Hitachi H 60MR Technical Data And Service Manual

Brand: Hitachi

Model: H 60MR

Category: Rotary hammers

Type: Technical Data And Service Manual

This manual is also suitable for

H 60MRV

Hitachi H 60MR is a high-performance demolition hammer designed for heavy-duty tasks. It features a sturdy aluminum frame for durability and double-insulation construction for safety. The H 60MR delivers 26.0 J of impact energy for efficient chipping and demolishing, with low vibration and noise levels. It has a soft-touch grip for comfortable handling and a D-type side handle with 360° rotation and adjustable positioning for added convenience.

TECHNICAL DATA

AND

SERVICE MANUAL

DEMOLITION HAMMER

H 60MR

H 60MRV

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

LIST Nos. H 60MR: E483

H 60MRV: E484

Mar. 2005

MODELS

H 60MR

H 60MRV

Hitachi



Power Tools

REMARK:

Throughout this TECHNICAL DATA AND SERVICE MANUAL, symbols are

used in the place of company names and model names of our

competitors. The symbols utilized here are as follows:

Symbols Utilized

Competitors

Company Name

Model Name

BOSCH

GSH11E

MAKITA

HM1202C

CONTENTS

Page

1. PRODUCT NAME .............................................................................................................................. 1

2. MARKETING OBJECTIVE ................................................................................................................ 1

3. APPLICATIONS ................................................................................................................................. 1

4. SELLING POINTS ............................................................................................................................. 1

4-1. Selling Point Descriptions ...................................................................................................................2

5. SPECIFICATIONS ............................................................................................................................. 3

5-1. Optional Accessories ..........................................................................................................................4

6. COMPARISON WITH SIMILAR PRODUCTS ................................................................................... 6

6-1. Specification Comparison ...................................................................................................................6

6-2. Demolition Performance Comparison .................................................................................................6

6-3. Full-load Vibration Level Comparison .................................................................................................7

6-4. Full-load and No-load Noise Level Comparison .................................................................................7

7. PRECAUTIONS IN SALES PROMOTION ........................................................................................ 8

7-1. Handling Instructions ..........................................................................................................................8

7-2. Caution Plate ......................................................................................................................................8

7-3. Grease Replacement ..........................................................................................................................8

7-4. O-ring Replacement ............................................................................................................................9

8. REFERENCE INFORMATION ........................................................................................................... 9

8-1. Striking Operation ...............................................................................................................................9

8-2. Idling-proof Mechanism ....................................................................................................................10

8-3. Shock-absorbing Mechanism ...........................................................................................................10

8-4. Sealed and Dustproof Construction .................................................................................................. 11

8-5. Vibration Absorbing Construction ..................................................................................................... 11

8-6. Tool Retainer .....................................................................................................................................12

8-7. Adjusting Mechanism for the Tool Swivel Angle ................................................................................12

8-8. Side Handle ...................................................................................................................................... 12

9. REPAIR GUIDE ............................................................................................................................... 13

9-1. Precautions and Suggestions for Disassembly and Reassembly of the Main Body ......................... 13

10. STANDARD REPAIR TIME (UNIT) SCHEDULES ........................................................................ 21

Assembly Diagram for H 60MR

Assembly Diagram for H 60MRV

--- 1 ---

1. PRODUCT NAME

Hitachi Demolition Hammer, Model H 60MR

Model H 60MRV

2. MARKETING OBJECTIVE

The Models H 60MR and H 60MRV are upgraded versions of the current Models H 60MA and H 60MB which

feature the use of maker B's SDS-max shank tools. The performance, durability and operability are greatly

improved. With these new Models H 60MR and H 60MRV and also the current Model H 45MR, we aim to

enhance the share of our hammer series having internal double-insulation construction with sturdy aluminum

frame.

The main specifications are as follows:

(1) High chipping and demolishing performance with low vibration and noise level

(2) Internal double-insulation construction with sturdy aluminum frame

(3) Soft-touch grip for easier handling

(4) D-type side handle with adjustable mechanism for 360û rotation plus positioning from front to rear

(5) Shock-absorbing mechanism results in prolonged service life.

(6) Simply turning method, variable lock mechanism for easy working-angle adjustment of chisels, etc.

(7) Constant speed and variable speed control (Model H 60MRV only)

(8) A very original design

3. APPLICATIONS

Demolishing and chiseling of concrete

Edging, gravel road digging, compacting and tamping, grooving, cutting, stripping and roughing, etc.

