Shift Magnet Assembjy - IBM Selectric Maintenance Manual

6. Shift Interlock Cam - With the cycle clutch latched at
rest and the backlash of the cycle shaft and fi Iter shaft
removed in the operating direction, advance the cam
until a clearance of .040" to .060" exists between the
tip of the interlock and the top of a tooth on the shift
clutch ratchet (Fig. 33).
Take up backlash
in direction of
arrow on cam
FIGURE 33. Shift Interlock Cam
SHIFT MAGNET ASSEMBLY
NOTE: Shift mechanism adjustments must be correct be-
fore the following adjustments are attempted.
1. Hinge Plates (Fig. 34) - Position the hinge plates with
the armatures manually attracted to obtain .001" to .003"
clearance between the armatures and hinge plates.
This clearance insures free operation of the armature.
With no clearance and oil on the two surfaces the arma-
ture would have a sluggish operation. Excessive clear-
ance may cause slow operation due to the relationship
between the magnetic field and armature.
Armature
Energized
.001"
to
I
I
I
Hinge Plate
: .001" to .003"
-""i~
_ _ _ _ _
----I.
Clearance
Yoke
~
Adjusti~g Screw
iIT=1...:===~ 1'~~~1
"!!%1:'dP(!llt'li
Hinge Plate
Hltll\tll!tli'lilli'l
.00~3)" ~~~~~~
L.C. Magnet
"-Armature Energized
Adjusting Screw
FIGURE 34. Hinge Plates
2-8.1