DH38MS - Rotary hammer HiKOKI - Free user manual and instructions

Type	Rotary hammer
Brand	HiKOKI
Model	DH38MS
Voltage	220 V~
Power Input	950 W
Drill Capacity (concrete)	38 mm
Core Bit Capacity	105 mm
No Load Speed	620 /min
Full Load Impact Rate	2800 /min
Weight (without cord, side handle)	6.4 kg
Tool Shank Type	SDS max
Standard Accessories	Molded plastic case, side handle
Optional Accessories	Drill bits (taper shank, SDS-plus adapter), core bits, bull point, cold chisel, cutter, scoop, bushing tool, chemical anchor adaptors, drill chuck, chuck adapter, grease
Applications	Drilling holes in concrete, anchor holes, demolishing, chipping, digging, squaring
Operation Modes	Rotation + Hammering, Hammering only, Rotation only (with accessory)
Safety Features	Safety clutch, insulated gripping surfaces, auto-stop carbon brushes
Maintenance	Grease replacement every 6 months, inspect carbon brushes at wear limit 7 mm
Warming Up Required	In cold regions, warm up by running at low load until impact sound heard

Frequently Asked Questions - DH38MS HiKOKI

How do I change the operating mode on the DH38MS rotary hammer?

Turn the selector lever to the desired mode: rotation + hammering for drilling, hammering for chiseling or demolition. Always ensure the motor is completely stopped before switching modes. Push the button to release the lock, turn the lever, then release the button to lock.

How do I install a tool (drill bit or chisel) into the DH38MS?

First, clean and grease the tool shank. Insert the SDS max shank into the front cap until it contacts the innermost end. Pull the grip in the direction of the arrow, push the tool fully, then release the grip to secure it. Always pull the tool to verify it is locked.

What is the maximum drilling capacity of the DH38MS?

The maximum drill bit diameter for concrete is 38 mm. With a core bit, the maximum diameter is 105 mm.

How do I use a core bit with the DH38MS?

Mount the core bit on the core bit shank, then attach the shank to the tool. Insert the center pin into the guide plate and align with the core bit. Press gently to start the hole, then remove the center pin and guide plate after about 5 mm depth. Always disconnect the plug when removing the guide plate.

When should I replace the grease in the DH38MS?

Replace the grease every 6 months of usage. Use Hitachi Electric Hammer Grease A. To replenish, remove the crank cover, wipe old grease, add 60 g of fresh grease, and reinstall the cover securely.

How do I know when to replace the carbon brushes?

The carbon brushes have a wear limit of 7 mm. When they are worn to or near this limit, replace both brushes with the same part numbers. If auto-stop carbon brushes are equipped, the motor will stop automatically when replacement is needed.

What safety precautions should I take when using the DH38MS?

Always wear eye and ear protection. Use the side handle. Hold the tool by insulated gripping surfaces to avoid electric shock if cutting into hidden wiring. Do not touch the bit during or after operation as it becomes very hot. Ensure the work area is free of buried cables.

Can I use the DH38MS for drilling metal or wood?

Yes, with the optional drill chuck and chuck adapter (sold separately), you can use standard twist drills for metal and wood. Switch the selector lever to rotation + hammering and attach the chuck adapter to the drill chuck.

Why does the DH38MS need warming up in cold weather?

In cold regions, the grease lubrication system may require warming up. Position the bit against concrete, turn on the tool, and run it until a hitting sound is produced. Hold the tool firmly with both hands during warm-up.

What type of shank does the DH38MS use?

The DH38MS uses an SDS max shank for drill bits, core bits, chisels, and other accessories. Optional adapters are available for SDS-plus shank bits or taper shank bits.

