presses the intakpresses the intake aire air. . The act of compressThe act of compressing theing the
intake air generates heat and causes the air mole-intake air generates heat and causes the air mole-
cules to cules to expand. Texpand. To o increasincrease e combusticombustion on efficefficien-ien-
cy, a charge air cooler is integrated into the radia-cy, a charge air cooler is integrated into the radia-
tortor. . The charge air cooler is an air to air coolerThe charge air cooler is an air to air cooler..
By reducing the temperature of the intake airBy reducing the temperature of the intake air
before it enters the piston chamber, the airbefore it enters the piston chamber, the air
becomes denser (the air molcules get smaller).becomes denser (the air molcules get smaller).
The denser the air, the more oxygen that will beThe denser the air, the more oxygen that will be
present in the piston chamber during combustion.present in the piston chamber during combustion.
The more oxygen in the chamber, the hotter theThe more oxygen in the chamber, the hotter the
combustcombustion cycle becomesion cycle becomes. . This resulThis results in a morets in a more
complete burning of the fuel, emitting fewer pollu-complete burning of the fuel, emitting fewer pollu-
tants. tants. This incrThis increase in combustion efficease in combustion efficiency alsoiency also
creates lower engine operating temperatures,creates lower engine operating temperatures,
which pro-long the life of the engine and it’s com-which pro-long the life of the engine and it’s com-
ponents.ponents.
CheckinChecking g The Coolant LevelThe Coolant Level(Illustration 5-2)(Illustration 5-2)..
The coolant level should be checked daily with theThe coolant level should be checked daily with the
engine cool. engine cool. The coolant levThe coolant level is full wel is full when thehen the
coolant is visible at the center of the upper coolantcoolant is visible at the center of the upper coolant
sight glass on the radiatorsight glass on the radiator. . If the coolant level isIf the coolant level is
visible at the lower coolant sight glass, add cool-visible at the lower coolant sight glass, add cool-
ant until the coolant level is visible at the center ofant until the coolant level is visible at the center of
the upper coolant sight glass on the radiator.the upper coolant sight glass on the radiator.
Cooling Requirements.Cooling Requirements. The following require-The following require-
ments must be followed for trouble-free operationments must be followed for trouble-free operation
of the cooling system.of the cooling system.
1. 1. Always Always use a use a properly properly corrosicorrosion inhibion inhibitedted
coolant.coolant.
2. 2. Maintain Maintain prescrprescribed iibed inhibitor nhibitor strength.strength.
3. 3. Use low Use low silicsilicate antifrate antifreeze witeeze with an ethylh an ethyleneene
glycol base.glycol base.
4. 4. Always Always follow follow the manthe manufacturer’s ufacturer’s recommrecommen-en-
dations on inhidations on inhibitor usage and handlbitor usage and handling. ing. ReferRefer
to the engine operation and maintenanceto the engine operation and maintenance
manual for coolant requirements.manual for coolant requirements.
5. 5. Do NDo Not usot use soe solublluble oie oil!l!
6. 6. SealeSealer type antr type antifrifreeze sheeze should Noould Not be used.t be used.
Changing the Coolant Filter.Changing the Coolant Filter. Refer to the engineRefer to the engine
operation and maintenance manual for the coolantoperation and maintenance manual for the coolant
filter chfilter change interval. ange interval. Perform the follPerform the following proce-owing proce-
dures to replace the coolant filter.dures to replace the coolant filter.
WARNING:WARNING:Shut down the engine andShut down the engine and
allow the engine to cool before changing theallow the engine to cool before changing the
coolant filter.coolant filter.
CAUTIONS:CAUTIONS:
SS
Dispose of coolanDispose of coolant filter in accordance witht filter in accordance with
federal and federal and local regulationlocal regulations.s.
SS
Do not use a strap wrench to tighten theDo not use a strap wrench to tighten the
coolant filtercoolant filter. . MechaniMechanical over-tightcal over-tighteningening
may distort the threads or damage the filtermay distort the threads or damage the filter
gasket.gasket.
1. 1. Close botClose both cut-ofh cut-off valvf valves (Iles (Illustratlustration 5-1).ion 5-1).
2. 2. RemRemove the cove the coolanoolant filt filterter. . It maIt may be possy be possibliblee
to unscrew the coolant filter by hand; however,to unscrew the coolant filter by hand; however,
a band type filter wrench may be used if nec-a band type filter wrench may be used if nec-
essary.essary.
3. 3. CleClean the gaskan the gasket suret surface of thface of the filte filter baseer base..
4. 4. Apply a ligApply a light filht film of lubrim of lubricaticating oil to the gaskeng oil to the gaskett
sealing surface of the new coolant filter.sealing surface of the new coolant filter.
5. 5. ScrScrew the new coew the new coolant folant filtilter onto ther onto the filte filterer
base until the gasket comes in contact with thebase until the gasket comes in contact with the
filter base and then tighten filter 1/2 to 3/4 turnfilter base and then tighten filter 1/2 to 3/4 turn
by hand only.by hand only.
6. 6. Open tOpen the cuthe cut-of-off vaf valveslves..
7. 7. StarStart up engint up engine and chece and check for lk for leaks at teaks at thehe
coolant filter base.coolant filter base.
DrainDraining / ing / FlushiFlushing The ng The CooliCooling System.ng System. TheThe
cooling system should be drained and flushedcooling system should be drained and flushed
every 2 years or 6000 hours, whichever comesevery 2 years or 6000 hours, whichever comes
firstfirst. . The cooling syThe cooling system is drstem is drained by openingained by opening
the drain cock on the bottom of the radiator.the drain cock on the bottom of the radiator.
Removal of the 15 psi radiator cap will allow air toRemoval of the 15 psi radiator cap will allow air to
enter the cooling passages, decreasing drain timeenter the cooling passages, decreasing drain time
and ensuring that the coolant drains completelyand ensuring that the coolant drains completely
from the syfrom the system. stem. Leave the drain cock open untiLeave the drain cock open untill
all coolant has been allowed to drain from the sys-all coolant has been allowed to drain from the sys-
tem.tem.
WARNINGS:WARNINGS:
SS
Shut down the engine and allow the engineShut down the engine and allow the engine
to cool before opening the radiator cap andto cool before opening the radiator cap and
the drain cock to drain the cooling system.the drain cock to drain the cooling system.
SS
CoolanCoolant should only be added to the coolingt should only be added to the cooling
system when the engine has been shut downsystem when the engine has been shut down
and alloweand allowed to coold to cool. . FailurFailure to do so maye to do so may
result in personal injury from heated coolantresult in personal injury from heated coolant
spray.spray.
SS
Dispose of coolanDispose of coolant in accordance witht in accordance with
federal and federal and local regulationlocal regulations.s.
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