DH 24PA - Drill HITACHI - Free user manual and instructions

Product Type	Rotary Hammer Drill
Model	DH 24PA
Brand	Hitachi
Power Supply	AC 230V, 50/60Hz
Power Rating	800 W
No-Load Speed	0-1050 rpm
Impact Rate	0-4600 bpm
Maximum Drilling Capacity (Concrete)	24 mm
Maximum Drilling Capacity (Steel)	13 mm
Maximum Drilling Capacity (Wood)	30 mm
Chuck Type	SDS-Plus
Weight	2.3 kg
Dimensions (L x W x H)	360 x 85 x 210 mm
Variable Speed Trigger	Yes
Forward/Reverse Rotation	Yes
Safety Clutch	Yes
Vibration Control	Vibration-absorbing side handle
Dust Extraction	Compatible with optional dust collector
Maintenance	Clean ventilation slots, lubricate chuck monthly
Spare Parts Availability	Brass holder, carbon brush, switch assembly available

Frequently Asked Questions - DH 24PA HITACHI

What is the maximum drilling depth in concrete for the Hitachi DH 24PA?

The maximum drilling depth in concrete is 24 mm. For deeper holes, use a longer bit and periodically clean the hole.

Can the DH 24PA be used for chiseling?

Yes, the DH 24PA has a hammer-only mode for light chiseling. Rotate the mode selector to the hammer symbol and use an SDS-Plus chisel bit.

How do I change the SDS-Plus bit?

Pull back the chuck sleeve, insert the bit until it clicks, then release the sleeve to lock. To remove, pull the sleeve back and pull out the bit.

What type of grease should I use for the DH 24PA?

Use Hitachi grease or a lithium-based grease for the impact mechanism. Apply a small amount to the bit shank and inside the chuck periodically.

How do I adjust the auxiliary side handle?

Loosen the clamp by rotating the handle counterclockwise. Slide the handle to the desired position on the collar, then tighten clockwise.

Why does my drill stop suddenly during operation?

The safety clutch engages to prevent torque kickback. Reduce pressure and ensure the bit is not jammed. If it trips frequently, check for binding.

How often should I replace the carbon brushes?

Inspect carbon brushes every 50 hours of use. Replace when they are worn down to 6 mm length. Use only genuine Hitachi brushes.

Can I use a 2-pin extension cord with the DH 24PA?

Yes, but ensure the cord is rated for the tool's current and is in good condition. For outdoor use, a waterproof extension cord is recommended.

What is the correct way to store the drill?

Store in a dry place, clean any dust, and keep the chuck lightly greased. Remove the battery if cordless, but the DH 24PA is corded, so coil the cord loosely.

Where can I find the serial number on the DH 24PA?

The serial number is located on the rating plate attached to the body of the drill, near the power cord entry. It is used for warranty and parts identification.

USER MANUAL DH 24PA HITACHI

Line drawing of a drill bit with handle and screwdriver (no text or symbols)

Read through carefully and understand these instructions before use.

Bruksanvisning

Brugsanvisning

Bruksanvisning

Käyttöohjeet

Handling Instructions

1

2

3

4

5

6

Line drawing of a hand using a drill to shoot material, with scattered particles flying around (no text or symbols)

7

8

Line drawing of a hand holding a drill bit with a tool, no text or symbols present

