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Introduction. The cooling system cools the
Introduction.
engine. e. Ref
engin
Refer t
er to o Section 9A
cooling and Section 15C
cooling and
Section 15C for the wet disc brakes
cooling system to find more detailed cooling infor-
cooling system to find more detailed cooling infor-
mation on these particular systems.
mation on these particular systems.
Major Components (Illustration 5-5)
Major Components
cooling system consists of coolant, radiator /
cooling system consists of coolant, radiator /
charge air cooler, piping connecting the radiator to
charge air cooler, piping connecting the radiator to
the engine and a water pump to circulate the cool-
the engine and a water pump to circulate the cool-
ant. A coolant fil
ant.
A coolant filter
filter and condition the coolant.
filter and condition the coolant.
Operation
Operation (Illustration 5-5)
(Illustration 5-5). . When the engine is
started, the water pump draws coolant from the
started, the water pump draws coolant from the
radiator into the engine block.
radiator int
o the engine block. The coolant is c
culated through the engine and the coolant filter
culated through the engine and the coolant filter
until it reaches a temperature of approximately
until it reaches a temperature of approximately
180
180
_ _
F, at which point the thermostat will start to
F, at which point the thermostat will start to
open. This wi
open.
This will allow c
of the radiator cor
of the radiator core. e. Air trapped in the cool
travel to the top of the deairation space by means
travel to the top of the deairation space by means
of the deaeration line and an internal deaeration
of the deaeration line and an internal deaeration
stand tube.
stand tube. Coolant is
deaeration tank to displace the removed air by
deaeration tank to displace the removed air by
way of the make-up line.
way of the make-up line.
Coolant. The cooling system of this equipment is
Coolant.
The cooling system of this equipment is
protected to -34
protected to -34
The solution is a 50 - 50 mixture of ethylene glycol
The solution is a 50 - 50 mixture of ethylene glycol
base antifreeze to water solut
base antifreez
in the coolant mixture.
in the coolant mi
50% solution be maintained year round.
50% solution be maintained year round.
A A proper
proper coolant
coolant / / SCA
Additive)
Additive) additive
additive concentration
tained to prevent liner pitting, corrosion and scale
tained to prevent liner pitting, corrosion and scale
deposits in the cooling system
deposits in the cool
Cummins QSM11 Engine Operation and Mainte-
Cummins QSM11 Engine Operation and Mainte-
nance Manual for coolant additive concentration.
nance Manual for coolant additive concentration.
The coolant additive concentration level may be
The coolant additive concentration level may be
tested with a coolant test kit, Taylor part number
tested with a coolant test kit, Taylor part number
1006-175.
1006-175.
CAUTION: Insufficient concentration of
CAUTION:
the coolant additives will result in liner pitting
the coolant additives will result in liner pitting
and engine failur
and engine
Coolant Filter
Coolant Filter (Illustration 5-1)
is used in the cooling system to control the water
is used in the cooling system to control the water
acidity, soften the water to reduce scale formation,
acidity, soften the water to reduce scale formation,
filter out suspended materials and add a corrosion
filter out suspended materials and add a corrosion
inhibiting chemical to the coolant which provides a
inhibiting chemical to the coolant which provides a
protective film on the water passages.
protective film on the water passages.
The cooling system cools the
Section 9A for transmission
for transmission
for the wet disc brakes
(Illustration 5-5). . The engine
ter, remote mount
, remote mounted, is used to
ed, is used to
When the engine is
The coolant is cir- ir-
ll allow coolant flow bac
oolant flow back into the top
Air trapped in the coolant will
Coolant is made avail
made available from t
able from the
F (-36
F (-36
C) and 228
C) and 228
_ _
_ _
_ _
e to water solution.
ion. Use soft wa
Use soft water
xture. It is recom
It is recommended that
mended that
SCA (Supplement
(Supplemental al Coolant
concentration must
must be
ing system. . Refer to the
Refer to the
Insufficient concentration of
failure. e.
(Illustration 5-1). . The coolant filter
The coolant filter
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additives must not be used with the coolant
additives must not be used with the coolant
filter because it will clog the element.
filter because it will clog the element.
The engine
k into the top
ant will
he
F (108.9
F (108.9
C).
C).
_ _
ter
Radiator / Charge Air Cooler
Radiator / Charge Air Cooler (Illustration 5-4)
The radiator is comprised of a deaeration tank,
The radiator is comprised of a deaeration tank,
core, and a charge air cooler
core, and a charge air c
Coolant
tank functions as a cool
tank functi
be main-
main-
adding coolant to the system, coolant should be
adding coolant to the system, coolant should be
added to the deaeration tank.
added to the deaerati
deaeration tank is supplied through a 7 psi radia-
deaeration tank is supplied through a 7 psi radia-
tor cap located on the left side of the radiator,
tor cap located on the left side of the radiator,
above the radiator sight gl
above the radiat
coolant level is to be maintained by the coolant
coolant level is to be maintained by the coolant
sight glasses below the 7 psi radiator cap.
sight glasses below the 7 psi radiator cap.
The radiator is force-air-
The radiator is for
core is supplied through a 15 psi radiator cap
core is supplied through a 15 psi radiator cap
located on the right side of the radiator
located on the right s
cooling system has been completely drained, the
cooling system has been completely drained, the
15 psi radiator cap neck will allow a quicker, more
15 psi radiator cap neck will allow a quicker, more
efficient method of refilling the cooling system.
efficient method of refilling the cooling system.
Charge Air Cooler (Illustration 5-4)
Charge Air Cooler
engine is equipped with a trubocharger. The
engine is equipped with a trubocharger. The
turbocharger is driven by the exhaust from the
turbocharger is driven by the exhaust from the
engine. The exhaust turbine of the turbocharger is
engine. The exhaust turbine of the turbocharger is
coupled to the intake turbi
coupled to the in
drives the intake turbine. The intake turbine com-
drives the intake turbine. The intake turbine com-
CAUTION: Coolant containing anti-leak
CAUTION:
Coolant containing anti-leak
Illustration 5-1.
Illustr
ation 5-1. Coolant Fi
Coolant Filter
ooler. . The deaeration
ons as a coolant storage t
ant storage tank.
on tank. Access t
or sight glasses.
asses. The radiator
ce-air-cooled.
cooled. Access to the
ide of the radiator. . When the
(Illustration 5-4). . The QSM11
take turbine.
ne. The exhaust t
Section 5
Section 5
Cooling System
Cooling System
CUT-OFF
CUT-OFF
VALVES
VALVES
COOLANT
COOLANT
FILTER
FILTER
lter
(Illustration 5-4). .
The deaeration
ank. When
When
Access to the
o the
The radiator
Access to the
When the
The QSM11
The exhaust turbine
urbine
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