4. SELLING POINTS

High chipping and demolishing performance with low vibration and noise level

A very original design

Shock-absorbing mechanism

results in prolonged service life

Hitachi original design

vibration-abosorbing handle for

excellent vibration reduction

Constant speed and

variable speed control

(Model H 60MRV only)

Internal double-insulation construction

with sturdy aliminum frame

D-type side handle with adjustable

mechanism for 360û rotation plus

positioning from front to rear

Simply trurning method, variable lock

mehcanism for easy working-angle

adjustment of chisels, etc.

Large trigger switch for

comfortable operation

Soft-touch grip for

easier handling

--- 2 ---

4-1. Selling Point Descriptions

4-1-1. High chipping and demolishing performance with low vibration and noise level

Demolition performance is 1.0 to 1.2 times higher than that of similar products thanks to the maximum 26.0 J

impact energy and efficient striking. The demolition performance is 1.0 to 1.2 times higher than that of similar

products. Even so, the Models H 60MR and H 60MRV produce equivalent or lower vibration and noise level than

that of similar products.

HITACHI

H 60MRV

HITACHI

H 60MR

Ratio of demolished weight %

Full-load vibration level dB (VL)

Full-load noise level dB (A)

No-load noise level dB (A)

100

121.5

91.5

83.0 81.0

Maker

Model

HITACHI

H 60MB

HITACHI

H 60MA

122.5

94.0

84.0 82.0

122.5

94.0

83.0

123.0

94.5

80.0

4-1-2. Internal double-insulation construction with sturdy aluminium frame

The aluminum die-cast outer frame is very sturdy (highly rigid). In addition, a plastic internal stator holder is

adopted to realize double-insulation construction. Thus the housing has greater rigidity and the double-insulated

motor has greater durability. The Models H 60MR and H 60MRV are heavy-duty and the service life of the carbon

brushes is prolonged, minimizing disconnection of the armature, deviation of the core and grease leakage.

4-1-3. Soft-touch grip for easier handling

The double-layer molded handle consists of a nylon resin base covered with a soft plastic layer to ensure a soft

touch and firm, non-slip grip of the handles.

4-1-4. D-type side handle with adjustable mechanism for 360û rotation plus positioning from front to rear

The D-type side handle can be adjusted by 360û rotation and also allows convenient operation from front to rear.

This side handle has a two-layer plastic construction (integral molding) made of nylon resin as the base and soft

resin around it for a comfortable cushion grip.

4-1-5. Shock absorbing mechanism results in prolonged service life

At the instance of releasing the tool from the workpiece by moving the main body up, the cushion (damper (B))

between hammer holder (B) and the front cover absorbs the striking force of the second hammer. In addition, the

cushion (damper (C)) between the retainer sleeve and the front cover absorbs the striking force of the tool when it

pops up. Thus the Models H 60MR and H 60MRV have greater durability than the similar products.

4-1-6. Simply turning method, variable lock mechanism for easy working-angle adjustment of chisels, etc.

The tool swivel angle can be easily changed in 12 steps by pushing out grip (B) ahead and then turning grip (A).

4-1-7. Constant speed and variable speed control (Model H 60MRV only)

The Model H 60MRV is equipped with an electronic control circuit for stepless adjustment of striking speed. The

striking speed can be adjusted between 930 to 1,650 times per minute by turning the dial according to the

operation (chipping and demolishing) and the workpiece (Fig. 1). The constant speed control provides excellent

operability. The table below shows the striking speed per minute of each dial setting.

--- 3 ---

Fig. 1

Dial setting

Striking speed/min.

1,650

1,590

1,460

1,320

1,110

930

4-1-8. Original design vibration-absorbing handle (Vibration-absorbing is significantly improved)

Hitachi's original design vibration-absorbing handle minimizes vibration through the rolling and compression of

four cylindrical rubber cushions on inclined surfaces. The spring constant factor is as low as that of the Models

H 41SC, H 45MR, H 45SR, H 45FRV and H 60KA, and the cushioning structure greatly reduces vibration.

