7
The reduction gear
Some change in the sound level when using the
reduction gear is normal. The gear should be
exchanged only if the sound deviation is very
noticeable.
Dismantling
Set the thread take-up lever at the lowest position,
remove the handwheel and then take away the belt
guard, printed circuit and cog belt. Unscrew the
screw (14/12) in the base plate and loosen the
screws (14/36) in the holder (14/6). The
screws (14/8, 9) in the reduction gear are
accessible through the holes in the large
cog belt wheel. Remove both screws, turn
the holder and lift out the reduction gear.
Mounting of the reduction gear is done by placing
the frame (14/20) inside the holder and screwing in
the screws (14/8, 9). Replace and tighten the screws
(14/36, 14/12). Check that the star lock washer is in
place (14/35) and check the tension. Replace the
belt guard and handwheel, making sure that the
thread take-up lever is at the lowest position and
the metal latch on the handwheel points upwards.
Spare parts: See RA, page 14.
The terminal board
Check all connections and cables.
If there is interference in radio or television
reception from the machine, exchange the condenser.
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