Pfaff 900/16, 900/56, 966/05 Service Manual
Service
Manual
-900/16;/56;-966/05
for
Nr.
296-12-1'ยป
6i6
Pfaff
Series
240
and
1240
Service manual for subclass
-*900/.Pfaff
series 240 and 1240
Note:
The adjustments in this service manual apply to Pfaff machine classes 241,
242, 244, 245 and 246 (small vertical hook) and to classes 1241, 1242, 1243,
1244, 1245 and 1246 (large vertical hook).
Deviations
in
the
various
in
such
data
sections.
as
Needle rise positions:
Models
Models B/C and C:
Models C/D:
Thread trim speed: 150
A
and
r.p.m
B:
1.6
2.0
2.2
mm
mm
to
Tools and other equipment for adjustment
Set
of screwdrivers,
Set of
alien
keys
from
blade
2 to 6
width 2 to 10
mm
needle
2.5
mm
mm
rise
and
clearances
are
indicated
as
such
Set of open-ended spanners
Metal
Sewing thread
rule
and
material
from
4 to 14
mm
Preliminary adjustment of control cam
Setting;
The eccentric track of control cam 3
laterally centred on it (see Fig.
When
the take-up lever is at top dead centre, the tip of latch 5
must
1.0.2).
be positioned so that latch 5 is
at the beginning of the eccentric surface of the
direction (see Fig.
1
ni
1.0.3).
I)
cam
track, in
o
must
sewing
be
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.0.2
Take out screws 1 and remove locking finger 2 together with its cover tab.
Loosen
Loosen
Adjust control cam 3 laterally so that its eccentric track is centred with latch 5.
In this position
collar.
Turn
Making sure that cam 3 is still against fixing
rotating direction so that the tip of latch 5 is at the beginning of the eccentrir
surface of the cam track (see Fig.
In this position tighten the four screws of control com
the
four
screws
the two screws of fixing collar
move
of
control
com
3.
4.
collar 4 up against cam 3 and tighten the
screws
of the
the balance wheel to position the take-up lever at top dead centre.
collar4,turn the cam in the
1.0.3).
3.
2
Control
lever
Setting:
In
the needle
2.0.2)
must
is operated.
Needle
rise positions:
rise
drop
position
freely
the flat
into
Models
the
studofcontrol
trackofcontrol
A
and
Models B/C and C:
Models C/D and D:
B:
lever6(see
com7when
1.6
mm
2.0
mm
2.2
to
2.5
arrow
engaging
mm
in Fig.
lever
8
2.0.2
2.1
2.2
2.3
2.4
2.5
2.6
2.0.3
Take out screw 1 and swing out linkage 2.
Loosen
Turn the balance wheel to set the needle baratthe corresponding needle rise
position (see above).
Move clomp 5 up against the housing, making sure that it is parallel with the
bedplate. Retain this position and adjust control lever 6 laterally so that its flat
stud drops into the track of control cam 7 when pushed lightly.
In this position hold control lever 6 against the bottom of the cam track and
tighten clamp screw
Carry out a check (see "setting").
Clamp screw 4 is left loose for adjustment of the release trip.
clomp screws 3 and
3.
4.
3
Interlocking latch
Setting:
When the
latch,
of 0.3
with
mm
eccentric
the
trimmer
between
section of cam track 2 is beneath
in its
locking
resting
latch
position,
3 and
cam
o
there
track
2.
the
interlocking
must
bea clearance
3.1
3.2
3.3
3.4
3.5
Loosen
Turn
latch
Position bearing stud 4 so
cam
In this position tighten screw 1.
Carry out a check (see "setting").
the
3.
track
screw
balance
2.
1.
wheel
to
set
that
the
eccentric
there is a
section
of
clearanceof0.3
com
track2under
mm
latch 3
and
4
Engaging solenoid
Setting:
When
the
engaging
solenoidisoperatedinthe
be a clearance of 0.3
mm
between
engaging
needle-rise
lever
3 and interlocking
position
there
latch
must
4.
4.1
4.2
4.3
4.4
o
Turn
the balance wheel to set the machine at the corresponding needle rise
position (see page 2).
Loosen
Operate
Push
with
lever3and
screw1just
engaging
the
solenoid
the
plungersothat there isa clearanceof 0.3
latch
enoughtoallow
lever3by
plunger
4.
hand,sothat
fully
engaging
into its
housing
solenoid
locking
and
2 to be
moved.
lever4engages.
position
mm
the
between
housing
engaging
together
4.5
4.6
In this position.tighten screw 1.
Carry out a check (see "setting").
5 Release trip
Setting:
in the needle-rise
clearance of
the
cam
0.3
track.
position
mm
between the pin of the control lever and the
and
with
control
lever4engaged
there
o
must
bottom
bea
of
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.0.3
Turn
the balance wheel to set the machine in the needle rise position (see Page 2)
Operate
Making
of
the
Retaining
side against control lever 4, then tighten screw3 lightly.
Tapping
lever 4 at the same time, set a clearance of
and
In this position tighten clamp screw
Carry out a check (see "setting").
engaging
sure
that clamp screw3 is still
control
this position,
cam
lever
track.
by
hand
(allow
interlocking
loose,
push
release trip 5 against engaging lever
lightlyagainst release trip 5 (in direction of
the
bottom
of
the
cam
track.
3.
push
0.3
latch
2 to engage).
control lever 4 to the
J_and
arrow)
mm
between the pin of lever 4
and
pushing
bottom
to the
control
6
Engaging lever
Setting:
With
the needle bar at top dead centre there
must
be a clearance of 0.3
between the pin of control lever 1 and the outer circumference of control
mm
com
5.
6.1
6.2
6.3
6.4
6.5
6.6
Move control lever 1 to the basic position by lifting interlocking latch 2,
Turn the balance wheel to set the needle barattop dead centre.
Loosen
Turn adjusting screw 4 to set a
lever1and
In this position lock adjusting screw 4 with nut
nut
3.
the
outer
clearanceof0.3
circumference
of
control
mm
com
3.
between
5.
Carry out a check by pushing control lever 1 (see "setting").
6.0.3
the
pinofcontrol
Actuating linkage
Setting:
When
from
shaft8begins
stop 7.
its
lengthwise
motion,
lever6must
begintolift
&
itself
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.0.2
Secure actuating linkage 1 to control lever 3 with screw
Loosen
Turn
the two nuts 4 (right- and left-hand thread).
the balance wheel to set the machineatthe correct needle rise position
(see page 2) and operate engaging lever 5.
Make sure that lever 6 is resting on stop 7. If necessary, shorten the linkage
by turning it accordingly.
Turn the balance wheel farther until shaft 8 begins its lengthwise motion.
Retain this position
itself
off
stop
In this position tighten the two nuts
7.
and
adjust
linkage 1 so
4.
that
lever 6 just begins to lift
Carry out a check (see "setting").
2.
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