18

	a 27
285mm 41
29-	7	2

19

	Svenska Dansk Norsk
1Borrskä Bor Bor
2Del av SDS-plus nacke Del af SDS Plus skaft Del på SDS-plusstange
3Framskydd Frontdæksel Frontkapsel
4Tryckring Bajonetlås Grep
5Dammfångare Støvkop Støvkop
6	Dammsamlare (B)	Støvsamler (B)	Støvsamler (B)
7	Väljare för rotationriktning	Omskifer	Spak
8	Ändringsspaken	Omskifteren	Skiftehendelen
9Borrchuck Borepatron Borechuck
10Chucktillsats Boreadapter Chuckadapter
11	Chucktillsats (D)	Boreadapter (D)	Chuckadapter (D)
12Skruvdragare Bits		Bits
13Ändbeslag Fatning Sokkel
14Stödhandtag Sidegreb Sidehändtak
15Djupmätt Dybdemåler Dypmåler
16Fästhål Monteringshul Monteringshull
17	Tillsats för koniskt borrskaft	Konusskaftadapter	Konusskaftadapter
18Kil Kile		Kile
19Stödklossar Underlag Støtte
20Borrkrona Borekrone Kjernebor
21	Borrkronans skaft	Borekroneskaft	Kjerneborskaft
22Gängad del Gevind Gjenge
23Cantrumtapp Centerstift Senterbolt
24Styrplatta Styreplade Glideplate
25	Borrkronans huvud	Borekronespids	Kjerneborspiss
26	Avnötningsgräns	Slidgrænse	Slitasjegrense
27	Nr. på kolborste	Kul nr.	Kullbørstens nr.
28	Vanlig kolborste	Almindelig kulborste	Vanlig kullborste
29Automatisk, motoravstängande Auto-stop bulbørster			Kullborste som stopper motoren automatisk
30Kolhällare Kulholder Børsteholder
31Kolborste Kul Kullborste
32	Den inre ledningsdragningen	Indvendig ledningsfmring	Innvendig viking
33	Strömbrytare (startomkopplare)	Kontakt	Bryter

Illustration of four different tools crossed out by a diagonal line (no text or symbols)

• 

Line drawing of a manual electric drill with handle and screwdriver (no text or symbols)

Line drawing of a manual electric drill (no text or symbols)

( Standardsockel i handeln

Technical line drawing of a threaded pipe fitting (no text or symbols)

Line drawing of a manual drill bit with handle and screwdriver (no text or symbols)

Line drawing of a manual electric drill with handle and screwdriver (no text or symbols)

Kile

Udv. diam.

11,0 mm

12,3 mm

12,7 mm

14,3 mm

14,5 mm

17,5 mm

21,5 mm

Ankerstørrelse

W1/4"

W5/16"

W3/8"

W1/2"

W5/8"

+

3. Boring at hul med stor diameter (Rotation + slag)

○Centerstift, borekrone, skaft til borekrone og styreplade

Illustration of four crossed writing tools with a diagonal line crossing through them (no text or symbols)

• 

Line drawing of a manual drill bit with handle and screwdriver (no text or symbols)

Line drawing of a drill bit with handle and screwdriver (no text or symbols)

(SDS Plus skaft) (Standardfatning) 12,7 mm adapter til kemisk ankerjern på markedet 19 mm adapter til kemisk ankerjern

○Adapter for bolt (for slagboremaskin)

○Adapter for bolt (vanlig hammer)

Boltstørrelse

W1/4"

W5/16"

W3/8"

W1/2"

W5/8"

Line drawing of a manual electric drill with handle and screwdriver (no text or symbols)

Three crossed tool tips with a diagonal X mark, no text or symbols present

Line drawing of a drill bit with handle and screwdriver (no text or symbols)

VEDLIKEHOLD OG KONTROLL

Line drawing of a manual electric drill with handle and screwdriver (no text or symbols)

Line drawing of a manual drill bit with handle and screwdriver (no text or symbols)

Kiila

Ulkohalkaisija

11,0 mm

12,3 mm

12,7 mm

14,3 mm

14,5 mm

17,5 mm

21,5 mm

Ankkurin koko

W1/4"

W5/16"

W3/8"

Line drawing of a manual electric drill with handle and screwdriver (no text or symbols)

Ankkurin koko

W1/4"

W5/16"

W3/8"

W1/2"

W5/8"

Illustration of crossed writing tools with a diagonal line crossing through them (no text or symbols)

• 

Line drawing of a drill bit with handle and screwdriver (no text or symbols)

Line drawing of a manual electric drill with handle and screwdriver (no text or symbols)

When using electric tools, basic safety precautions should always be followed to reduce the risk of fire, electric shock and personal injury, including the following.