Dial

Switch

Type of handles

Power input

Full-load current

Striking speed

Weight

Packaging

Standard accessories

Materials: Aluminum alloy die casting

Nylon resin (Crank cover, crank case cover, back cover, tail cover

and handle)

Paint: Silver green metallic, green gray and black

Trigger switch (with stopper)

D-shaped handle and side handle

1,350 W

11.8 A (120 V), 6.2 A (230 V) 13.6 A (110 V), 12.5 A (120 V),

6.5 A (230 V), 6.3 A (240 V)

No-load: 2,160 min

-1

No-load: 930 to 1,840 min

-1

Full-load: 1,650 min

-1

Full-load: 930 to 1,650 min

-1

Product: 10.5 kg (23.1 lbs.); excluding cord and side handle

Packed: 17.0 kg (37.5 lbs.)

Corrugated cardboard box with plastic tool case

Bull point 280 mm (11-1/32")

••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

1 pc.

Side handle

••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

1 pc.

Hex. bar wrench (for M8)

••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

1 pc.

Plastic tool case

••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

1 pc.

Single-phase AC 50/60 Hz

Item

Power source

Voltage

Motor type

Insulation structure

Enclosure

5. SPECIFICATIONS

AC single-phase series commutator motor

110 V, 120 V, 230 V, 240 V

Double insulation

H 60MR H 60MRV

--- 4 ---

5-1. Optional Accessories

1. Demolishing work

(1) Bull point (SDS-max shank type)

2. Grooving and chiseling work

Code No.

313471

313472

(1) Cold chisel (SDS-max shank type)

3. Cutting and stripping work (asphalt cutting etc.)

(1) Cutter (SDS-max shank type)

4. Digging (substitute pick-ax)

Overall length

280 mm (11-1/32")

400 mm (15-3/4")

Code No.

313473

313474

Overall length

280 mm (11-1/32")

400 mm (15-3/4")

Overall length

400 mm (15-3/4")

Width

50 mm (2")

Code No.

313475

Overall length

400 mm (15-3/4")

Code No.

313476

(1) Scoop (SDS-max shank type)

--- 5 ---

5. Roughing surface work

Overall length

220 mm (8-21/32")

Code No.

313479

(1) Bushing tool

(2) Shank (SDS-max shank type)

Code No.

313477

6. Tamping work

Overall length

220 mm (8-21/32")

Code No.

313479

(1) Rammer

(2) Shank (SDS-max shank type)

Code No.

313478

150 mm x 150 mm

7. Grease for impact drill

500 g (1.1 lbs.) Can

Code No. 980927

70 g (2.5 oz) Tube

Code No. 308471

30 g (1 oz) Tube

Code No. 981840

NOTE: Code numbers listed above are subject to change without notice. Please refer to periodic

Technical News Bulletins.

--- 6 ---

H 60MA

H 60MB

143

169

134

200

100

Demolished amount

(kg/30 min.)

At rated

voltage

230 V

50 Hz

166

H 60MR

H 60MRV

12575

150

175

H 65MR

6. COMPARISON WITH SIMILAR PRODUCTS

6-1. Specification Comparison

Maker

Model name

Power input

Striking energy per stroke

Full-load impact rate

min

-1

HITACHI

1,350

121.5

Weight (without cord and

side handle)

Double insulation

91.5

10.5

(23.1 lbs.)

Full-load vibration level

dB (A)

Insulation structure

Full-load noise level

Dimensions

dB (VL)

H 60MRV

6-2. Demolition Performance Comparison

The data shown in Fig. 2 are obtained in actual factory tests, and are for reference only. Demolished amount may

vary in accordance with operating conditions, operator skill, etc.

dB (A)

No-load noise level

Length

Height

Width

576

(22-43/64")

290

(11-27/64")

121

(4-49/64")

26.0 7.0 to 26.0

83.0 81.0

1,650 930 to 1,650

H 60MA

1,300

122.5

Double insulation

94.0

10.5

(23.1 lbs.)

H 60MB

576

(22-43/64")

280

(11-1/32")

121

(4-49/64")

25.0 6.0 to 25.0

84.0 82.0

1,600 900 to 1,600

6.0 to 25.0

83.0

900 to 1,890

1,500

122.5

94.0

570

(22-7/16")

270

(10-5/8")

118

(4-21/32")

10.1

(22.2 lbs.)

Double

insulation

11.0 to 21.9

80.0

950 to 1,900

1,450

123.0

94.5

578

(22-49/64")

250

(9-27/32")

112

(4-13/32")

9.3

(20.5 lbs.)

