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They
should
be replaced at the latest
when they
have
worn
down to 7 mm (1/4"). Please, only use
original
Fein carbon
brushes.
After
fitting
new
brushes run tool
unloaded
for
about
15
min~tes
to
allow
brushes to b
e
d in.
One pair of
spare carbon
brushes (21) will
be
found
in
the
cover of the handle, please, do
not
forget to
reorder them
in time.
In
order to prevent
accidents check cable at
regular intervals.
To
replace
the cable take off the screws
(24, 25),
then take
off
the handle
cover
(20), loosen the two
screws (19)
of the terminal
clamp (18)
and
clamp off the
cable
from
th8 switch
(2).
5. Lubrication
We recommend to renew the
gear.
grease after 300 duty hours.
Please, only use
the Fein
special grease FG
12.
For
ball
bearings
which should
be lubricated after approx. 900 duty hours
we
re
-
commend
our ball bearing grease
FK
3. The
ball
bearings are
to be rinsed in clean solvent
and
packed
with
new grease.
The space between inner and outer ring is to be one third filled
with grease in order to prevent that the bearings do not over-
heat.
Type
of
grease
FG 12 for
gearing
FK 3
for
armature
ball
bea
rings
Quantity
oz
1
g
15
I
Order Reference
MZ
60-3/
FG 12
MZ 60-1/FK 3
Contents
oz
1
g
-
~--;~
-~0-
1
1
/3
.
10
No claims can be entertained for damage due
to
negligent main-
tenance
and
inadequate lubrication.
6. Overhaul
After
900 duty
hours the machine
sh
ould
be completely dis-
mantled as described
under
paragraph 7 and all parts
should
be
thoroughly
cleaned.
Rinse ball bearings and gears in clean
solvent and
pack with fresh grease as per paragraph
5.
Please be sure that all electric parts are only cleaned dry.
7. Dismantling
1.
Unscrew
fillister head
screw (25) and the two cylindrical
screws (24), then
take
off
handle
cover
(20).
2.
Re move
supply
cable
from switch, draw out switch and dis-
connect
motor
cable.
After
unscrewing the screws
(10) draw
out carbon holder (5),
unscrew
screw (4) and
pull
out
radio interference
capacitor (3).
3.
Unscrew cylindrical
screws (60)
and (61) and
remove
out
er
bearing (35)
with
intermediate
bearing
(34).
4. Take apart
outer bearing (35) and, only
if
necessary,
the
speed-changing mechanism in the following manner:
Press
fixing bolt (53)
in direction
of point of
morse
taper
through the
bores of
the parts
(52) and
(54) (pin
punch 0.08
inch.), pull
trigger
(52) out of switch
bolt (54)
and
dismantle
drill
shaft.
5.
Pull
out armature
(26), unscrew
the
three screws (31)
and
remove armature drive
(30).
6.
Draw
insulation ring
(1 5)
out
of
motor housing (1), unscrew
cylindrical screws
(14) and remove
pole
housing (12).
Re-assemble
in
reverse sequence.
Please,
b
ear
in mind that
existing
washers are to b
e
placed in
right
places.
Their loss
would
lead
to damage.
8. Repair and spare parts
We
recommend
our Fein
Service
Stations
to
carry out all over-
haul
and repair
work
quickly and
expertly.
Please quote Order Reference
when
ordering spare parts or
send
in sample part, quoting
the
type
of
the machine.
We
draw
your
attention to
the need
to carry out a
high
voltage
test in
accordance
w
ith
your
local
regulations
(or
VDE
regu,
lation 0740)
before taking
a tool
into service
after
any
repair
carried
out by your
own
staff.
(
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