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 TM 55-1930-208-24
3-24. FAN BELTS - Continued
b. Installation.
NOTE
Replace all belts in the set when one is worn.
(1) Refer to figure 3-59 and slip the matched belt set (7) over the fan blades and into the grooves of the pulleys.
(2) Tighten bolt (6) to place sufficient tension on the belts so they are held in place in the grooves of the pulleys.
(3) Install the fan guard using six screws (3), six lockwashers (2), and six nuts (1).
(4) Adjust fan belt tension per the following paragraph.
c. Adjust.
(1) New belts.
(a) Refer to figure 3-59 and tighten bolt (6) so that a firm push with the thumb, at a point midway between the
two pulleys, will depress the belt 1/2 to 3/4 inch.
(b) When proper tension is obtained, tighten four bolts (5) securing the fan pulley.
(c) New standard V-belts will stretch after the first few hours of operation. Run the engine for 15 seconds to
seat the belts, then readjust the tension. Check the belts again after 1/2 hour and again after 8 hours. If
necessary, readjust the belts per the following instructions.
(2) Belt readjustment.
(a) Refer to figure 3-59 and loosen four bolts (5) securing fan pulley.
(b) Adjust bolt (6) so that a firm push with the thumb, at a point between the two pulleys, will depress the belt
1/2 to 3/4 inch.
(c) When proper tension is obtained, tighten the four bolts (5) securing the fan pulley.
3-100
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