Read all these instructions before operating this product and save these instructions.

For safe operations:

1. Keep work area clean. Cluttered areas and benches invite injuries.

2. Consider work area environment. Do not expose power tools to rain. Do not use power tools in damp or wet locations. Keep work area well lit. Do not use power tools where there is risk to cause fire or explosion.

3. Guard against electric shock. Avoid body contact with earthed or grounded surfaces. (e.g. pipes, radiators, ranges, refrigerators).

4. Keep children away. Do not let visitors touch the tool or extension cord. All visitors should be kept away from work area.

5. Store idle tools. When not in use, tools should be stored in a dry, high or locked up place, out of reach of children.

6. Do not force the tool. It will do the job better and safer at the rate for which it was intended.

7. Use the right tool. Do not force small tools or attachments to do the job of a heavy duty tool. Do not use tools for purposes not intended; for example, do not use circular saw to cut tree limbs or logs.

8. Dress properly. Do not wear loose clothing or jewellery, they can be caught in moving parts. Rubber gloves and non-skid footwear are recommended when working outdoors. Wear protecting hair covering to contain long hair.

9. Use eye protection. Also use face or dust mask if the cutting operation is dusty.

10. Connect dust extraction equipment. If devices are provided for the connection of dust extraction and collection facilities ensure these are connected and properly used.

11. Do not abuse the cord. Never carry the tool by the cord or yank it to disconnect it from the receptacle. Keep the cord away from heat, oil and sharp edges.

12. Secure work. Use clamps or a vice to hold the work. It is safer than using your hand and it frees both hands to operate tool.

13. Do not overreach. Keep proper footing and balance at all times.

14. Maintain tools with care. Keep cutting tools sharp and clean for better and safer performance. Follow instructions for lubrication and changing accessories. Inspect tool cords periodically and if damaged, have it repaired by authorized service center. Inspect extension cords periodically and replace, if damaged. Keep handles dry, clean, and free from oil and grease.

15. Disconnect tools. When not in use, before servicing, and when changing accessories such as blades, bits and cutters.

16. Remove adjusting keys and wrenches. Form the habit of checking to see that keys and adjusting wrenches are removed from the tool before turning it on.

17. Avoid unintentional starting. Do not carry a plugged-in tool with a finger on the switch. Ensure switch is off when plugging in.

18. Use outdoor extension leads. When tool is used outdoors, use only extension cords intended for outdoor use.

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

20. 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, free running 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 in this handling instructions. Have defective switches replaced by an authorized service center. Do not use the tool if the switch does not turn it on and off.

21. Warning The use of any accessory or attachment, other than those recommended in this instruction manual, may present a risk of personal injury.

22. Have your tool repaired by a qualified person. This electric tool is in accordance with the relevant safety requirements. Repairs should only be carried out by qualified persons using original spare parts. Otherwise this may result in considerable danger to the user.

PRECAUTIONS ON USING ROTARY HAMMER

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.

4. Always hold the body handle and side handle of the power tool firmly. Otherwise the counterforce produced may result in inaccurate and even dangerous operation.

SPECIFICATIONS

Model DH24PA DH24PB
Voltage (by areas)* (110V, 115V, 120V, 127V, 220V, 230V, 240V)
Power Input 620W*
No-load speed 1050/min. 0 – 1050/min.
Full-load impact rate 4400/min.
Capacity: concrete 3.4 – 24 mmsteel 13 mmwood 32 mm
Weight (without cord and side handle) 2.3 kg

*Be sure to check the nameplate on product as it is subject to change by areas.

STANDARD ACCESSORIES

(1) Case (Molded plastic)....1
(2) Side handle 1
(3) Depth gauge .... 1

Standard accessories are subject to change without notice.