USER MANUAL DH38MS HiKOKI

Line drawing of a mechanical drill bit with threaded shaft and handle, enclosed in a circular frame (no text or symbols)

保留备用
Keep for future reference

使用说明书

Handling instructions

目次

电动工具通用安全警告 2

电锤使用安全警告....4

符号....4

规格....5

标准附件....5

选购附件（分开销售）....5

用途....7

作业之前....8

使用手提电锤的方法....8

Technical line drawing of a twist drill bit and a cylindrical tool with a hole (no text or symbols)

(1) 钻头 (锥柄)

外径：11，12.3，

12.7, 14.3,

14.5, 17.5 mm

(2) 锥柄附加器

(SDS 最大柄)

Illustration of a hand using a drill bit on a screwdriver (no text or symbols)

图 4
选择杆座

图5

Line drawing of a hand operating a drill bit with a threaded drill bit (no text or symbols)

图 9

使用自钻锚栓进行钻孔和打入作业

1. 使用锥柄附加器时(图 10)

Illustration of a hand using a drill bit with a threaded drill bit (no text or symbols)

图 16

中文

项目号 代码号 使用数 备注

1 331542 1	42 325003 1
2 331541 1	43 360875E 1 220V-230V
3 331540 1	44 331252 1
4 331539 1	45 953174 2 D5×55
5 331538 1	46 340753E 1 220V-230V “47”
6 331537 1	47 930703 2
7 331530 1	48 331251 1 “89, 90”
8 991712 4	49 331210 1 “50-52, 54-62”
9 956996 1 1AS-60	50 331211 1
10 331531 1	51 944109 2 3×3×8
11 331532 1	52 331212 1
12 331524 1	53 313050 1
13 331536 2 D8×20	54 6002DD 1	6002DDCMPS2L
14 313396 1	55 331213 1
15 331525 1	56 331214 1
16 331224 1	57 321281 1
17 321835 1	58 331218 10
18 331225 1	59 331217 10
19 331526 1	60 331215 1
20 331533 1	61 331219 1
21 331534 1	62 629VVM 1 629VVC2PS2L
22 331535 1	63 331220 1
23 331527 1	64 992803 2 M6×20
24 331528 1	65 986940 4 M6×45
25 331529 1	66 ———— 2
26 331234 1	67 994192 6 M5×16
27 331235 1	68 331245 1
28 986104 2	69 878713 1
29 331221 1	70 331523 1
30 326369 1	71 331549 1
31 321285 1	72 939540 1
32 983162 1 M4×12	73 331208 1
33 331545 1	74 948391 1
34 331544 1	75 6203DD 1	6203DDCMPS2L
35 311229 1	76 996363 1 S-40
36 331543 1	77 321274 1
37 873095 1 P-16	78 331209 1
38 331548 1	79 939299 1 M661
39 331546 1	80 331253 1
40 321311 1	81 307947 1 M6×12
41 6201DD 1	6201DDCMPS2L	82 331248 1

中文
项目号 代码号 使用数 备注

83 949556 1 M6
84 331247 1
85 331246 1
86 330209 1
87 945161 2
88 999043 2
89 958900 2
90 938477 2 M5×8
91 982631 1
92 608VVM 1 608VVC2PS2L
93 331254 1
94 331202 1
95 302089 4 D5×20
96 331203 1
97 331204 1
98 330216 1 270L
99 959141 1
100 ———— 1
101 500457Z 1
102 940778 1 D10.7
103 981974 1
104 313093 1
105 938307 1
106 959141 1
107 960266 1
108 984750 2 D4×16
109 331205 1
110 307028 2 D4×25
111 331547 1
112 331550 1
501 331206 1

CONTENTS

GENERAL POWER TOOL SAFETY WARNINGS ....17

ROTARY HAMMER SAFETY WARNINGS ....19

SYMBOL....20

SPECIFICATIONS....20

STANDARD ACCESSORIES 20

OPTIONAL ACCESSORIES (sold separately)....21

APPLICATIONS....23

HOW TO HANDLE A CORE BIT 26

HOW TO REPLACE GREASE 28

MAINTENANCE AND INSPECTION 28

SERVICE PARTS LIST ....30

GENERAL POWER TOOL SAFETY WARNINGS

WARNING

Read all safety warnings and all instructions.

Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.

Save all warnings and instructions for future reference.

The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.

1) Work area safety

a) Keep work area clean and well lit.

Cluttered or dark areas invite accidents.

b) Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust.

Power tools create sparks which may ignite the dust or fumes.

c) Keep children and bystanders away while operating a power tool.

Distractions can cause you to lose control.

2) Electrical safety

a) Power tool plugs must match the outlet.

Never modify the plug in any way.

Do not use any adapter plugs with earthed (grounded) power tools.

Unmodified plugs and matching outlets will reduce risk of electric shock.

English

b) Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators.

There is an increased risk of electric shock if your body is earthed or grounded.

c) Do not expose power tools to rain or wet conditions.

Water entering a power tool will increase the risk of electric shock.

d) Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool.

Keep cord away from heat, oil, sharp edges or moving parts.

Damaged or entangled cords increase the risk of electric shock.

e) When operating a power tool outdoors, use an extension cord suitable for outdoor use.

Use of a cord suitable for outdoor use reduces the risk of electric shock.

f) If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply.

Use of an RCD reduces the risk of electric shock.

3) Personal safety

a) Stay alert, watch what you are doing and use common sense when operating a power tool.

Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication.

A moment of inattention while operating power tools may result in serious personal injury.

b) Use personal protective equipment. Always wear eye protection.

Protective equipment such as dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.

c) Prevent unintentional starting. Ensure the switch is in the off position before connecting to power source and/or battery pack, picking up or carrying the tool.

Carrying power tools with your finger on the switch or energising power tools that have the switch on invites accidents.

d) Remove any adjusting key or wrench before turning the power tool on.

A wrench or a key left attached to a rotating part of the power tool may result in personal injury.

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

This enables better control of the power tool in unexpected situations.

f) Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving parts.

Loose clothes, jewellery or long hair can be caught in moving parts.

g) If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used.

Use of dust collection can reduce dust-related hazards.

4) Power tool use and care

a) Do not force the power tool. Use the correct power tool for your application.

The correct power tool will do the job better and safer at the rate for which it was designed.

b) Do not use the power tool if the switch does not turn it on and off.

Any power tool that cannot be controlled with the switch is dangerous and must be repaired.

c) Disconnect the plug from the power source and/or the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools.

Such preventive safety measures reduce the risk of starting the power tool accidentally.

d) Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool.

Power tools are dangerous in the hands of untrained users.

e) Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool's operation.

If damaged, have the power tool repaired before use.

Many accidents are caused by poorly maintained power tools.

f) Keep cutting tools sharp and clean.

Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.

g) Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed.

Use of the power tool for operations different from those intended could result in a hazardous situation.

5) Service

a) Have your power tool serviced by a qualified repair person using only identical replacement parts.

This will ensure that the safety of the power tool is maintained.

CAUTION

Keep children and infi rm persons away.

When not in use, tools should be stored out of reach of children and infirm persons.

ROTARY HAMMER SAFETY WARNINGS

1. Wear ear protectors

Exposure to noise can cause hearing loss.

1. Use auxiliary handles supplied with the tool.

Loss of control can cause personal injury.

1. Hold power tool by insulated gripping surfaces, when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock.

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

English

1. 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.
2. 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.
3. Do not touch the metal parts of machine when operating. Earthing metal parts of running tool affects the performance of radio noise suppression of machine.
4. Wear a dust mask

Do not inhale the harmful dusts generated in drilling or chiseling operation. The dust can endanger the health of yourself and bystanders.

SYMBOL

WARNING

The following show symbols used for the machine. Be sure that you understand their meaning before use.

To reduce the risk of injury, user must read instruction manual.

