADJUSTSING THE SAW PRIOR TO USE

1. Adjustment of slide cover

WARNING:

To avoid serious accidents, ensure the switch

is in OFF position, and disconnect the plug from

the receptacle.

You can move the slide cover of the tool up and

down. The slide cover is mounted in the

lowermost position when the tool is shipped

from the factory. If you use it in the originally

mounted position for right-angle cutting, you

can reduce the scattering sawdust particles.

Fig. 10

Fig. 11

Slide

Cover

Screw

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When you find it difficult to inspect the blade

tip, or in case of inclined cutting, or when you

use the guide for cutting, loosen the screw,

move the slide cover upward and make

necessary adjustment before use. (For inclined

cutting, fix the slide cover in the uppermost

position.) Make sure that the screw is tightened

securely after adjustment.

2. Adjusting the cutting depth (Fig. 12)

WARNING:

If the clamp lever is loose, injury can result.

Tighten it securiely after adjustment.

To adjust cutting depth, loosen the clamp lever

and, while holding the base with one hand,

move the main body up and down to obtain the

prescribed cutting depth. After adjusting to the

prescribed cutting depth, tighten the clamp

lever securely.

3. Adjusting the angle of inclination

WARNING:

If the wing bolt is loose, injury can result.

Tighten it securiely after adjustment.

NOTE: Keep the slide cover moved up to the uppermost position before making adjustment

on the angle of inclination. (Refer to [adjustment of slide cover] in Page 13)

As shown in Fig. 13 by loosening the wing-bolt on the inclined gauge, the saw blade may

be inclined to a maximum angle of 45° in relation to the base. Always ensure that the

wing-bolt is thoroughly tightened after making the desired adjustment.

4. Regulating the guide (Rip fence)

.......................................... Optional Accessory

NOTE: When mounting the guide, move the slide

cover upward to the extent where the guide

is not in touch with the slide cover. (Refer to

[adjustment of slide cover] in Page 13)

The cutting position can be regulated by moving

the guide to the left or right after loosening its

wing-bolt. The guide may be mounted on either

the right or left side of the tool. (See Fig. 14)

Fig. 12

Fig. 13

Fig. 14

Wing Bolt (B), Lock Spring

Base

Guide

(Rip Fence)

Clamp Lever

Loosen

Tighten

Link

Wing Bolt (A)

Base

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CUTTING PROCEDURES

WARNING:

● Never touch the moving parts.

● Should the saw blade be stopped or make an abnormol noise during operation, turn off

the switch immediately.

● Don't remove circular saw from work piece during a cut while the saw blade is moving.

● Wear protective glasses and a dustproof mask.

● Avoid cutting any material like metal, etc., that give off sparks.

CAUTION:

● Always take care in preventing the power cord from coming near the revolving saw

blade.

● Mount either of the dust bag, or dust guide before use.

● Before starting to saw, ensure that the saw blade has reached full speed revolution.

1. Place the saw body (base) on the work piece,

and as in Fig. 15 align the intended line of cut

with the saw blade, using the notch at the front

of the base. This relationship of base to work

pieces should remain unchanged regardless of

the inclination of the base.

2. The switch should be turned to the ON position

before the saw blade comes into contact with

the work piece. The switch is turned ON when

the trigger is pulled by one’s finger, and is

turned OFF when the trigger is released.

3. Moving the saw straight at a constant speed will

produce optimum cutting.

[POCKET CUTTING]

WARNING:

● To avoid serious accident, ensure the switch is

OFF position, and disconnect the plug from the

receptacle before any adjustment.

● Never tie or wedge the safety cover in a raised

position.

1. Mark the desired cutting area clearly with lines

all side. (See Fig. 16)

2. Set depth adjustment according to material to

be cut.

3. Push the safety cover lever all the way back so

the blade is exposed as shown in Fig. 16.

4. Tilt saw forward and align the notch (Fig. 15)

with the pre-marked guide line.

Fig. 15

When

not

Inclined

Fig. 16

Lever

When

Inclined

45°

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5. Release the safety cover lever. When the safety cover contacts the work piece surface,

it will be in proper position to open freely when cutting is commencend.

6. Holding the saw in position, with the blade not contacting the work piece surface, pull

the trigger.

7. After the saw has reached full speed, gradually lower rear end of the saw until its base

rests on the work surface.

8. Advance saw along the cutting line up to the corner.

9. Release trigger and allow blade to stop completely before withdrawing the blade from

the work piece.

䡩 Never under any circumstances pull the saw backwards while the blade is in motion, as

kickback may result.

10. Use a jig saw or hand saw to cut the corners out clean.

11. When starting each new cut, repeat as above.

MOUNTING AND DISMOUNTING THE SAW BLADE

WARNING: To avoid serious accident ensure the switch is in the OFF position, and

disconnect the plug from the receptacle.

1. Dismounting the saw blade (Fig. 17)

To replace the saw blade, push the lock lever,

then loosen the hexagonal bolt with the wrench.

The blade comes off easily.

2. Mounting the saw blade

(1) Thoroughly remove any sawdust which has

accumulated on the spindle, bolt and washers.

