Singer 246K43 - TO REMOVE AND REPLACE THE KNIVES; TO ADJUST THE TRIMMER

TO REMOVE AND REPLACE THE KNIVES
(See Fig. 44)
041 V\
r c4
X4~--
, ~L4
Fig. 42. Contact Point of Knives
REMOVING THE MOVABLE KNIFE 04:
Remove the clamp screw Q4, Fig. 43 with the
chip ejector 04, the knife guard C4 and the knife
clamp Z3. Lift the knife 04 from the knife
holder P4.
REPLACING MOVABLE KNIFE 04:
Slip the knife in knife holder P4, replace the
knife clamp Z3, the knife guard C4, the chip ejec-
tor
04, and the clamp screw Q4. Press the mov-
able knife 04 downward against the stationary
knife L4, Fig. 43 and securely tighten the clamp
screw Q4.
Turn the machine pulley over from you, until
the lowest point X4, Fig. 42, of the cutting edge
iii"' ~ ~ D4 of the movable knife 04, just reaches the cutting
L4
T4
Fig. 43. Removal and Replacement of Knives
REMOVING STATIONARY KNIFE L4:
Loosen screw V4, Fig. 44, page 24 and draw
the knife L4 upward and out.
REPLACING STATIONARY KNIFE L4:
Push the knife L4 downward into the knife
holder S4, until the cutting edge of the knife L4
is flush with the top surface of throat plate. Then
securely
tighten the clamping screw V4, Fig. 44,
page 24.
23
edge of the stationary knife L4, as shown in
Fig. 42. Loosen the set screw T4 sufficiently to re-
lease the spring behind the stationary knife L4,
permitting the stationary knife to make a tight
spring contact with the movable knife 04. Then
securely tighten
the set screw T4.
TO ADJUST THE TRIMMER
SETTING HEIGHT OF STATIONARY KNIFE:
Loosen screw V4, Fig. 44, page 24.
Raise or lower knife L4, Fig. 44 in the knife
holder
S4, until the cutting edge of the knife is
at the same level as top surface of throat plate.
Then secur:ely tighten screw V4, Fig. 44,
page 24.
WIDTH OF BIGHT:
The position of the stationary knife blade L4
in relation to the needle determines the width of
bight.
For some types of work, the width of bight
must conform to the width of the chaining-off
finger.
From the library of: Superior Sewing Machine & Supply LLC