SPECIFICATIONS

Voltage 220 V	~
Power input 950 W
Capacity	Drill bit: 38 mmCore bit: 105 mm
No load speed 620 /min
Full-load impact rate 2800 /min
Weight (without cord, side handle) 6.4 kg

STANDARD ACCESSORIES

In addition to the main unit (1 unit), the package contains the accessories listed in the below.

Case (Molded plastic)		1
Side Handle		1

OPTIONAL ACCESSORIES (sold separately)

1. Through-hole drilling (Rotation + Hammering)

(1) Drill bit (SDS max shank)

Outer diameter (mm)	Overall length (mm)	Outer diameter (mm)	Overall length (mm)
16	340, 540	28	370, 57019 32
22	320, 520	38
25

2. Anchor hole drilling (Rotation + Hammering)

(1) Drill bit (taper shank)

External dia.: 11, 12.3, 12.7, 14.3, 14.5, 17.5 mm

(2) Taper shank adapter

(SDS max shank)

Taper shank adapter Application drill bit
Morse taper (No. 1)	Drill bit (taper shank)11, 12.3, 12.7, 14.3, 14.5, 17.5 mm

Adapter for SDS-plus shank bit

(1) Drill bit (SDS-plus shank)

(2) Adapter for SDS-plus shank bit (SDS max shank)

3. Large dia. hole boring (Rotation + Striking)

(2) Core bit (3) Core bit shank(Guide plate) (1) Center

(1) Center pin

● Applied to core bits from 38 mm to 105 mm
● Applied to core bits 32 mm and 35 mm

NOTE

Do not use core bits 25 mm or 29 mm.

(2) Core bit

● External dia. 25, 29, 32, 35, 38, 45, 54, 64, 79, 94, 105 mm (with guide plate, not applicable to cores 25 mm or 29 mm)

English

(3) Core bit shank

● Applied to core bits above 38 mm
● Applied to core bits below 35 mm

1. Drilling holes ...... For drilling metal and wooden materials

13 mm drill chuck (13VLA)

Chuck adapter (SDS max shank)

Chuck wrench

1. Bolt placing operation with Chemical Anchor. (Rotation + Hammering)

(Standard socket on the market)

(SDS max shank)

12.7 mm Chemical Anchor Adaptor

19 mm Chemical Anchor Adaptor

1. Crushing (Hammering) 7. Groove digging and edging (Hammering)

(1) Bull point

Overall length: 280, 400 mm

(1) Cold chisel

Overall length: 280, 400 mm

1. Asphalt cutting (Hammering) 9. Scooping Work (Hammering)

(1)
Cutter

(1)
Scoop

1. Surface Roughing (Hammering) 11. Tamping (Hammering)

(1) Bushing Tool

(2) Shank

+

(2) Shank

1. Syringe (for chip removal) 13.

Two types of medical or laboratory instruments: a long rod with a bulb-like tip and a coiled spring-like tool (no text or symbols)

Hammer grease A

500 g (in a can)

70 g (in a green tube)

30 g (in a green tube)

APPLICATIONS

○ Drilling holes in concrete
○ Drilling anchor holes
○ Demolishing concrete, chipping, digging, and squaring (by applying 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.

1. Power switch

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

1. 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.

1. How to install tool

NOTE

For tools such as a bull point and a cold chisel, use only Hitachi genuine parts.

(1) Clean, then smear the tool shank with the grease or machine oil (Fig. 1).
(2) To attach the tool (SDS max shank), insert it into the hole until it contacts the innermost end of the hole as illustrated in Fig. 2.

If you continue to turn the tool with slight pressure, you can feel a spot where there is a hitch. At that spot, pull the grip to the direction of an arrow mark and insert the tool all the way until it hits the innermost end.

Releasing the grip reverts the grip and secures the tool in place.

(3) Pull the tool to make sure it is locked completely.
(4) To remove the tool, fully pull the grip in the direction of the arrow and pull out the tool.