OPTIONAL ACCESSORIES (sold separately)

1. Drilling anchor holes (rotation + striking)

○Drill bit (Slender shaft)

Drill bit (Slender shaft)

Adapter for slender shaft (SDS-plus shank)

Line drawing of a manual drill bit with handle and screwdriver (no text or symbols)

Drill bit (slender shaft)
Outer diameter Effective length Overall length
3.4 mm	45 mm 90 mm
3.5 mm

○Drill bit (Taper shank) and taper shank adapter

Drill bit (Taper shank)

Taper shank adapter (SDS-plus shank)

Line drawing of a manual electric drill with handle and screwdriver (no text or symbols)

Cotter

Outer diameter

11.0 mm

12.3 mm

12.7 mm

14.3 mm

14.5 mm

17.5 mm

21.5 mm

Taper mode	Applicable drill bit
Morse taper (No.1)	Drill bit (taper shank)	11.0 ~ 17.5 mm
Morse taper (No.2)	Drill bit (taper shank)	21.5 mm
A-taper	Taper shank adapter formed A-taper or B-taper is provided as an optional accessory, but the drill bit for it is not provided.
B-taper

○13 mm Hammer drill chuck

For drilling operations when using a straight shank bit for impact drilling with a hammer drill.

(Straight shank bit) for impact drill

13 mm Hammer drill chuck (SDS-plus shank)

2. Anchor setting

○Anchor setting adapter (for electric hammer drill)

Anchor setting adapter (SDS-plus shank) (for electric hammer drill) Overall length: 160, 260 mm

Anchor size

W1/4"

W5/16"

W3/8"

Line drawing of a drill bit with handle and screwdriver (no text or symbols)

○Anchor setting adapter (for manual hammer)

Anchor size

W1/4"

W5/16"

W3/8"

W1/2"

W5/8"

3. Large hole boring (rotation + striking)

○Center pin, core bit, core bit shank and guide plate.

Center pin Core bit (outer diameter) Core bit shank
-	(A)	25 mm29 mm	(A)
Center pin (A) 35 mm		32 mm Core bit shank38 mm
Center pin (B) (B)		45 mm50 mm	Core bit shank (B)
Do not use core bits with with outer diameter of 25 mm and 29 mm. with outer diameter of 25 mm and 29 mm.)

4. Crushing operation (rotation + striking)

Bull point (Round type only) (SDS-plus shank)

Three crossed pencils symbolizing prohibition (no text or labels)

• 

Line drawing of a manual drill bit with handle and screwdriver (no text or symbols)

5. Bolt placing operation with Chemical Anchor. (rotation + striking)

(Standard socket) on the market

(SDS-plus shank) 12.7 mm Chemical Anchor Adapter 19 mm Chemical Anchor Adapter

Line drawing of a manual drill bit with handle and screwdriver (no text or symbols)

6. Drilling holes and driving screws (rotation only)

○Drill chuck, chuck adapter (G), special screw and chuck wrench

Line drawing of a manual drill bit with handle and screwdriver (no text or symbols)

7. Drilling holes (rotation only)

Drill chuck (13VLA)

Chuck adapter (D) (SDS Plus shank)

Line drawing of a manual drill bit with handle and screwdriver (no text or symbols)

Chuck wrench

☐ 13 mm drill chuck ass'y (includes chuck wrench) and chuck (for drilling in steel or wood).

8. Driving Screws (rotation only)

Bit No.

Chuck adapter (D) (SDS-plus shank)

Line drawing of a manual drill bit with handle and screwdriver (no text or symbols)

Bit No. Screw Size Length
No. 2 3 – 5 mm 25 mm
No. 3 6 – 8 mm 25 mm

9. Dust cup, Dust collector (B)

Dust cup

Dust collector (B)

10. Hammer grease A

500 g (in a can)

70 g (in a green tube)

30 g (in a green tube)

Optional accessories are subject to change without notice.

APPLICATIONS

Rotation and striking function

○Drilling anchor holes

○Drilling holes in concrete

○Drilling holes in tile

Rotation only function

○Drilling in steel or wood

(with optional accessories)

○Tightening machine screws, wood screws

(with optional accessories)

PRIOR TO OPERATION

1. Power source

Ensure that the power source to be utilized conforms to the power requirements specified on the product nameplate.

