Maintenance And Inspection - Hitachi CN 16SA Handling Instructions Manual

English
REPLACING PUNCH AND DIE
CAUTION
In this case, be sure to previously disconnect the plug
from the power supply.
1. Service Life of the Punch and Die
Wear and damage to the cutting edges of the punch and
die can greatly infl uence the cutting operation. Under
normal usage, the service life of the punch and die is
as shown in the table below. Replace the punch and die
promptly when the end of the service life approaches.
The punch and die should be replaced at the same time.
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 specifi ed
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
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 effi ciency.
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.
6
Service life cutting
lengths of punch and die
300 m
50 m
200 m
replacement operations
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)
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 fi gure 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 a carbon brush
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, modifi cation 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.
MODIFICATIONS
Hitachi Power Tools are constantly being improved
and modifi ed to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.
GUARANTEE
We guarantee Hitachi Power Tools in accordance with
statutory/country specifi c regulation. This guarantee does
not cover defects or damage due to misuse, abuse, or
normal wear and tear. In case of complaint, please send
the Power Tool, undismantled, with the GUARANTEE
CERTIFICATE found at the end of this Handling instruction,
to a Hitachi Authorized Service Center.
NOTE
are
Due to HITACHI's continuing program of research and
development, the specifi cations herein are subject to
change without prior notice.