Double

insulation

Fig. 2

--- 7 ---

100

HITACHI

H 60MR

HITACHI

H 60MRV

HITACHI

H 60MA

HITACHI

H 60MB

Full-load noise level

No-load noise level

6-3. Full-load Vibration Level Comparison

The graph shown in Fig. 3 illustrates the relationship between handle pressing force and handle vibration level in

the Z direction.

6-4. Full-load and No-load Noise Level Comparison

The graph shown in Fig. 4 illustrates the relationship of the noise levels at actual-load operation and no-load

operation measured 1 m away from the main body.

Fig. 3

Fig. 4

Nosie level (dB (A))

--- 8 ---

7. PRECAUTIONS IN SALES PROMOTION

In the interest of promoting the safest and most efficient use of the Models H 60MR and H 60MRV Demolition

Hammers by all of our customers, it is very important that at the time of sale the salesperson carefully ensures

that the buyer seriously recognizes the importance of the contents of the Handling Instructions, and fully

understands the meaning of the precautions listed on the Caution Plate attached to each tool.

7-1. Handling Instructions

Although every effort is made in each step of design, manufacture and inspection to provide protection against

safety hazards, the dangers inherent in the use of any electric tool cannot be completely eliminated. Accordingly,

general precautions and suggestions for the use of electric power tools, and specific precautions and suggestions

for the use of the Demolition Hammer are listed in the Handling Instructions to enhance the safe, efficient use of

the tool by the customer. Salespersons must be thoroughly familiar with the contents of the Handling Instructions

to be able to offer appropriate guidance to the customer during sales promotion.

7-2. Caution Plate

Each unit of the Models H 60MR and H 60MRV is provided with a Caution Plate (illustrated below) which lists

basic safety precautions in use. Carefully ensure that the customer fully understands and follows these

precautions before using the tool.

For the U.S.A. and Canada

For Australia, New Zealand and India

7-3. Grease Replacement

The striking portion and the speed reduction portion of the Models H 60MR and H 60MRV respectively use

different types of grease. Grease replacement is required if the unit is disassembled for maintenance or O-rings

become damaged and worn as described in 7-4. The striking portion uses special grease. If the striking portion

(inside the cylinder case and crank case) is disassembled, thoroughly remove all of the old grease from each part.

On reassembly, insert 80 g (2.8 oz) of new grease into the crank case (connecting rod side). Do not exceed the

designated amount of grease. Excessive grease insertion may cause reduced striking performance.

The speed reduction portion (inside the gear cover) uses Hitachi Motor Grease No. 29 (Code No. 930035).

The proper supply volume is 40 g (1.4 oz). Never use the striking portion special grease in the speed reduction

portion. Special grease would leak into the motor portion and cause subsequent trouble.

--- 9 ---

7-4. O-ring Replacement

The O-ring (mounted on the striker and piston) are extremely important to ensure adequate sealing of the air

pressure. Although the O-rings are made of special rubber to give them a long service life, they do nonetheless

become worn, and should be replaced by new ones periodically depending on frequency of use of the tool.

With average use, it is recommended that the O-rings be replaced at least every six months to ensure maximum

effectiveness.

Fig. 5

8-1. Striking Operation

The rotation of the armature is transferred to the crank shaft and connecting rod, which in turn cause the piston to

reciprocate inside the cylinder. As the piston reciprocates, the changing air pressure inside the air chamber

between the piston and the striker causes the striker to continuously strike against the end of the second hammer.

At the same time, the air-cushion effect within the air chamber absorbs the impact of the striker. Should the air

escape from the air chamber, the air-cushion effect would cease, and the impact energy would not be absorbed.

Accordingly, the O-rings mounted on the striker and the piston play an extremely important role in sealing the air

within the air chamber.

Second hammer

Armature

Connecting rod

Piston

Crank shaft

O-rings

Air chamber

Striker

Cylinder

Crank cover

8. REFERENCE INFORMATION

Structure:

--- 10 ---

8-2. Idling-proof Mechanism

When the bull point is released from the concrete surface, the second hammer moves to the position illustrated in

Fig. 6, and the striker moves out of striking position. When this occurs, the air holes are opened and the pressure

within the air chamber remains unchanged even though the piston continues to reciprocate, thereby preventing

striking operation.

