English
20
MAINTENANCE AND INSPECTION
WARNING
Be sure to switch power OFF and disconnect the plug from the receptacle during
maintenance and inspection.
1. Inspecting the tool
Since use of a dull tool will cause motor malfunctioning and degraded e
ffi
ciency, replace
the tool with new ones or resharpen them without delay when abrasion is noted.
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.
WARNING
Using this Demolition Hammer with loosen screws is extremely dangerous.
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. 11
)
The motor employs carbon brushes which are
consumable parts. When they become worn to or
near “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 Nos. shown in the
fi
gure.
In addition, always keep carbon brushes clean and
ensure that they slide freely within the brush holders.
CAUTION
Using this Demolition Hammer with a carbon brush which is worn in excess of the wear limit
will damage the motor.
○
Replacing carbon brushes:
Loosen the two set screws and remove the plate and the tail cover. Remove the brush caps
and carbon brushes.
After replacing the carbon brushes, tighten the brush caps securely and to install the plate
and the tail cover with securely tightening two set screws.
5. Replacing supply cord
If the replacement of the supply cord is necessary, this has to be done by the manufacturer
of this agent in order to avoid a safety hazard.
Fig. 11
No.73 : 7 mm
No. of carbon brush
17 mm
No.43 : 6 mm
Wear limit
000Book̲H41MB2̲ChS.indb 20
000Book̲H41MB2̲ChS.indb 20
2018/05/17 10:55:43
2018/05/17 10:55:43
