TM 10-4320-307-24
2-41
DRIVE BELTS ADJUST/REPLACE (CONT).
INSTALLATION/ADJUSTMENT:
1.
Install and adjust alternator V-belts (1) as follows:
CAUTION
To prevent damage to belts, do not roll a belt
over the pulley or pry it on with a tool.
NOTE
When a drive uses two or more belts, replace the
belts as a complete set.
a.
Install alternator V-belts (1) over engine flywheel
(2) and into place on alternator pulley (3) and
crankshaft pulley (4).
b.
Carefully push alternator (5) away from engine
to take up slack in V-belts (1).
c.
Use a pry bar (6) between engine and alternator (5)
to gently apply tension to V-belts (1).
d.
Use tension gauge (7) to measure tension of V-belts
(1). Tension for new belts should be 130 to 150 lb,
for used belts 80 to 120 lb.
NOTE
A belt is considered used if it has been in operation for more than 10 minutes.
If a belt will not maintain the correct tension, it must be replaced.
e.
Tighten two adjusting link capscrews (8) to torque value (Grade 5 or higher) as follows:
Bolt Size
Threads/Inch
N m
Ft-lb
5/16
18
20
15
7/16
14
35
25
1/2
13
65
50
f.
Tighten alternator support bracket capscrew and nut assembly
(9) to the following torque value (Grade 5 or higher):
Bolt Size
Threads/Inch
N m
Ft-lb
3/8
16
40
30
7/16
20
90
65
1/2
13
110
80
g.
Check tension on V-belts (1) aftertightening.
2-160
