ARMY TM 9-6115-670-14&P
4-56
4.23. FAN BELT.
This task covers:
a. Inspect
b. Adjust
c. Replace
INITIAL SETUP
Tools
General Mechanic's Tool Kit
(Item 1, Appendix B)
12.0mm Socket Wrench Socket
(Item 50, Appendix B)
14.0mm Socket Wrench Socket
(Item 51, Appendix B)
Materials/Parts
Equipment Conditions
Engine stopped and allowed to cool completely.
MASTER ON-OFF switch on APU controller set to
OFF.
Fan guard, fan shroud and shroud housing removed
(para 4.18.).
Fan Belt
INSPECT
Inspect fan belt (8, Figure 4-10) for wear. Fan belt (8) should be flush with top of groove in each pulley (1, 6,
and 9). If fan belt (8) is not flush with top of groove in each pulley (1, 6, and 9), replace fan belt (8).
ADJUST
a. Press the fan belt (8) between the fan pulley (1) and the alternator pulley (6) with your finger firmly
(approximately 22 lbs (10 kg)). Fan belt deflection should be about 0.874 inches (2.2 cm).
b. If deflection is not correct, loosen adjusting bolt (4).
c. Move alternator (3) in bracket (5), tighten adjusting bolt (4), and test deflection. Repeat steps a
through c until correct deflection is reached.
d. When correct deflection is reached, tighten adjusting bolt (4).
REPLACE
a. Loosen pivot bolt (7), on bottom or alternator (3).
b. Loosen adjusting bolt (4).
c. Slide alternator (3) in adjusting bracket (5) until fan belt (8) is loose.
d. Remove fan belt (8) from alternator pulley (6), fan pulley (1), and crankshaft pulley (9).
e. Remove fan belt (8) over fan (2).
f. Install fan belt (8) over fan (2).
NOTE
If belt is too tight to be removed, remove battery charging alternator (para 4.36).