Grease or machine oil

Fig. 1

Fig. 2

HOW TO USE THE ROTARY HAMMER

NOTE

Ensure that the wing bolt in the side handle is properly tightened before using the tool.

1. How to drill holes (Fig. 3)
   (1) Pull the switch trigger after applying the drill bit tip to the drilling position.

Fig. 3

English

(2) It is unnecessary to forcibly press the rotary hammer main body. It is sufficient to slightly press the rotary hammer to an extent that shavings are freely discharged.

CAUTION

Although this machine is equipped with a safety clutch, if the drill bit becomes bound in concrete or other material, the resultant stoppage of the drill bit could cause the machine body to turn in reaction. Ensure that the main handle and side handle are gripped firmly during operation.

1. How to chisel or demolish (Fig. 4)

By applying the drill bit tip to the chiseling or demolishing position, operate the rotary hammer by utilizing its empty weight.

Forcible pressing or thrusting is unnecessary.

1. When drilling at "rotation + hammering":

CAUTION

If you switch the selector lever during motor rotation, the tool can start to rotate abruptly, resulting in unexpected accidents. Be sure to switch the selector lever when the motor is at a complete stop.

(1) Switching to "rotation + hammering"

(a) Push the button, release lock and turn the selector lever clockwise.

(b) Align ▲ of the selector lever and for the lever holder as illustrated in Fig. 5.

(c) Release the button to lock the selector lever.

NOTE

Turn the selector lever (do not push the button) to check if it is completely locked and make sure that it does not turn.

1. When demolishing and chiseling at "hammering":

CAUTION

○ If the selector lever is switched during motor rotation, the tool can start to rotate abruptly, resulting in unexpected accidents. Make sure to switch the selector lever when the motor is at a complete stop.

○ If the bull point or cold chisel is used at the position of “rotation + hammering”, the tool can start to rotate, resulting in unexpected accidents. Make sure that they are used at the position of “hammering”.

(1) Switching to "hammering"

(a) Push the button, release lock and turn the selector lever counterclockwise.

(b) Align ▲ of the selector lever and ▶ of the lever holder as illustrated in Fig. 6.

Illustration of a hand using a drill bit on a tool (no text or symbols visible)

Fig. 4

Fig. 5

Selector lever
Lever holder

Fig. 6

(c) Release the button to lock the selector lever.

NOTE

Turn the selector lever (do not push the button) to check if it is completely locked and make sure that it does not turn.

(2) When fixing working positions of tools such as cold chisel, etc.,

(a) Push the button, release lock and turn the selector lever. Align ▲ of the selector lever and @ of the lever holder as illustrated in Fig. 7.

(b) Release the button to lock the selector lever.

(c) Turn the grip as illustrated in Fig. 8 and fix the tool to the desired working direction.

(d) Switch the selector lever to "hammering" according to the procedures mentioned in the above item (1) and secure the position of the tool.

1. Warming up (Fig. 9)

The grease lubrication system in this unit may require warming up in cold regions.

Position the end of the bit so makes contact with the concrete, turn on the switch and perform the warming up operation. Make sure that a hitting sound is produced and then use the unit.

CAUTION

When the warming up operation is performed, hold the side handle and the main body securely with both hands to maintain a secure grip and be careful not to twist your body by the jammed drill bit.

Button Lever holder

Technical line drawing of a mechanical component with no visible text or symbols

Selector lever

Fig. 7

Fig. 8

Line drawing of a hand operating a drill bit with a screwdriver (no text or symbols)

Fig. 9

DRILLING AND DRIVING-IN OPERATIONS FOR ANCHORS

1. When a taper shank adapter is used. (Fig. 10)

(1) Install drill bit with taper shank in the taper shank adapter.
(2) Turn the power on and drill a base hole to the depth sounded by indicating groove on the drill bit.
(3) After cleaning out dust with a syringe, attach the plug to the anchor tip and drive in the anchor with a manual hammer.

Taper shank adapter

Drill bit (taper shank)

Indicating groove shows standard depth matching the outside diameter of the anchor for drilling.