2. Power switch

Ensure that the power switch is in the OFF position. If the plug is connected to a receptacle while the power switch is in the ON position, the power tool will start operating immediately, which could cause a serious accident.

3. Extension cord

When the work area is removed from the power source, use an extension cord of sufficient thickness and rated capacity. The extension cord should be kept as short as practicable.

4. Mounting the drill bit (Fig. 1)

(1) To attach a drill bit (SDS-plus shank), fully pull the grip in the direction of the arrow as shown in Fig. 1 and insert the drill bit as far as it will go while manually turning.

(2) By releasing the grip, the drill bit will be secured.

(3) To remove the drill bit, fully pull the grip in the direction of the arrow and pull out the drill bit.

5. Installation of dust cup or dust collector (B) (Optional accessories) (Fig. 2, Fig. 3)

When using a rotary hammer or upward drilling operations attach a dust cup or dust collector (B) to collect dust or particles for easy operation.

○Installing the dust cup

Use the dust cup by attaching to the drill bit as shown in Fig. 2.

When using a bit which has big diameter, enlarge the center hole of the dust cup with this rotary hammer.

○Installing dust collector (B)

When using dust collector (B), insert dust collector (B) from the tip of the bit by aligning it to the groove on the grip. (Fig. 3)

CAUTION:

○The dust cup and dust collector (B) are for exclusive use of concrete drilling work. Do not use them for wood or metal drilling work.

○Insert dust collector (B) completely into the chuck part of the main unit.

When turning the rotary hammer on while dust collector (B) is detached from a concrete surface, dust collector (B) will rotate together with the drill bit. Make sure to turn on the switch after pressing the dust cup on the concrete surface. (When using dust collector (B) attached to a drill bit that has more than 190 mm of overall length, dust collector (B) cannot touch the concrete surface and will rotate. Therefore please use

dust collector (B) by attaching to drill bits which have 166 mm, 160 mm, and 110 mm overall length.

○Dump particles after every two or three holes when drilling.

○Please replace the drill bit after removing dust collector (B).

6. Selecting the driver bit

Screw heads or bits will be damaged unless a bit appropriate for the screw diameter is employed to drive in the screws.

7. Confirm the direction of bit rotation (Fig. 4)

The bit rotates clocwise (viewed from the rear side) by pushing the R-side of the reversing switch lever. The L-side of the lever is pushed to turn the bit counterclockwise.

HOW TO USE

CAUTION:

To prevent accidents, make sure to turn the switch off and disconnect the plug from the receptacle when the drill pits and other various parts are installed or removed. The power switch should also be turned off during a work break and after work.

1. Switch operation

(1) DH24PA

By pulling the trigger switch and depressing the stopper, the switch is held in the ON position for continuous operation. To turn the drill OFF, pull the trigger switch again and release.

(2) DH24PB

The rotation speed of the drill bit can be controlled steplessly by varying the amount that the trigger switch is pulled. Speed is low when the trigger switch is pulled slightly and increases as the switch is pulled more. Continuous operation may be attained by pulling the trigger switch and depressing the stopper. To turn the switch OFF, pull the trigger switch again to disengage the stopper, and release the trigger switch to its original position.

2. Rotation + striking

This rotary hammer can be set to rotation and striking mode by turning the change lever fully counterclockwise to the T mark. (Fig. 5)

(1) Mount the drill bit.

(2) Pull the trigger switch after applying the drill bit tip to the drilling position. (Fig. 6)

(3) Pushing the rotary hammer forcibly is not necessary at all. Pushing slightly so that drill dust comes out gradually is sufficient.

CAUTION:

When the drill bit touches construction iron bar, the bit will stop immediately and the rotary hammer will react to revolve. Therefore grip the side handle and handle tightly as shown in Fig. 6.

3. Rotation only

The rotary hammer can be set to rotation only mode by rotating the change lever fully clockwise to the mark. (Fig. 7)

To drill wood or metal material using the drill chuck and chuck adapter (optional accessories), proceed as follows.

