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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.
Using cracked, deformed or damaged wheels can lead to wheel breakage and resulting serious injury.
1. Replacing the depressed center wheel
Replace the depressed center wheel when it has been
worn out to about 2-3/8" (60mm) in external diameter.
Confi rm that there is no crack or any damage to
the depressed center wheel. If there is a crack or a
transformation in the wheel, replace it immediately.
2. Inspecting the screws
Regularly inspect all screws and ensure that they are
fully tightened. Should any of the screws be loosened,
retighten them immediately.
WARNING
Using this grinder with loosened screws is
extremely dangerous.
3. Confi rm that there is no damage in the wheel guard,
the electrical cord and the housing, etc.
Check that the on/off switch operates normally.
4. Inspecting the carbon brushes (Fig. 6)
No. of carbon brush
Wear limit
61
0.89" (22.5mm)
Fig. 6
The motor employs carbon brushes which are
consumable parts. Replace the carbon brush with
a new one when it becomes worn to its wear limit.
Always keep carbon brushes clean and ensure that
they slide freely within the brush holders.
CAUTION
Using this grinder with a carbon brush which is
worn in excess of the wear limit will damage the
motor.
NOTE
Use metabo HPT carbon brush No. 61 indicated in
Fig. 6.
0.26" (6.5mm)
○ Replacing carbon brushes:
<Disassembly>
(1) Loosen the D4 tapping screw retaining the brush
cover and remove the brush cover.
(2) Use the auxiliary hexagonal wrench or small
screwdriver to pull up the edge of the spring that
is holding down the carbon brush. Remove the
edge of the spring toward the outside of the brush
holder.
(3) Remove the end of the pig-tail on the carbon brush
from the terminal section of brush holder and then
remove the carbon brush form the brush holder.
<Assembly>
(1) Insert the end of the pig-tail of the carbon brush in
the terminal section of brush holder.
(2) Insert the carbon brush in the brush holder.
(3) Use the auxiliary hexagonal wrench or small
screwdriver to return the edge of the spring to the
head of the carbon brush.
(4) Mount the tail cover and tighten the D4 tapping
screw.
Carbon Brush Spring
5. 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.
English
Brush Holder
Fig. 7
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