IBM 6151 Maintenance And Service Manual page 449

Cooling Fan Assembly Replacement
1. Align the cooling fan assembly and press into position.
2. Connect the cooling fan assembly power cable.
3. Install the fixed-disk and diskette adapter in slot 6.
4. Do the "Top Cover Replacement" On page 4-13.
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Cooling Fan
Mounting Latches
Cooling Fan Power Connector
AJZBFOHI
(6/88) Removal and Replacement 4-39