Installing drill chuck and chuck adapter: (Fig. 8)

(1) Attach the drill chuck to the chuck adapter.
(2) The part of the SDS-plus shank is the same as the drill bit. Therefore, refer to the item of "Mounting the drill bit" for attaching it.

CAUTIONS:

○Application of force more than necessary will not only expedite the work, but will deteriorate the tip edge of the drill bit and reduce the service life of the rotary hammer in addition.
○Drill bits may snap off while withdrawing the rotary hammer from the drilled hole. For withdrawing, it is important to use a pushing motion.
☐Do not attempt to drill anchor holes or holes in concrete with the machine set in the rotation only function.
○Do not attempt to use the rotary hammer in the rotation and striking function with the drill chuck and chuck adapter attached. This would seriously shorten the service life of every component of the machine.

4. When driving machine screws (Fig. 9)

First, insert the bit into the socket in the end of chuck adapter (D).

Next, mount chuck adapter (D) on the main unit using procedures described in 4 (1), (2), (3), put the tip of the bit in the slots in the head of the screw, grasp the main unit and tighten the screw.

CAUTIONS:

Exercise care not to excessively prolong driving time, otherwise, the screws may be damaged by excessive force.
○Apply the rotary hammer perpendicularly to the screw head when driving the screw; otherwise, the screw head or bit will be damaged, or driving force will not be fully transferred to the screw.
○Do not attempt to use the rotary hammer in the rotation and striking function with the chuck adapter and bit attached.

5. When driving wood screws (Fig. 9)

(1) Selecting a suitable driver bit Employ plus-head screws, if possible, since the driver bit easily slips off the heads of minus-head screws.
(2) Driving in wood screws
○Prior to driving in wood screws, make pilot holes suitable for them in the wooden board. Apply the bit to the screw head grooves and gently drive the screws into the holes.
○After rotating the rotary hammer at low speed for a while until the wood screw is partly driven into the wood, squeeze the trigger more strongly to obtain the optimum driving force.

CAUTION:

Exercise care in preparing a pilot hole suitable for the wood screw taking the hardness of the wood into consideration. Should the hole be excessively small or shallow, requiring much power to drive the screw into it, the thread of the wood screw may sometimes be damaged.

6. Using depth gauge (Fig. 10)

(1) Loosen the knob on the side handle, and insert the depth gauge into the mounting hole on the side handle.
(2) Adjust the depth gauge position according to the depth of the hole and thighten the knob securely.

7. How to use the drill bit (taper shank) and the taper shank adapter

(1) Mount the taper shank adapter to the rotary hammer. (Fig. 11)

(2) Mount the drill bit (taper shank) to the taper shank adapter. (Fig. 11)
(3) Turn the switch ON, and drill a hole in prescribed depth.
(4) To remove the drill bit (taper shank), insert the cotter into the slot of the taper shank adapter and strike the head of the cotter with a hammer supporting on a rests. (Fig. 12)

HOW TO USE THE CORE BIT (FOR LIGHT LOAD)

When boring penetrating large holes use the core bit (for light loads). At that time use with the center pin and the core bit shank provided as optional accessories.

1. Mounting CAUTION

Be sure to turn power OFF and disconnect the plug from the receptacle.

(1) Mount the core bit to the core bit shank. (Fig. 13). Lubricate the thread of the core bit shank to facilitate disassembly.
(2) Mount the core bit to the rotary hammer (Fig. 14).
(3) Insert the center pin into the guide plate until it stops.
(4) Engage the guide plate with the core bit, and turn the guide plate to the left or the right so that it does not fall even if it faces downward. (Fig. 15).

2. How to bore (Fig. 16)

(1) Connect the plug to the power source.
(2) A spring is installed in the center pin.

Push it lightly to the wall or the floor straight.

Connect the core bit tip flush to the surface and start operating.

(3) When boring about 5 mm in depth the position of the hole will be established. Bore after that removing the center pin and the guide plate from core bit.
(4) Application of excessive force will not only expedite the work, but will deteriorate the tip edge of the drill bit, resulting in reduced service life of the rotary hammer.