Fig. 6

Air

chamber

Striker

Second hammer

Forward movement of

second hammer & striker

Air hole

8-3. Shock-absorbing Mechanism

At the instance of releasing the tool from the workpiece by moving the main body up, the second hammer

contacts hammer holder (B) then the cushion (damper (B)) provided between the hammer holder (B) and the front

cover absorbs the striking force of the second hammer. In addition, the tool contacts the needle roller then the

cushion (damper (C)) provided between the retainer sleeve and the front cover absorbs the striking force of the

tool when it pops up. Thus the durability of the Models H 60MR and H 60MRV is increased greatly because the

tool and the second hammer do not strike the tool retainer directly.

Fig. 7

Second hammer Hammer holder (B)Tool

Retainer sleeve

Damper (B)

Damper (C)

Needle roller

--- 11 ---

Fig. 8

Front cover

Vibration absorbing unit

Needle roller

Retainer sleeve

Switch handle

O-ring

Crank case

Tool

O-ring

Housing

Cylinder case

O-ring

Vibration absorbing unit

8-4. Sealed and Dustproof Construction

The cylinder case and the crank case are sealed by five O-rings and an oil seal which serve to prevent leakage of

the grease, as well as to prevent dust and dirt from entering the mechanism.

8-5. Vibration Absorbing Construction

Hitachi original, innovative units which absorb vibration are installed between the switch handle and the crank

case and between the switch handle and the housing. As a result, the amount of vibration transmitted from the

main body to the arms of the operator is considerably less in comparison with conventional hammers.

Construction of vibration absorbing unit:

The main body (crank case and housing) and the

handle are connected through four cylindrical rubbers

(handle dampers). Vibration is absorbed by the rolling

and compression of the four rubbers on inclined

surfaces. Because the vibration absorbing unit has

non-linear spring characteristics, its spring constant

factor is lower than that of the conventional shearing

rubber type vibration-absorbing construction, and it

provides significantly higher efficiency in minimizing

vibration. In addition, the interlocking slotted groove

and the cylindrical convex portions at the center prevent

the handle from being disconnected by twisting or

pulling, a common problem with conventional hammers.

Fig. 9

Oil seal

--- 12 ---

8-6. Tool Retainer

The Models H 60MR and H 60MRV are equipped with a slide-type tool retainer. Tools can be attached and

detached just by pulling grip (A). While pulling grip (A) in A direction, insert the tool in the hole of the front cap

(Fig. 10). Adjust the groove position by turning the tool and push it in to the end. Lock the tool by returning grip

(A) back to the original position.

Fig. 10

Grip (A)

Front cap

Tool shank

8-7. Adjusting Mechanism for the Tool Swivel Angle

The tool swivel angle can be easily changed in 12 steps. The tool swivel angle can be set freely to the desired

position by pushing out grip (B) ahead in A direction and then turning grip (A) in B or C direction. (Fig. 11)

Fig. 11

Grip (A)

Grip (B)

8-8. Side Handle

The side handle can be adjusted by 360û rotation and also allows operation from front to rear. Loosen the handle

by turning the grip in A direction and adjust the handle to a convenient position. Turn the grip in B direction to

fix the side handle. (Fig. 12)

Fig. 12

Grip

--- 13 ---

9. PEPAIR GUIDE

9-1. Precautions and Suggestions for Disassembly and Reassembly of the Main Body

The numbers in [Bold], <Bold> and <<Bold>> correspond to the item numbers in the Parts List and exploded

assembly diagrams.

([Bold]: H 60MR and H 60MRV, <Bold>: H 60MR only, <<Bold>>: H 60MRV only)

Fig. 14

Remove the Ring [3] by means of a snap ring remover, then the Needle Holder [4], two Needle Rollers

D8 x 20 [13] and Spring (A) [5] can be removed from the Retainer Sleeve [14]. Remove the Retaining Ring

D42 [6] by means of a snap ring remover, then the Ball Holder [7], Grip (B) [8] and the four Steel Balls D 6.35

[10] can be removed from the Front Cover [12] (Fig. 14). Furthermore, remove the Seal Lock Hex. Socket Hd.

Bolts M8 x 25 [11] fixing the Front Cover [12], then the Retainer Sleeve [14], Damper (C) [104], Front Cover

[12], Hammer Holder (B) [18], Damper (B) [17], Second Hammer [19], Hammer Holder (A) [20], Damper (A)

[21] and Damper Washer [22] can be removed from the Cylinder Case [24].

Retaining Ring D42 [6]

Needle Holder [4]

Needle Roller

D8 x 20 [13]

9-1-1. Disassembly

Tool retainer disassembly (See Figs. 13 and 14.)

