IBM 1403 Field Engineering Maintenance Manual page 22

Movable-Base Removal
1. Remove the ribbon.
2. Remove the cartridge assembly.
3. Remove the cover over the terminal block on the
rear of the T -casting.
4. Remove the cover over the read-head assembly.
5. Remove the read head (Figure 15).
6. Remove the timing-disk assembly by removing the
one screw from the bottom.
7. Remove the read head and disk housing.
8. Remove the two screws that attach the print-
timing mount block to the movable base.
Figure 15. Movable Base
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9. Remove the screws in the front cover of the print-
timing dial.
10. Remove the screws in the movable-base front gibs.
11. Remove the lower ribbon guide bar.
12. vVork enough slack in the read-head cable {un-
tape the cables if necessary) to allow the movable
base to be lifted clear of the T -casting.
Remove the movable base.
1. Carefully lift the base up off the eccentric-bearing
blocks.
2. Carefully raise the base so that the print-control-
dial assembly clears the T-casting lock lever so read-
head cable is not damaged.
Reassemble in reverse order and adjust the movable
base during reassembly.