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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 effi ciency, replace the tool with a new
one or resharpening without delay when abrasion is
noted.
2.
Inspecting the screws
Regularly inspect all screws and ensure that they are
properly tightened. Should any of the screws be loose,
retighten them immediately.
WARNING
Using this Demolition Hammer with loosen screws
is extremely dangerous.
3.
Maintenance of the motor
The motor unit is the very "heart" of the power tool.
Exercise due care to ensure the motor 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. 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.
No.43 : 0.24"(6 mm)
No.73 : 0.28"(7 mm)
Fig. 10
○
Replacing carbon brushes:
(For parts name, refer to Fig. 1)
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.
Grease replacement
This Demolition Hammer is of full air-tight construction
to protect against dust and to prevent lubricant leakage.
Therefore, this Demolition Hammer can be used
without lubrication for long periods. Replace the grease
as described below.
○
Grease Replacement Period
After purchase, replace grease after every 6 months
of usage. Ask for grease replacement at the nearest
authorized Service Center.
6.
Service and repairs
All quality power tools will eventually require servicing
or replacement of parts because of wear from normal
use. To assure that only authorized replacement parts
will be used, all service and repairs must be performed
by a metabo HPT AUTHORIZED SERVICE CENTER,
ONLY.
MODIFICATIONS
metabo HPT Power Tools are constantly being
improved and modified to incorporate the latest
technological advancements.
Accordingly, some parts may be changed without prior
notice.
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