Pull Grip (A) [2] fully in the arrow direction as

shown in Fig. 13 and remove the Front Cap [1]

(since the Front Cap [1] is made of rubber and

engaged firmly with the Retainer Sleeve [14],

pull it strongly to remove). This allows Grip (A)

[2] to be separated from the Retainer Sleeve

[14].

Fig. 13

Front Cap [1]

Grip (A) [2]

Grip (B) [8]

Ball Holder [7]

Steel Ball D6.35 [10]Spring (A) [5]

Front Cover [12]

Ring [3]

Retainer

Sleeve [14]

--- 14 ---

First gear and crank shaft disassembly

Remove the grease from the Connecting Rod [31] side and the First Gear [54] side of the Crank Case [34].

Remove the two Seal Lock Hex. Socket Hd. Bolts M5 x 14 [40] fixing the Bearing Cover [41]. Then place the

Connecting Rod [31] side of the Crank Case [34] downward on a workbench and apply pressure on the end

surface of the Cranck Shaft [38] with a hand press to remove the First Gear [54] and the Crank Shaft [38]

(Fig. 16). Before removing them, make sure that the two Seal Lock Hex. Socket Hd. Bolts M5 x 14 [40] fixing

the Bearing Cover [41] are removed.

Piston and striker disassembly

Remove the Hex. Socket Hd. Bolts M5 x 12 [45] fixing the Crank Case Cover [82] and the Seal Lock Hex.

Socket Hd. Bolts M5 x 16 [36] fixing the Crank Cover [37]. Remove the Crank Case Cover [82] and the Crank

Cover [37] from the Crank Case [34] in order as shown in Fig. 15. Remove the Hex. Socket Hd. Bolts (W/

Flange) M8 x 30 [25] fixing the Cylinder Case [24], and disassemble the Cylinder Case [24] from the Crank

Case [34]. As the Piston [30] remains in the Crank Case [34] side, remove the Retaining Ring for D14 Shaft

[32] to remove the Connecting Rod [31] from the Crank Shaft [38].

The Striker [27] can be removed by tapping the Cylinder Case [24] lightly with a plastic hammer. If it does not

come out easily, push the disassembled Piston [30] with the Connecting Rod [31] back into the cylinder, and

pull them apart again quickly. The Striker [27] can come out at the same time.

Fig. 15

Crank Cover [37]

Crank Case Cover [82]

Crank Case [34]

Fig. 16

Crank Case [34]

Crank Shaft [38]

First Gear [54]

Bearing Cover [41]

Apply pressure on the end surface

of the crank shaft with a hand press.

Workbench

--- 15 ---

9-1-2. Reassembly

Reassembly can be accomplished by following the disassembly procedures in reverse. However, special

attention should be given to the following items.

First gear and crank shaft reassembly

Press-fit the Ball Bearing 6204DDCMPS2L [42] in the Crank Case [34] and fix the Bearing Cover [41] with the

two Seal Lock Hex. Socket Hd. Bolts M5 x 14 [40]. Press-fit the Crank Shaft [38]. Then press-fit Distance

Ring (C) [53] and mount the Oil Seal [52]. Put the Feather Key 3 x 3 x 10 [39] into the groove of the Crank

Shaft [38] and press-fit the First Gear [54] with a suitable tool while holding the flat portion of the Crank Shaft

[38] with a steel bar. Before press-fitting, make sure that the Feather Key 3 x 3 x 10 [39] fits in the key groove

of the First Gear [54]. (Fig. 17)

Fig. 17

Crank Case [34]

Oil Seal [52]

Bearing Cover [41]

First Gear [54]

Feather Key

3 x 3 x 10 [39]

Distance Ring (C) [53]

Seal Lock Hex. Socket

Hd. Bolt M5 x 14 [40]

Ball Bearing

6204DDCMPS2L [42]

Crank Shaft [38]

Steel bar

Damper (C) assembly

Keeping Damper (C) [104] fitted in the groove around the Retainer Sleeve [14], mount the Retainer Sleeve

[14] to the Front Cover [12] (Fig. 18).

