• Inspect the belt for cracks, splits, glazing, grease,
displacement of the cord and evidence of fluid
contamination.
The belt must be replaced if the following conditions
are present.
• The belt has a crack in more than one rib.
• More than one section of the belt is displaced in
one rib of a maximum length of 50.8 mm (2 inch).
To replace the belt, refer to Disassembly and
Assembly, “Alternator Belt - Remove and Install”. If
necessary, replace the belt tensioner. Refer to
Disassembly and Assembly, “Alternator Belt -
Remove and Install” for the correct procedure.
i07382084
Belt
Tensioner
-
Check
Illustration 34
g06302365
Typical example
1.
Remove the belt. Refer to Disassembly and
Assembly, “Alternator Belt - Remove and Install”.
2.
Ensure that the belt tensioner (2) is securely
installed. Visually inspect the belt tensioner for
damage. Check that the pulley on the tensioner
rotates freely and that the bearing is not loose.
3.
Some engines have an idler pulley (2). Ensure that
the idler pulley is securely installed. Visually
inspect the idler pulley for damage. Ensure that
the idler pulley can rotate freely and that the
bearing is not loose.
Illustration 35
g06302436
Typical example
(A) Tensioner stop
(3) Tensioner body stop
(B) Tensioner stop
4.
Ensure that the tensioner has full movement of
travel from stop (A) the other stop (B). Using a
constant force the tensioner should move
smoothly between the tensioner stop and the
tensioner body stop.
5.
If necessary, replace damaged components.
Install the belt. Refer to Disassembly and Assembly,
“Alternator Belt - Remove and Install”.
i07383167
Coolant
(Commercial
Heavy-
Duty)
-
Change
Note:
This
procedure
is
for
coolants
that
meets
a
commercial
heavy-duty
coolant
specification
of
“
ASTM
D6210
”
.
Clean
the
cooling
system
and
flush
the
cooling
system
before
the
recommended
maintenance
interval
if
the
following
conditions
exist:
• The engine overheats frequently.
• Foaming is observed.
• The oil has entered the cooling system and the
coolant is contaminated.
76
M0125147