Fein ASb 648, ASb 748 Operating Instructions Manual
Operating instructions
for the
Impact Wrench type ASb
648
and ASb
748
(42
Volts)
1. Technical data
Current: ~ (single
phase
A.C.)
For
screws
Max
.
ASb
648
To be handed to the workshop
Net
weight
Type
torque
Square
drive
Speed
R.P.M.
Taps
Input
I
full
load
per
min. Watts
I
from
to
kpm
I
Lbs.
ft
ASb 648
M
12
(
1
/2")
M 22 ('/s")
40 289
ASb 748
2.
Connection
and
operation
Main
voltage
must
correspond
to
the
operating
voltage
marked
on
the
rating
plate.
To
prevent
the
overbridging
of
the
insulation
no
additional
marking
plates
and
signs
must
be
riveted
or
screwed
on
the
housing.
We
recommend
the
use
of
transfers
only.
The
machine
is
provided
with a reversing
switch
for
clockwise
and
anticlockwise
rotation.
It
must
not
be
operated
when
the
machine
is
running
.
The
full
tightening
or
slackening
action
provided
depends
on
the
time
during
which
the
percussion
mechanism
is
allowed
to
run
.
Max. tightening
torque
is
the
sum
of
the
torque
applied
by
each
stroke. According
to
the
type
of
screwed
connection
the
max
.
torque
will
be
generally
reached
in 3 or 5 seconds
.
The
running-down
torques
may
vary
considerably
with
thread
friction,
friction
between
bolt
head
and
rest
face,
flexibility
("spring")
in
the
parts
to
be
joined, wear
in
the
tool
drives
and
socket
squares.
3.
Maintenance
and
lubrication
Pull
out
plug
before
carrying
out
any
maintenance
work.
Grease
once
per
week
at
the
lubricating
nipple
(60)
(when
needed
every
BE 349 e
EW
1. 73
Printed
in
German
y
lbs
.
kg
lf/'
1500 1500 450
10,5
5
two
days).
After
300
working
hours
clean
air
openings
of
the
motor
housing.
Blow
out
motor
with
dry
pneumatic
air.
Renew
the
gear
grease. Loosen
screws
(30)
and
take
off
gear head.
Only
use
special
gear
grease
Sst
1.
Quantity
of
grease
50
g.
Order
reference
for
the
tube
of
approx
. 90 g:
MZ
60-3/
Sst
1.
After
900
working
hours
clean
the
machine
thoroughly. Rinse
ball
bearings
and
gearing
in
clean
solvent
and
pack
with
fresh
grease
(Sst 1).
The
space
between
inner
and
outer
rings
is
to
be
one
third
filled
with
grease
in
order
to
prevent
overheating
of
the
bearing.
Clean
electric
parts
only
dry.
Replace
carbon
brushes
when
they
have
worn
down
to 7 mm
(0.28 in.).
To
replace
brushes
see
paragraph
4.
Only
use
Fein
carbon
brushes.
After
fitting
new
brushes
check
that
they
move
easily
in
their
holder. Run
tool
unloaded
for
about
15
min.
Check
connection
cable
(43)
at
regular
intervals.
To
replace
it,
unscrew
screws
(51, 31),
remove
the
handle
upper
part
(46),
loosen
the
screws
(50)
of
the
clamping
bridge
and
clamp
off
cable
from
switch
(47).
No
claims
can
be
entertained
for
damage
due
to
negligent
maintenance
and
inadequate
lubrication.
~
"1
60 59
76 75
73
74
72
71
70
69 63
I
78
Verdrohlungsplan
EZI-85-1
, -
--,
1 1 Umschal
ter
Ldl
1
Net
z1~
Au
ssc
ha/ter
68
-
3
77 28
24
17
TO
--------50
~
51
CJ
45
21
25
22
35
18
11213
1 6 18
4
13 14
33 34
1
--
1
I
i
!
1
3o~
I
TOO
29
A~
32
~
Schnitt A
-8
40
16
32
g;m
1.0
1
31
-
_/~
I
lctY
~
-+---
--
46
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