Hitachi Koki H 60MA, Handling Instructions Manual

6

English

Standard number of strikes

Dial     Number of strikes/min.

6

1600

5

1540

4

1420

3

1280

2

1080

1

  900

(1) Clean the shank portion of the tool.
(2) As shown in 

Fig. 1

, pull grip (A) in the direction

of 

A

, and insert the tool into a hole of the front

cap while turning in the direction of 

B

.

(3) Adjust the groove position while turning the tool,

and furthermore insert it until it hits the end of the
hole.

(4) Return grip (A) to its original position, pull the tool

and make sure it is locked completely. (

Fig. 2

)

5. Deciding Working Position of Tool

The tool can be turned every 30 degrees and can
be fixed at the position of 12 steps.

(1) As shown in 

Fig. 3

, if grip (A) is turned in the

direction of 

B

 in a state where grip (B) is turned

60 degrees in the direction of 

A

, the blade angle

can be changed freely to any desired position.

(2) As shown in 

Fig. 4

, if grip (B) is turned 60 degrees

in the direction of 

A

, the holding part of the tool

automatically turns 30 degrees. If this action is
repeated, the blade angle of the tool can be changed
by every 30 degrees.

(3) Release grip (B) and turn the tool, and make sure

that it is locked completely.

6. Removing Tool

As shown in 

Fig. 1

, pull grip (A), and pull out the

tool while furthermore turning in the direction of

B

.

7. Move the side handle

The side handle can be fixed at any desired position;
360 degrees, and can also be fixed at any position
in the back-and-forth direction.

(1) Loosen the handle by turning the grip in the direction

of 

A

 as shown in 

Fig. 5

.

(2) Adjust it to a position where vertical (up-and-down)

operation can be facilitated as illustrated in 

Fig. 6

,

Fig. 7

, and 

Fig. 8

.

(3) Turn the grip in the direction of 

B

 and fix the

handle.

8. Select the number of strikes (applicable only to

H60MB) (Fig. 9)

CAUTION:

Do not make any adjustment of the dial
during operation.  Holding the main body
with one hand can swing you around,
resulting in an injury.

This machine has an electronic controlled circuit
built-in, enabling stepless regulation of the number
of strikes.  Make the most of this machine by
adjusting the dial according to the working contents;
chiseling, demolishing, or the quality of the material
to be chiseling  or demolishing.
The scale ”1” of the dial is for the minimum speed
with 900 strikes per minute, and the scale ”6” is
for the maximum speed with 1600 strikes per minute.

HOW TO USE THE DEMOLITION HAMMER
(Fig. 10)

1. After placing the tip of the tool on concrete surface,

switch ON.
The switch can be turned ON if the trigger is pulled
and OFF when it is released.
If the stopper is pressed while the trigger for the
switch is pulled, even if your finger is released from
the trigger, the switch remains ON - convenient for
continuous operation.
To turn the switch OFF, pull the trigger again, and
then the stopper comes off.

2. By utilizing the empty weight of the machine and

by firmly holding the demolition hammer by both
hands, you can effectively control the subsequent
recoil motion.
Proceed at a moderate work-rate, the use of too
much pushing force will impair efficiency.

GREASE REPLACEMENT

This machine is of fully oil sealed construction to protect
against dust incursion and to prevent lubricant leakage.
This machine can be used without grease replenishment
for an extended period of time.  However, perform the
grease replacement to extend the service life. Replace
the grease as described below.

1. Grease Replacement Period

You should look at the grease when you change
the carbon brush. (See item 4 in the section
MAINTENANCE AND INSPECTION.)
Ask for grease replacement at the nearest Hitachi
Authorized Service Center.
In the case that you are forced to change the grease
by yourself, please follow the following points.

2. How to replace grease
CAUTION:

Before replacing the grease, turn the power off and
pull out the plug from the receptacle.

(1) Disassemble the crank cover and thoroughly wipe

off the old grease inside. (

Fig. 11

)

(2) Supply 60g (the standard volume to cover the

connecting rod) of Hitachi Electric Hammer Grease
A in the crank case.

(3) After replacing the grease, reassemble the crank

cover securely. At this time, do not damage or lose
the oil seal.

NOTE:

The Hitachi Electric Hammer Grease A is of the low
viscosity type. When the grease is consumed,
purchase from a Hitachi Authorized Service
Center.

MAINTENANCE AND INSPECTION

CAUTION

To prevent accidents, make sure to turn the switch off
and disconnect the plug from the receptacle.

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.

2. Inspecting the mounting screws:

Regularly inspect all mounting screws and ensure
that they are properly tightened. Should any of the