IBM 01 Maintenance Manual page 69

MODEL 04
CUSTOMER ENGINEERING
rear hole of the escapement frame to permit the insertion of
a small pin punch in the cotter-pin hole of the shaft. The
pin punch may then be used to pull the shaft far enough
through the hole so that when the rear bushing is again
installed, the shaft may be lined up with the cotter-pin hole
in the end of the bushing.
Use extreme caution to prevent the escapement wheels
from separating and releasing the ball bearings.
Adjustments
THE REAR BUSHING may be adjusted by its two lock nuts
so that there is a minimum of end play in the center escape-
ment wheel. This adjustment should insure free operation of
all escapement wheels and should position the escapement-
pinion ratchet wheel so that it does not bind against the
rear rail.
Maintenance
LUBRICATION. Oil, sparingly, the gears located on the
escapement wheels. Do not oil the teeth of the escapement
wheels.
ESCAPEMENT - RACK
Removal
Remove the four escapement-rack screws and back off
the adjustment screws until they are flush with the bottom
of the carriage. Pry out the escapement-rack dowel from
the left end of the carriage and remove the rack.
Adjustments
There should be .005" backlash between the escapement
pinion ratchet wheel and escapement rack. Check this clear-
ance by positioning each escapement-rack screw directly
over the escapement-pinion ratchet wheel. Move the margin
stop against the margin lever; depress a carriage-release
lever and hold the carriage to the right. Test the backlash
by wiggling the escapement-pinion ratchet wheel with a
screwdriver or similar tool. By unhooking the paper-table
springs and allowing the paper table to rotate farther to the
rear, it is possible to reach the escapement-pinion ratchet
wheel from the top of the machine.
Adjust the escapement rack by following this procedure
(Figure 6):
. 1. Loosen the escapement-rack screws.
2. Loosen the adjusting screw lock nuts.
3. Lower the rack by lowering the adjusting screws and
tightening the escapement rack screws.
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