Figure 118. Drive with cover removed to reveal gear train.
1
Loader motor worm gear 6 Threader mechanism gear
2 Cartridge loader tray guide bearing 7 Lever
3 Rotator stub 8 Loader mechanism gear
4 Threader motor worm gear
5 Threader intermediate gear
6. As the tape leader block assembly (LBA) is secured in the cartridge, you hear the LBA retention spring
clips click into place. If you do not hear the click, continue rolling until the threader motor worm gear
( 4 in Figure 118 on page 194) stops. The LBA is in the correct position.
Note: Be sure to keep tension on the tape as the LBA is drawn into the cartridge by using a hex
wrench as shown in Figure 117 on page 193.
7. Notice these mechanisms:
a) Loader mechanism gear ( 6 in Figure 118 on page 194) nearest the front of the drive that actuates
the cartridge loader mechanism.
b) Position of the rotate stub ( 3 in Figure 118 on page 194).
c) Front loader motor worm gear ( 1 in Figure 118 on page 194). Rotating this gear allows the loader
mechanism gear ( 8 in Figure 118 on page 194) to turn.
8. Rotate the loader motor worm gear ( 1 in Figure 118 on page 194) to turn the loader mechanism gear
( 6 in Figure 118 on page 194) counterclockwise. Continue turning until the rotator stub ( 3 in Figure
118 on page 194) loses contact with the lever ( 7 in Figure 118 on page 194). This action releases
the LBA leader pin.
9. Rotate the threader motor worm gear ( 4 in Figure 118 on page 194) to turn the threader mechanism
gear ( 6 in Figure 118 on page 194) counterclockwise. This action moves the LBA out of the cartridge
and past the read/write head. Stop this rotation when the LBA is near the tape guide roller nearest
the rear of the drive that is shown as 1 Figure 119 on page 195.
194
IBM TS4300 Tape Library Machine Type 3555: User's Guide
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