discharge the hot
discharge the hot
water
water
.
.
11-38
11-38
Pretrip inspection and
Pretrip inspection and
maintenance
maintenance
Repeat this procedure until the water is free of
Repeat this procedure until the water is free of
dirt, scale, and debris.
dirt, scale, and debris.
CAUTION
CAUTION
If the radiator lines are clogged or the coolant is
If the radiator lines are clogged or the coolant is
badly contaminated, bring your vehicle to an
badly contaminated, bring your vehicle to an
authorized Sterling service
authorized Sterling service
facility
facility
.
.
8.
8.
Mak
Mak
e sure
e sure
the rad
the rad
iator
iator
petco
petco
ck an
ck an
d engin
d engin
e drain
e drain
plug are securely fitted.
plug are securely fitted.
9.
9.
T
T
il
il
t t
t t
he
he
ca
ca
b.
b.
10.
10.
Add coolant in the corr
Add coolant in the corr
ect mixing ratio up to the
ect mixing ratio up to the
brim of the pressure cap opening. Pour the
brim of the pressure cap opening. Pour the
cool-
cool-
ant slowly to prevent air from mixing with it.
ant slowly to prevent air from mixing with it.
11.
11.
Check that the coolant level at the pres
Check that the coolant level at the pres
sure cap
sure cap
opening does not go down. Install the pressure
opening does not go down. Install the pressure
cap and lock it into place (turn it clockwise until it
cap and lock it into place (turn it clockwise until it
is tight and insert the
is tight and insert the
spring fastener).
spring fastener).
CAUTION
CAUTION
If air is not completely removed from the cool-
If air is not completely removed from the cool-
ing system, this may lead to reduced cooling
ing system, this may lead to reduced cooling
efficiency and engine parts failure. After replac-
efficiency and engine parts failure. After replac-
ing the coolant, drive the vehicle and then check
ing the coolant, drive the vehicle and then check
the coolant level.
the coolant level.
12.
12.
Lower t
Lower t
he cab.
he cab.
13.
13.
Fill the surge tank with c
Fill the surge tank with c
oolant in the correct
oolant in the correct
mixing ratio to the “FULL” mark. Install the
mixing ratio to the “FULL” mark. Install the
surge
surge
tank cap and make sure it is tight.
tank cap and make sure it is tight.
14.
14.
Star
Star
t the engine and keep it running at a speed
t the engine and keep it running at a speed
slightly higher than normal idle. This will remove
slightly higher than normal idle. This will remove
air from the cooling system. When the engine
air from the cooling system. When the engine
reaches normal operating temperature, allow
reaches normal operating temperature, allow
the engine to idle for 10 minutes longer before
the engine to idle for 10 minutes longer before
shutting it down.
shutting it down.
15.
15.
When the engine has cooled, open t
When the engine has cooled, open t
he pressure
he pressure
cap and, if the coolant level
cap and, if the coolant level
is too low, add cool-
is too low, add cool-
ant until it reaches the top of the pressure cap
ant until it reaches the top of the pressure cap
opening.
opening.
CAUTION
CAUTION
Tighten the pressure cap before operating the
Tighten the pressure cap before operating the
engine. If the cap is loose, coolant will overflow
engine. If the cap is loose, coolant will overflow
as the engine temperature rises.
as the engine temperature rises.
16.
16.
Screw the pressure ca
Screw the pressure ca
p down tightly. T
p down tightly. T
urn it
urn it
clockwise.
clockwise.
Press in the spring fastener to lock the
Press in the spring fastener to lock the
pressure
pressure
cap.
cap.
17.
17.
Run the engine a few more minute
Run the engine a few more minute
s to make
s to make
sure that there are no
sure that there are no
coolant leaks.
coolant leaks.
18.
18.
Make sure that the coolant leve
Make sure that the coolant leve
l in the reservoir
l in the reservoir
tank is in the specified range. Add coolant if nec-
tank is in the specified range. Add coolant if nec-
essary.
essary.
Z12450
Z12450
Z12076
Z12076
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