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TM 9-4120-389-14
c.
Service
WARNING
Dry cleaning solvent P-D-680 used to clean parts is potentially dangerous to personnel and property. Avoid
repeated and prolonged skin contact. Do not use near open flame or excessive heat. Flash point of solvent is
100 deg F (38 deg C).
(1)
Brush off loose dirt or foreign matter from fan.
(2)
Wipe fan with a cloth dampened with dry cleaning solvent (Item 19, Appendix E).
(3)
Dress machined surfaces on motor shaft and fan hub (if fan was replaced) using fine emery
(Item 27, Appendix E).
d.
Installation
(1)
Slip fan hub on motor shaft.
(2)
Center fan in scroll and slightly tighten set screw on flat of motor shaft.
(3)
Spin fan to verify connect alignment. If not aligned repeat steps.
(4)
Reach into large opening (outlet) of scroll and tighten two set screws.
CAUTION
One of either set screws must engage flat of motor shaft.
(5)
Install five screws and lockwashers (four each LH scroll) that secure the outboard bell to
scroll.
Follow-on assembly: Install evaporator fan assembly (See para. 4-31).
4-102
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