CAUTION

When removing the center pin and the guide plate, turn OFF the switch and disconnect the plug from the receptacle.

3. Dismounting (Fig. 17)

Remove the core bit shank from the rotary hammer and strike the head of the core bit shank strongly two or three times with a hammer holding the core bit, then the thread becomes loose and the core bit can be removed.

LUBRICATION

Low viscosity grease is applied to this rotary hammer so that it can be used for a long period without replacing the grease. Please contact the nearest service center for grease replacement when any grease is leaking form loosened screw.

Further use of the rotary hammer with lock off grease will cause the machine to seize up reduce the service life.

CAUTION:

A special grease is used with this machine, therefore, the normal performance of the machine may be badly affected by use of other grease. Please be sure to let one of our service agents undertake replacement of the grease.

MAINTENANCE AND INSPECTION

1. Inspecting the drill bits

Since use of a dull tool will cause motor malfunctioning and degraded efficiency, replace the drill bit with new ones or resharpen them without delay when abrasion is noted.

2. Inspecting the mounting screws:

Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. Failure to do so could result in serious hazard.

3. Maintenance of the motor

The motor unit winding is the very heart" of the power tool. Exercise due care to ensure the winding does not become damaged and/or wet with oil or water.

4. Inspecting the carbon brushes (Fig. 18)

The motor employs carbon brushes which are consumable parts. When they become worn to or near "wear limit", it could result in motor trouble. When an auto-stop carbon brush is equipped, the motor will stop automatically.

At that time, replace both carbon brushes with new ones which have the same carbon brush numbers shown in Fig. 18.

In addition, always keep carbon brushes clean and ensure that they slide freely within the brush holders.

5. Replacing a carbon brush (Fig. 19)

○Disassembling

(1) Loosen the three screws on the handle cover, and remove the handle cover.
(2) Lift out the brush holder together with the carbon brush, while being very careful not to forcibly pull the lead wires within the brush holder.
(3) Withdraw the brush terminal, and remove the carbon brush from the brush holder.

○Reassembling

(1) Place a new carbon brush into the brush holder, and connect the brush terminal to the carbon brush.
(2) Return the brush holder and other parts to their original positions, as illustrated in Fig. 19.
(3) Place the lead wire in the specified position. Be very careful not to allow the lead wire to contact the armature or rotating parts of the motor.
(4) Replace the handle cover, while being careful to ensure it does not pinch the lead wire, and secure it firmly with the three screws.

CAUTION

Should the lead wire be pinched by the handle cover or come in contact with the armature or rotating parts of the motor, a serious danger of electric shock to the operator will be created. Exercise extreme caution in disassembling and reassembling the motor, following the above procedures exactly.

Do not attempt to disassemble any parts other than those necessary to effect replacement of the carbon brush.

NOTE:

Due to HITACHI's continuing program of research and development, the specifications herein are subject to change without prior notice.

Information concerning airborne noise and vibration The measured values were determined according to EN50144.

The typical A-weighted sound pressure level: 90 dB (A). The typical sound power level: 103 dB (A).

Wear ear protection.

The typical weighted root mean square acceleration value: 8.0 m/s² .

Item No.	Part Name
1 Front Cao
2 Grip
3 Ball Holder
4 Holder Spring
5 Washer (B)
6 Retaining Ring For D20 Shaft
7 Gear Cover
8 Tapping Screw (W/Flange) D5 × 35
9 O-Ring
10 Spring (H)
11 Steel Ball D3.97
12 O-Ring
13 Change Lever
14 Oil Seal
15 Sleeve
16 Ball Bearing (6904DDPS2L)
17 Retaining Ring For D37 Hole
18 Steel Ball D7.0
19 Steel Ball D5.556
20 Cylinder
21 Second Gear
22 Spring (A)
23 Washer (A)
24 Retaining Ring For D30 Shaft
25 Second Hammer
26 O-Ring (B)
27 O-Ring (FPM810)
28 Striker
29 O-Ring (A)
30 Piston
31 Piston Pin
32 Washer (C)
33 Inner Cover
34 Spring (B)
35 Second Shaft
36 Washer (B)
37 Clutch Spring
38 Clutch
39 O-Ring (A)
40 Reciprocating Bearing
41 First Gerar
42 Spacer

