IBM 5280 Maintenance Information Manual page 121

355
DRIVE FAN AND PULLEY REMOVAL AND
REPLACEMENT
Removal
1 . Power off.
DANGER
Capacitor discharge voltage might be present at the
socket when the AC drive motor power cable is
disconnected.
2. Disconnect the AC drive motor power cable
D.
3.
Remove the drive belt
m.
4. Remove the two fan enclosure mounting screws
II;
then remove the fan enclosure
II.
5. Loosen the setscrew
B.
6. Remove the drive fan and pulley
II.
34 AC Drive
365
Replacement
1.
2.
3.
Reinstall the drive fan and pulley on the motor shaft
with the setscrew
fJ
centered on the flat surface of
the shaft. (Leave the setscrew loose.)
Place the drive fan and pulley on the motor shaft
with a gap Bof 0.5
±
0.1 millimeter (0.020
±
0.001
inch) between the motor face and the fan hub.
Tighten the setscrew.
4.
Reinstall the fan enclosure.
6. Reinstall the drive belt.
6.
Reconnect the AC drive motor power cable.