IBM 01 Maintenance Manual page 144

REFERENCE MANUAt
MODEL Bl
Adjustments
1. THE TYPEWRITER SWITCH
should function without
hesitation and have even positive overthrow in both posi-
tions.
2. THE SELF-ALIGNING OILln BEARINGS
of the motor
and power roll should be aligned to their shafts to elim-
inate binds. If a bind should occur, a slight tapping action
on the pulleys with the handle of • screwdriver should
produce satisfactory results.
3. POWER ROLL END PLAY
should be .002" to .010".
Make the adjustment by positioning the power roll drive
pulley on the shaft while tightening the set screws (Fig-
ure 3).
4. DRIVEN BELT.
Adjust by positioning the intermediate
pulley shaft. The shaft incorporates a
left-hand thread
80
that the pulley rotation tends to tighten the shaft. The
deflection of the belt should be approximately 3/8" (Fig-
ure 1).
S. POWER ROll. SPEED
is obtained by a two-step motor
pulley. The 14-tooth step provides 95 feet per minute and
the IS-tooth step provides 103 feet per minute. The motor
pulley should be positioned on the motor shaft to align
the belts and the pulleys (Figure 1).
6. DRIVE BELT.
Place this on the IS-tooth pulley on ma-
chines of 6-2/5, 8, 9, and 10-pitch escapement. On machines
having a 12 or 14-pitch escapement, place the drive belt
on the 14-tooth pulley. Adjust the play of this belt for
approximately 3/16" deflection by positioning the motor
adjusting screw forward or backward in its elongated
mounting hole (Figure 1).
To adjust the drive belt tension on the ring-mounted
motor, loosen the motor adjusting screw and the ring-mount
bracket screw. The motor may then be moved to the front
or rear for proper belt tension. After tightening these
screws, check the motor housing to be sure that it is
parallel to the rear frame and that the ring-mount screws
are tight (Figure 2).
KEY LEVERS, LEITER CAMS AND TYPE BARS
Removal
KEY LEVERS
1.
Remove the front case.
2. Remove the key plate and the key lever stabilizer.
3. Remove the speed clip on either end of the key lever
fulcrum wire (Figure 4).
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