Maintenance And Inspection - Hitachi Koki CN 16 Betriebsanleitung

Cutting materials
1.6 mm Mild steel plates
1.6 mm Mild steel
corrugated and trapezoidal
plates
1.2 mm stainless steel plates
When the machine is used according to the service life
indicated in the above table, the punch will have abrasions
as shown in the enlarged diagram of the worn punch tip
in Fig. 7. This is when the punch and die should be
replaced.
CAUTION
If the punch and die are used longer than the specified
service life, the die holder will be subject to excessive
stress and may break off.
When a 1.6 mm mild steel trapezoidal plate is cut, wear
will be especially quick. Replace the punch and die as
soon as possible after reaching the service life.
2. Punch and die replacement (see Fig. 8)
CAUTION
During the following operations, use care to prevent
dirt adhering inside the gear cover, inside the die
holder and around the piston.
(1) Punch replacement
(a) Loosen the M8 hexagon socket set screw mounting
the die holder (see Fig. 4) and remove the die
holder.
(b) Loosen the M5 hexagon socket set screw fastening
the punch to the piston and pull out the punch.
(c) Insert the new punch while aligning the taper hole
of the punch and the direction of the M5 hexagon
socket set screw, then securely tighten the hexagon
socket set screw.(see Fig. 9).
(2) Die replacement
Loosen the 2 machine screws and replace the die.
(3) Lubricaton
When the above replacement operations are
completed, apply a suitable amount of machine oil
to the sliding surfaces around the punch and die
and operate the machine without a load.

MAINTENANCE AND INSPECTION

1. Checking punch and die
A worn or defective punch and die will greatly
decrease work efficiency.
Check and replace them periodically. Refer to
"Replacing punch and die".
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. 10)
Service life cutting
lengths of punch and die
300 m
50 m
200 m
The motor employs carbon brushes which are
consumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brush with a new one having the same carbon
brush No. shown in the figure when it becomes
worn to or near the "wear limit". In addition, always
keep carbon brushes clean and ensure that they
slide freely within the brush holders.
5. Replacing carbon brushes
Disassemble the brush cap with a screwdriver. The
carbon brush can then be easily removed.
6. Service parts list
A: Item No.
B: Code No.
C: No. Used
D: Remarks
CAUTION
Repair, modification and inspection of Hitachi Power
Tools must be carried out by an Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the
tool to the Hitachi Authorized Service Center when
requesting repair or other maintenance.
In the operation and maintenance of power tools,
the safety regulations and standards prescribed in
each country must be observed.
MODIFICATIONS
Hitachi Power Tools are constantly being improved
and modified to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.
NOTE
Due to HITACHI's continuing program of research and
development, the specifications herein are subject to
change without prior notice.
IMPORTANT
Correct connection of the plug
The wires of the main lead are coloured in accordance
with the following code:
Blue: -Neutral
Brown: -Live
As the colours of the wires in the main lead of this tool
may not correspond with the coloured markings
identifying the terminals in your plug proceed as follows:
The wire coloured blue must be connected to the terminal
marked with the letter N or coloured black. The wire
coloured brown must be connected to the terminal mark-
ed with the letter L or coloured red. Neither core must be
connected to the earth terminal.
NOTE
This requirement is provided according to BRITISH
STANDARD 2769: 1984.
Therefore, the letter code and colour code may not
be applicable to other markets except The United
Kingdom.
English
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