Fig. 10

English

(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 manual hammer supporting on a rest. (Fig. 11)

Fig. 11

USING DRILL CHUCK, CHUCK ADAPTER

Note that this machine can be used at “rotation only” if separately sold parts such as drill chuck and chuck adapter are attached. Use it with the selector lever positioned at “rotation + hammering”.

CAUTION

During operation, be sure to grip the handle and the side handle firmly to prevent your body from swaying.

(1) Switching to "rotation + hammering"

For switching to "rotation + hammering", follow the same procedures mentioned in

[3. When drilling at "rotation + hammering"] in page 24.

(2) Attaching chuck adapter to drill chuck (Fig. 12)

(a) Attach the chuck adapter to the drill chuck.
(b) The SDS max shank of the chuck adapter is equivalent to the drill bit. Therefore, follow the same procedure as [How to install tool] in page 23 for attaching and detaching.

(3) Drilling

(a) Even if you apply more-than-required pressure to the machine body, drilling can never be performed as quickly as you expect. Applying more force or pressure to the machine body than what is needed, on the contrary, damages the drill tip, resulting in the declined working efficiency and shortened life of this machine.
(b) A drill can snap sometimes when drilling is almost finished. It is important to relax your thrusting pressure when drilling is nearing the end.

Fig. 12

HOW TO HANDLE A CORE BIT

When a core bit is used, large diameter holes and blind holes can be drilled. In this case, use optional accessories for core bits (such as a center pin and core bit shank) for more efficient operation.

1. Mounting

CAUTION

Prior to mounting a core bit, always disconnect the plug from the power supply receptacle.

(1) Mount the core bit on the core bit shank. (Fig. 13)

Before that, feed oil to the screw portion of core bit shank for easy dismounting.

(2) Mount the core bit shank on the main body in the same manner as in mounting the drill bit and the bull point. (Fig. 14)
(3) Insert the center pin into the guide plate until it reaches the extremity.
(4) Fit in the guide plate by aligning its concaved portion with the core bit tip. When the position of the concave is shifted by turning the guide plate right or left, the guide plate never slips off even when the drill is used in a downward direction. (Fig. 15)

1. Drilling holes

(1) Insert the plug into a receptacle.
(2) A spring is built in the center pin. By straightly and gently pressing it to the wall or floor surface, the entire surface of the core bit tip attains contact to start the hole drilling job. (Fig. 16)
(3) When the hole depth reaches approximately 5 mm, the hole position can be determined. Then remove the center pin and guide plate from the core bit and continue the hole drilling job.

CAUTION

When removing the center pin and guide plate, always disconnect the plug from the receptacle.

1. How to dismount the core bit

By holding the rotary hammer (with the core bit inserted) in an upward position, drive the rotary hammer to repeat impact operation two or three times, whereby the screw is loosened and the rotary hammer becomes ready for disassembly. (Fig. 17)
○ Remove the core bit shank from the rotary hammer, hold the core bit with one hand, and strongly strike the head of the SDS max shank portion of the core bit shank with a manual hammer two or three times, whereby the round head screw is loosened and the rotary hammer is ready for disassembly. (Fig. 18)

Fig. 14Fig. 13

Fig. 15

Line drawing of a hand using a drill bit with a threaded drill bit (no text or symbols)

Fig. 16

Fig. 17

Fig. 18

HOW TO REPLACE GREASE

This machine is of full air-tight construction to protect against dust and to prevent lubricant leakage. Therefore, the machine can be used without lubrication for long periods. Replace the grease as described below.

1. Grease replacement period

After purchase, replace grease after every 6 months of usage. Ask for grease replacement at the nearest Hitachi authorized Service center. Proceed for replacement of grease.

1. Grease replenishment

CAUTION

Before replenishing the grease, turn the power off and pull out the power plug.

