Singer 40 - Disc Pack Mounting Procedures - Model 42 Top Pack; Mounting Model 41 B Disc Pack on Model 42

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Operating Instructions
To mount the top pack (Model 41B) on a Model 42 Disc Drive, proceed as
follows:
a. Lift the carrying case by the top handle.
b. Holding the pack upside down, turn the knob on the bottom of the case
counterclockwise until the bottom of the case comes off.
c. Place the pack on top of the resident pack so that the large arrows on the
two packs are aligned. There is a pin protruding from the top of the
resident pack and this pin should fit into a hole in the bottom of the re-
movable pack. When the pin is in the hole, the two packs are locked
together. The operator may have to turn the removable pack slightly in
one direction or the other to cause the pack to drop into place.
d. When the packs are properly joined, press the top handle down and turn
it clockwise.
e. When the handle will no longer turn, lift the case out of the compartment.
Figure 8-3. Bottom View of a Model 41, 41A, or
41B Disc Pack in Its Carrying Case
Models 40 to 42 Reference Manual 8-3