Item No.	Part Name
43	Ball Bearing (626VVMC2ERPS2S)
44	O-Ring (P-22)
45	Ball Bearing (608DDMC2EPS2S)
46	Washer (A)
47	Armature
48	Fan Guide Ass'y
49	Rubber Bushing
50	Stator
51	Internal Wire (A)
52	Internal Wire (B)
53	Ball Bearing (608VVMC2EPS2L)
54	Housing
55	Name Plate
56	Internal Wire (A)
57	Internal Wire (A)
58	Tapping Screw (W/Flange) D4 × 20
59	Handle Cover
60	Speed Control Switch
61	Noise Suppressor
62	Earth Terminal
63	Carbon Brush
64	Brush Holder
65	HITACHI Label
66	Tube (D)
67	Choke Coil (A)
68	Choke Coil (A)
69	Tapping Screw (W/Flange) D4 × 16
70	Cord Clip
71	Cord Armor
72	Cord
73	Dust Packing
501	Case
502	Side Handle
503	Depth Gauge

Parts are subject to possible modification without notice due to improvements.

The drawing and the list are parts structural drawing and parts list of model DH24PB.

For model DH24PA refer to their drawing and the list.

Line drawing of a quill pen in an inkwell (no text or symbols)

Line drawing of a quill pen with inkwell (no text or symbols)

Svenska		Suomi
EF-DEKLARATION BETRÄFFANDE LIKFORMIGHETVi tillkännagiver med eget ansvar att denna produkt överensstämmer med standard eller standardiserat dokument EN50144, EN55014 och EN61000-3 i enlighet med räddirektiven 73/23/E∅S, 89/336/E∅S och 98/37/ EF.Denna deklaration gäller för CE-märkningen på produkten.		EY-ILMOITUS YHDENMUKAISUUDESTAYksinomaisella vastuudella vakuutamme, että tämä tuote vastaa normeja tai normitettuja dokumentteja EN50144, EN55014 ja EN61000-3 yhteisön ohjeiden 73/ 23/ETY, 89/336/ETY ja 98/37/EY mukaisesti.Tämä ilmoitus sovelletaan tuotekohtaiseen CE- merkintään.
Dansk		English
EF-DEKLARATION OM ENSARTETHEDVi erlkærer os fuldstændige ansvarlige for, at dette produkt modsvarer gældende standard eller de standardiserede dokumenter EN50144, EN55014 og EN61000-3 i overensstemmelse med EF-direktiver 73/ 23/E∅F, 89/336/E∅S og 98/37/EF.Denne erklæring qælder produkter, der er mærket med CE.		EC DECLARATION OF CONFORMITYWe declare under our sole responsibility that this product is in conformity with standards or standardized documents EN50144, EN55014 and EN61000-3 in accordance with Council Directives 73/23/EEC, 89/336/ EEC and 98/37/EC.This declaration is applicable to the product affixed CE marking.
Norsk
EF'S ERKLÆRING OM OVERENSSTEMMELSEVierklærerherved at vi påtar oss eneansvaret for at dette produktet er i overensstermmelse med normer eller standardiserte dokumenter EN 50144, EN55014 og EN61000-3 i samsvar med Rådsdirektiver 73/23/E∅S, 89/336/E∅S og 98/37/EF.Denne erklæringen gjelder produktets påklistrede CE- merking.
Representative office in Europe Hitachi Power Tools Europe GmbH Siemensring 34, 47877 Willich 1, F. R. Germany Head office in Japan Hitachi Koki Co., Ltd. Shinagawa Intercity Tower A, 15-1, Konan 2-chome, Minato-ku, Tokyo, Japan		CE 30. 9. 2003H. KatoK. KatoBoard Director

Hitachi Koki Co., Ltd.