(1) Remove the crank cover and wipe off the grease inside. (Fig. 19)
(2) Supply 60g of Hitachi Electric Hammer Grease A (Standard accessory, contained in tube) to the crank case.
(3) After replenishing the grease, install the crank cover securely.

NOTE

The Hitachi Electric Hammer Grease A is of the low viscosity type. If necessary purchase from an Hitachi authorized Service center.

Fig. 19

MAINTENANCE AND INSPECTION

1. Inspecting the tool

Since use of a dull tool will degrade efficiency and cause possible motor malfunction, sharpen or replace the tool as soon as abrasion is noted.

1. 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.

1. 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.

1. Inspecting the carbon brushes (Fig. 20)

The Motor employs carbon brushes which are consumable parts. When they become worn to or near the “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 the figure. In addition, always keep carbon brushes clean and ensure that they slide freely w

Fig. 20

5. Replacing carbon brushes

Loosen the two set screws and remove the tail cover. Remove the brush caps and carbon brushes. After replacing the carbon brushes, tighten the brush caps securely and install the tail cover with securely tightening two set screws.

6. Service parts list

CAUTION

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

● Power supply cable

In case you need replacing of power supply cable, use the heavy polychloroprene sheathed fl exible cable 245IEC66 (YCW) or equivalent.

SERVICE PARTS LIST

Item No.	Code No.	No. Used	Remarks
1	331542	1
2	331541	1
3	331540	1
4	331539	1
5	331538	1
6	331537	1
7	331530	1
8	991712	4
9	956996	1	1AS-60
10	331531	1
11	331532	1
12	331524	1
13	331536	2	D8×20
14	313396	1
15	331525	1
16	331224	1
17	321835	1
18	331225	1
19	331526	1
20	331533	1
21	331534	1
22	331535	1
23	331527	1
24	331528	1
25	331529	1
26	331234	1
27	331235	1
28	986104	2
29	331221	1
30	326369	1
31	321285	1
32	983162	1	M4×12
33	331545	1
34	331544	1
35	311229	1
36	331543	1
37	873095	1	P-16
38	331548	1
39	331546	1
40	321311	1

Item No.	Code No.	No. Used	Remarks
41	6201DD 1	6201DDCMPS2L
42	325003	1
43	360875E	1 220V-230V
44	331252	1
45	953174	2 D5×55
46	340753E	1 220V-230V “47”
47	930703	2
48	331251	1 “89, 90”
49	331210	1 “50-52, 54-62”
50	331211	1
51	944109	2 3×3×8
52	331212	1
53	313050	1
54	6002DD	1 6002DDCMPS2L
55	331213	1
56	331214	1
57	321281	1
58	331218	10
59	331217	10
60	331215	1
61	331219	1
62	629VVM	1 629VVC2PS2L
63	331220	1
64	992803	2 M6×20
65	986940	4 M6×45
66	———	2
67	994192	6 M5×16
68	331245	1
69	878713	1
70	331523	1
71	331549	1
72	939540	1
73	331208	1
74	948391	1
75	6203DD	1 6203DDCMPS2L
76	996363	1 S-40
77	321274	1
78	331209	1
79	939299	1 M661
80	331253	1

English

Item No.	Code No.	No. Used	Remarks
81	307947	1 M6×12
82	331248	1
83	949556	1 M6
84	331247	1
85	331246	1
86	330209	1
87	945161	2
88	999043	2
89	958900	2
90	938477	2 M5×8
91	982631	1
92	608VVM	1 608VVC2PS2L
93	331254	1
94	331202	1
95	302089	4 D5×20
96	331203	1
97	331204	1
98	330216	1 270L
99	959141	1
100 ————	1
101	500457Z	1
102	940778	1 D10.7
103	981974	1
104	313093	1
105	938307	1
106	959141	1
107	960266	1
108	984750	2 D4×16
109	331205	1
110	307028	2 D4×25
111	331547	1
112	331550	1
501	331206	1

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

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)

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