Z12076
Z12076
11-39
11-39
An
An
excessively loose
excessively loose
or
or
tight
tight
belt
belt
could
could
cause
cause
the
the
engine to overheat, the battery to be inadequately
engine to overheat, the battery to be inadequately
charged, or the alternator or water pump to mal-
charged, or the alternator or water pump to mal-
function. Always keep the belt adjusted to the
function. Always keep the belt adjusted to the
proper tension.
proper tension.
CAUTION
CAUTION
Do not allow the drive belt to come in contact
Do not allow the drive belt to come in contact
with oil or grease during this procedure.
with oil or grease during this procedure.
If soiled with oil or grease, the belt will slip,
If soiled with oil or grease, the belt will slip,
shortening its service life.
shortening its service life.
1
1
C
C
h
h
e
e
c
c
k
k
1.
1.
Set the p
Set the p
arkin
arkin
g brak
g brak
e and ch
e and ch
ock t
ock t
he fron
he fron
t tires
t tires
.
.
Tilt the cab.
Tilt the cab.
P. 11-4
P. 11-4
2.
2.
Pres
Pres
s the b
s the b
elt wit
elt wit
h a forc
h a forc
e of aro
e of aro
und 22 l
und 22 l
b (98 N)
b (98 N)
at the point midway between the pulleys, and
at the point midway between the pulleys, and
measure the amount of deflection.
measure the amount of deflection.
3.
3.
If nec
If nec
essa
essa
ry
ry
, adjus
, adjus
t the belt t
t the belt t
ensio
ensio
n until th
n until th
e belt
e belt
deflection is within the limits given in the table
deflection is within the limits given in the table
below.
below.
4.
4.
Chec
Chec
k the b
k the b
elt for
elt for
damag
damag
e. Rep
e. Rep
lace t
lace t
he belt i
he belt i
f
f
damage is found.
damage is found.
Drive belt checking and adjusting
Drive belt checking and adjusting
Inspection
Inspection
intervals
intervals
Daily pretrip inspection and
Daily pretrip inspection and
every 6000 miles (10 000 km)
every 6000 miles (10 000 km)
or every 12 months
or every 12 months
WARNING
WARNING
Always shut down the engine before inspect-
Always shut down the engine before inspect-
ing or adjusting belts. A moving drive belt
ing or adjusting belts. A moving drive belt
can cause a serious injury or loss of life.
can cause a serious injury or loss of life.
Ensure that the engine cannot be started
Ensure that the engine cannot be started
while you are performing checks or adjust-
while you are performing checks or adjust-
ments.
ments.
Belt tension
Belt tension
[Amount of deflection when the belt
[Amount of deflection when the belt
is pressed
is pressed
with a force of 22 lb (98 N) at the point
with a force of 22 lb (98 N) at the point
midway between the pulleys]
midway between the pulleys]
Drive
Drive
belt
belt
Vehicles
Vehicles
without air
without air
conditioner
conditioner
New belt (when installed):
New belt (when installed):
0.35 to 0.43 in
0.35 to 0.43 in
(9 to 11 mm)
(9 to 11 mm)
Used belt (when inspected
Used belt (when inspected
or reinstalled): 0.43 to 0.51
or reinstalled): 0.43 to 0.51
in (11 to 13 mm)
in (11 to 13 mm)
Vehicles
Vehicles
with air
with air
conditioner
conditioner
New belt (when installed):
New belt (when installed):
0.28 to 0.35 in (7 to 9 mm)
0.28 to 0.35 in (7 to 9 mm)
Used belt (when inspected
Used belt (when inspected
or reinstalled): 0.39 to 0.43
or reinstalled): 0.39 to 0.43
in (10 to 11 mm)
in (10 to 11 mm)
Z11933
Z11933
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