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M0076814-03
Fan Belt Adjustment
Illustration 66
Typical example
1. Remove the belt guard, refer to OEM for the
correct procedure.
2. Loosen lock nut (3). Rotating nut (4) counter-
clockwise will move pulley (1) and loosen belts (2).
Rotating nut (4) clockwise will move pulley (1) and
tighten belts (2).
3. With the correct tension set, tighten nut (3).
Tighten nut (3) to a torque of 102 N·m (75 lb ft).
4. Use a suitable belt tension tool to set the belt
tension.
5. Reinstall the belt guard, refer to OEM for the
correct procedure.
If new drive belts are installed, check the drive belt
tension again after 30 minutes of engine operation
at the rated rpm.
Replace
For applications that require multiple drive belts,
replace the drive belts in matched sets. Replacing
one drive belt of a matched set will cause the new
drive belt to carry more load because the older drive
belts are stretched. The additional load on the new
drive belt could cause the new drive belt to fail.
To replace the alternator belt, refer to Disassembly
and Assembly, Alternator Belt - Remove and Install.
To replace the fan belts, refer to Disassembly and
Assembly, V-Belts- Remove and Install.
Belt Tension
Table 16
Belt Type
Alternator
belt
Fan Belt
Note: Do not set the belt tension when the belts are
g06109234
hot.
Belts - Inspect/Replace
(General Information for Poly
Vee Belts)
The polly vee belt may also be called the micro rib
belt.
Maintenance Section
Belts - Inspect/Replace
Alternator and Fan Belt Tension
Belt Size
New Belt
Used Belt
Tension
Tension
with fewer
than 10
Hours in
Operation
10 mm
645 ± 44
512 ± 44
(0.39370
N
N
inch)
(145 ± 10
(115 ± 10.
lb)
lb)
801 ± 44
645 ± 44
5V/5VX
N
N
15 mm
(180 ± 10
(145 ± 10
(0.59055
lb)
lb)
inch)
83
Reset Belt
Tension
311 ± 44
N
(70 ± 10
lb)
378 ± 44
N
(85 ± 10
lb)
i06942621
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