3-78. FAN DRIVE AND FAN BLADE MAINTENANCE
a. Removal
1.
Disconnect fan drive hose (9) from fan drive (10).
NOTE
• Mark position of fan blade for installation.
• It may be necessary to apply compressed air to clutch adapter.
This disengages fan drive clutch to allow access to socket head
screws.
• The fan drive hose may be modified to add a quick-disconnect at
commander’s discretion. Refer to appendix D, Fig. D-94 for
installation.
2.
Using hex head driver, remove four socket-head screws (1) and fan drive assembly (3) from water
pump pulley (2).
3.
Remove four nuts (5), lockwashers (6) and fan blade (7) from fan drive (8). Discard lockwashers (6).
b. Inspection
Inspect clutch adapter (4) and fan blade (7) for damaged threads, cracks, bent blades, or breaks. Replace
if defective.
c. Installation
1.
Align fan blade (7) onto fan drive (8) with four lockwashers (6) and nuts (5). Tighten nuts (5) to
26 lb-ft (35 N•m).
2.
Apply sealing compound to four socket-head screws (1) and install fan drive assembly (3) to water
pump (2). Tighten socket-head screws (1) to 45 lb-ft (61 N•m).
3.
Connect fan drive hose (9) to fan drive (10).
TM 9-2320-280-20-2
3-134
Change 2
This task covers:
a. Removal
c.
Installation
b. Inspection
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Special Tools
Hex head driver, 8 mm
(Appendix B, Item 156)
Materials/Parts
Four lockwashers (Appendix G, Item 108)
Sealing compound (Appendix C, Item 43)
Manual References
TM 9-2320-280-10
TM 9-2320-280-24P
Equipment Condition
• Hood raised and secured (TM 9-2320-280-10).
• Radiator and shroud removed (optional)
(para. 3-61).