(2) For mounting saw blade, the concave sides of

both washers (A) and (B) must be fitted to the

saw blade sides. Mount the saw blade on the

spindle, and finally affix washer (B) (See Fig. 18)

(3) To assure proper rotation direction of the saw

blade, the arrow direction on the saw blade

must coincide with the arrow direction on the

saw cover.

(4) Using the fingers, tighten the hexagonal bolt

retaining the saw blade as much as possible.

Then depress the lock lever, lock the spindle,

and thoroughly tighten the bolt.

(5) Confirm that the lock lever is in the original

position.

Fig. 18

Hexagonal

Flange Bolt

Washer (A)

Washer (B)

Saw Blade

Fig. 17

Lock Lever

Wrench

Loosen

Tighten

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USE OF DUST BAG

WARNING:

● To avoid serious accident, ensure the switch is in the OFF position, and disconnect the

plug from the receptacle.

● Never attempt to saw any material like metal and so on that give off sparks. Such action

can lead to fire or injury.

1. Mounting the dust bag

Hold the clasp of the dust bag and insert it into

the adapting mouth of the body while opening

the thrusting mouth. (Fig. 19)

2. Dumping sawdust and cleaning the

inside of dust bag

NOTE: If too much sawdust is accumulated inside

the dust bag, the dust collector will run low

on power. Attempt to dump the sawdust as

early as you can and clean the dust bag

thoroughly so that you can enjoy your work

with strong dust collecting power.

(1) Hold the clasp, open the thrusting mouth of the

dust bag, and pull it off from the body.

(2) Open the fastener (Fig. 20) and dump the

sawdust.

USE OF DUST GUIDE

WARNING:

● To avoid serious accidents, ensure the switch is in the OFF position, and disconnect the

plug from the receptacle.

● The dust guide is a component part that changes the discharge direction of sawdust and

is not a tool to collect dust. Make certain that you wear protective glasses and a

dustproof mask during the use of the dust guide.

CAUTION:

● The dust guide can change the direction of the discharge direction. Never point it in the

direction of the worker.

● Never carry the tool by the dust guide.

Fig. 19

Fig. 20

Dust Bag

Adapting Mouth

Clasp

Fastener

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1. Mounting the dust guide

(1) Insert the dust guide’s thrusting mouth into the

adapting mouth of the body. (Fig. 21)

(2) Turn the dust guide and point it in the desired

direction to discharge sawdust. (Fig. 22)

Fig. 22

Fig. 21

Thrusting Mouth

Adapting Mouth

Dust Guide

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Fig. 24

MAINTENANCE AND INSPECTION

WARNING: To avoid serious accident, ensure the switch is in the OFF position and

disconnect the plug from the receptacle during maintenance and

inspection.

1. Inspecting the saw blade:

Since use of a dull saw blade will degrade efficiency and cause possible motor

malfunction, sharpen or replace the saw blade as soon as abrasion is noted.

CAUTION:

If a dull saw blade is used, reactive force is increased during cutting operation. Avoid

the use of the dull saw blade without repair.

2. Check the mounting screws

Loose mounting screws are dangerous. Regularly inspect them and make sure they are

tight.

CAUTION: Using this power tool with loosened screws is extremely dangerous.

3. Inspecting the carbon brushes (Fig. 24)

The motor employs carbon brushes which are

consumable parts. Replace the carbon brush

with a new one when it becomes worn to its

wear limit. Always keep carbon brushes clean

and ensure that they slide freely within the

brush holders.

CAUTION:

Using this circular saw with a carbon brush which is worn in excess of the wear limit will

damge the motor.

NOTE: Use HITACHI carbon brush No. 38 indicated in Fig. 24.

4 Replacing carbon brushes:

Remove the brush caps with a slotted-head screwdriver. The carbon brushes can then be

easily removed.

5. Performance checkup and maintenance of safety cover

Keep the safety cover in good shape for smooth performance at all times. Be sure to make

prompt repair in case of any malfunction.

6. Adjusting the base and saw blade to maintain perpendicularity

The angle between the base and the saw blade has been adjusted to 90°, however should

this perpendicularity be lost for some reason, adjust in the following manner.

Wear limit

No. of carbon

brush

0.24"(6mm)

38

0.67"

(17mm)

English

21

(1) Turn the base face up (Fig. 25) and loosen the

wing-nut.

(2) Apply a square to the base and the saw blade

and, turning the slotted set screw with a slotted-

head screwdriver, shift the position of the base

to produce the desired right angle.

7. Service parts list

CAUTION:

Repair, modification and inspection of Hitachi Power Tools must be carried out by an

Hitachi Authorized Service Center.

This Parts List will be helpful if presented with the tool to the Hitachi Authorized Service

Center when requesting repair or other maintenance. In the operation and maintenance

of power tools, the safety regulations and standards prescribed in each country must be

observed.

MODIFICATIONS:

Hitachi Power Tools are constantly being improved and modified to incorporate the latest

technological advancements.

Accordingly, some parts (i.e. code numbers and/or design) may be changed without prior

notice.

Fig. 25

Square

Slotted Set Screw

Base

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Hitachi C 7YA User manual

Hitachi C 7YA User manual

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