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 TM 55-1905-223-24-5
c. Inspect pulley alignment. Misalignment must not exceed 1/16 inch per foot (0.5mm per cm) of
distance between pulley centers. If misaligned, replace the idler pulley assembly (32, FIGURE 2-21,
Sheet 3). Refer to REMOVAL steps of this procedure.
ADJUSTMENT
a. Remove belt guard (5, FIGURE 2-21, Sheet 1) by removing two hexhead capscrews (2), lockwashers
(3) and flat washers (4).
b. Use belt tension gauge (3, FIGURE 2-21, Sheet 2) to measure V-belt (2) tension.
(1) New belt tension should be 150 to 160 ft-lbs (200 to 220 N ).
m
(2) Used belt tension should be 70 to 120 ft-lbs (95 to 165 N ).
m
c. Loosen idler pulley assembly locking nut (14, FIGURE 2-21, Sheet 1).
d. Turn adjusting screw (1) counterclockwise to decrease tension on V-belt (2).
e. Turn adjusting screw (1) clockwise to increase tension on V-belt (2).
f. Tighten idler pulley assembly locking nut (14) to 50 ft-lbs (70 N ).
m
g. Replace belt guard (5, FIGURE 2-21, Sheet 1) and secure with two flat washers (4), lockwashers (3)
and hexhead capscrews (2).
REMOVAL
a. Drain the engine coolant.
b. Remove water pump belt guard (5, FIGURE 2-21, Sheet 1) by removing two hexhead capscrews (2),
lockwashers (3) and flat washers (4).
c. Remove mounting bracket (9) and hardware (6, 7, 8, and 10).
d. Loosen the idler pulley shaft locknut (14).
e. Turn adjusting screw (13) counterclockwise to release belt tension and remove water pump V-belt
(19). Remove adjusting screw (13). Remove locknut (14) and washer (15) to remove idler pulley
assembly (18).
f. Remove water bypass pipe (11), capscrew and retaining clamp (25, 26, FIGURE 2-21, Sheet 3), and
preformed packing (24, FIGURE 2-21, Sheet 3).
g. Disconnect water filter hose (16, FIGURE 2-21, Sheet 1).
h. Remove water transfer connection capscrews (20), plate (21) and gasket (22). Discard gasket.
2-87
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