IBM Selectric Maintenance Manual page 88

5. Feed Roll Side Play
a. Early - The left and right hand paper feed mount-
ing arms should be ad justed to provide the rear feed
roll shafts with an end play of .015" to .030" when
the feed rolls are against the platen (Fig. 187).
b. Late - The left and right hand front feed roll arm
assemblies should
be
adjusted to give end play to the
feed roll shafts that will not permit them to contact
the sides of the openings in the deflector but will
permit them to roll freely (Fig. 18B). Not Shown.
Carriage Tie Rod
Center Support Bracket
FIGURE lBB. Center Support Bracket
6.
Feed Roll Adjustment
a. Early - Adjust the eccentrics with the high points to
the rear so that three tab cards inserted between the
platen and the rear feed rolls wil I cause a clearance
of .008" to .012" between the front feed rolls and
the platen (Fig. 189). The clearance should be equal
on both ends of the feed roll.
Make Adiustment Here
Front Feed
Rail
Arm
FIGURE 189. Feed Roll Adjusting Eccentrics
(Old Style)
b. Late - The front feed roll adjusting arms should be
adjusted as follows: When two tab cards are placed
between the front feed rolls and the platen, the rear
feed rolls should clear the platen (Fig. 190). When
one tab card is placed between the front feed rolls
and the platen, the rear feed rolls should touch the
platen.
Check Clearance Here
Loosen Here
FIGURE 190. Feed Roll Adjusting Arm (New Style)
7. Paper Release - Adjust the feed roll release arm (Fig.
191) to obtain a release clearance of .055" to .065"
between the rear feed roll and the platen.
2-55
Excessive clearance can cause interference between the
front feed roll and the carrier; whereas insufficient
clearance will not permit straightening of thick paper
packs. .
NOTE: The clearance should be the same at each end
of the feed roll. The clearance can be equalized by
adjusting either the left or right feed roll release lever
(Fig. 191).
Fecd Roll
Release Lever
Adjust Feed Roll Release Arm
Located At Right End Of Feed
Roll Actuating Shaft
FIGURE 191. Paper Release Adjustment