Fig. 18

Front Cover [12]

Damper (C) [104]

Retainer Sleeve [14]

Suitable tool

Groove

--- 16 ---

Lubrication

Apply special grease (grease for electric impact drills) to the inner circumference of the Connecting Rod [31],

O-rings (A) (FPM810) [28] in the Striker [27] and in the Piston [30], the outer circumference of the Retainer

Sleeve [14], the sliding portion of the Second Hammer [19], Oil Seal [52], Damper (A) [21], Damper (B) [17],

Damper (C) [104], Damper Washer [22] and the end surface of Spring (A) [5]. Seal 80 g (2.8 oz) of the

special grease into the Crank Case [34] (the Connecting Rod [31] side).

Apply Hitachi Motor Grease No. 29 to Needle Bearing (A) [55], the pinion portion of the Armature Ass'y [60],

the Steel Ball D6.35 [10] and the Needle Roller D8 x 20 [13]. Seal 40 g (1.4 oz) of the Hitachi Motor Grease

No. 29 into the Crank Case [34] (the First Gear [54] side).

Oil seals

Be very careful not to damage the O-ring (S-26) [15] in the Retainer Sleeve [14], O-ring (S-32) [16] on the

Retainer Sleeve [14], O-ring (S-56) [23] on the Front Cover [12], O-ring (1AS-60) [26] on the Cylinder Case

[24], O-ring (S-75) [43] in the Crank Cover [37], O-rings (A) (FPM810) [28] in the Striker [27] and in the Piston

[30] and Oil Seal [52] in the Crank Case [34].

9-1-3. Screw locking agent TB1401

Apply screw locking agent TB1401 to all hex. socket hd. bolts M5 and M6. (As the hex. socket hd. bolts for M8

that secure the front cover and the hex. socket hd. bolts (w/flange) for M8 that secure the cylinder case are

special bolts, they cannot be re-used if removed. Use fresh service parts only.)

CAUTION: If bolts are loosened by vibration, it could cause damage to the hammer body. Ensure without

fail that screw locking agent is applied to threaded portions prior to reassembly.

9-1-4. Tightening rorque

(1) Attached bolts of front cover 39.2 0.98 N

m (400 10 kgf

cm, 347.2 8.7 in-lbs.)

(Seal Lock Hex. Socket Hd. Bolts M8 x 25 [11])

(2) Attached bolts of cylinder case 19.6 N

m (200 kgf

cm, 173.6 in-lbs.)

(Hex. Socket Hd. Bolts (W/Flange) M8 x 30 [25])

(3) Seal Lock Hex. Socket Hd. Bolts M6 [33], [35] 9.80 N

m (100 kgf

cm, 86.8 in-lbs.)

(4) Seal Lock Hex. Socket Hd. Bolts M5 [36], [40] 7.84 N

m (80 kgf

cm, 69.4 in-lbs.)

(5) Attached bolts of tail cover 4.41 0.49 N

m (45 5 kgf

cm, 39.1 4.3 in-lbs.)

(Seal Lock Hex. Socket Hd. Bolts M5 x 22 [78])

(6) Attached bolts of crank case cover and back cover 3.92 0.49 N

m (40 5 kgf

cm, 34.7 4.3 in-lbs.)

(Hex. Socket Hd. Bolts M5 x 12 [45])

(7) Attached bolts of handle 4.90 N

m (50 kgf

cm, 43.4 in-lbs.)

(Seal Lock Hex. Socket Hd. Bolts M5 x 12 [91])

(8) Hex. Hd. Tapping Screws D5 x 50 [62] 2.94 0.49 N

m (30 5 kgf

cm, 26.0 4.3 in-lbs.)

(9) Tapping Screws (W/Flange) D4 1.96 0.49 N

m (20 5 kgf

cm, 17.4 4.3 in-lbs.)

<98>, <100>, <<97>>, <<98>>

+1.96

+20

+17.4

+1.96

+20

+17.4

+1.96

+20

+17.4

+1.96

+20

+17.4

--- 17 ---

9-1-5. Internal wiring

Wiring diagram of the Model H 60MR (products without control circuit ass'y)

(1) For products with noise suppressor

Fig. 19

(2) For products without noise suppressor

Fig. 20

Black

Yellow

Wiring diagram of the Model H 60MRV (products with control circuit ass'y)

110 V

230 V

240 V

120 V (USA)

Black

White

Yellow

Internal wire

Voltage

A B

Fig. 21

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Hitachi H 60MR Technical Data And Service Manual

Brand: Hitachi

Model: H 60MR

Category: Rotary hammers

Type: Technical Data And Service Manual

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H 60MRV

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Hitachi H 60MR Technical Data And Service Manual

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Hitachi H 60MR Technical Data And Service Manual

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