Taylor THDC-954, Maintenance Manual

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5-1 5-1 THDC / THDCP - 954 / 955 / 974 (Rev. 06/03) THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
presses the intak presses the intake air e air. . The act of compress The act of compressing the ing the
intake air generates heat and causes the air mole- intake air generates heat and causes the air mole-
cules to
cules to expand. T expand. To o increas increase e combusti combustion on effic efficien- ien-
cy, a charge air cooler is integrated into the radia- cy, a charge air cooler is integrated into the radia-
tor
tor. . The charge air cooler is an air to air cooler The charge air cooler is an air to air cooler..
By reducing the temperature of the intake air By reducing the temperature of the intake air
before it enters the piston chamber, the air
before 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 be
The 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 the
The more oxygen in the chamber, the hotter the
combust
combustion cycle becomes ion cycle becomes. . This resul This results in a more ts in a more
complete burning of the fuel, emitting fewer pollu- complete burning of the fuel, emitting fewer pollu-
tants.
tants. This incr This increase in combustion effic ease in combustion efficiency also iency 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.
Checkin Checking g The Coolant Level The Coolant Level (Illustration 5-2) (Illustration 5-2) ..
The coolant level should be checked daily with the The coolant level should be checked daily with the
engine cool.
engine cool. The coolant lev The coolant level is full w el is full when the hen the
coolant is visible at the center of the upper coolant coolant is visible at the center of the upper coolant
sight glass on the radiator sight glass on the radiator. . If the coolant level is If 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 of
ant 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 operation ments 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 corrosi corrosion inhibi on inhibited ted
coolant. coolant.
2. 2. Maintain Maintain prescr prescribed i ibed inhibitor nhibitor strength. strength.
3. 3. Use low Use low silic silicate antifr ate antifreeze wit eeze with an ethyl h an ethylene ene
glycol base. glycol base.
4. 4. Always Always follow follow the man the manufacturer’s ufacturer’s recomm recommen- en-
dations on inhi dations on inhibitor usage and handl bitor usage and handling. ing. Refer Refer
to the engine operation and maintenance to the engine operation and maintenance
manual for coolant requirements.
manual for coolant requirements.
5. 5. Do N Do Not us ot use so e solubl luble oi e oil! l!
6. 6. Seale Sealer type ant r type antifr ifreeze sh eeze should No ould Not be used. t be used.
Changing the Coolant Filter. Changing the Coolant Filter. Refer to the engine Refer to the engine
operation and maintenance manual for the coolant operation and maintenance manual for the coolant
filter ch
filter change interval. ange interval. Perform the foll Perform the following proce- owing proce-
dures to replace the coolant filter. dures to replace the coolant filter.
WARNING: WARNING: Shut down the engine and Shut down the engine and
allow the engine to cool before changing the allow the engine to cool before changing the
coolant filter.
coolant filter.
CAUTIONS: CAUTIONS:
SS
Dispose of coolan Dispose of coolant filter in accordance with t filter in accordance with
federal and federal and local regulation local regulations. s.
SS
Do not use a strap wrench to tighten the Do not use a strap wrench to tighten the
coolant filter coolant filter. . Mechani Mechanical over-tight cal over-tightening ening
may distort the threads or damage the filter may distort the threads or damage the filter
gasket.
gasket.
1. 1. Close bot Close both cut-of h cut-off valv f valves (Il es (Illustrat lustration 5-1). ion 5-1).
2. 2. Rem Remove the c ove the coolan oolant fil t filter ter. . It ma It may be poss y be possibl ible e
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. Cle Clean the gask an the gasket sur et surface of th face of the filt e filter base er base..
4. 4. Apply a lig Apply a light fil ht film of lubri m of lubricati cating oil to the gaske ng oil to the gaskett
sealing surface of the new coolant filter. sealing surface of the new coolant filter.
5. 5. Scr Screw the new co ew the new coolant f olant filt ilter onto th er onto the filt e filter er
base until the gasket comes in contact with the base until the gasket comes in contact with the
filter base and then tighten filter 1/2 to 3/4 turn
filter base and then tighten filter 1/2 to 3/4 turn
by hand only. by hand only.
6. 6. Open t Open the cut he cut-of -off va f valves lves..
7. 7. Star Start up engin t up engine and chec e and check for l k for leaks at t eaks at the he
coolant filter base. coolant filter base.
Drain Draining / ing / Flushi Flushing The ng The Cooli Cooling System. ng System. The The
cooling system should be drained and flushed cooling system should be drained and flushed
every 2 years or 6000 hours, whichever comes
every 2 years or 6000 hours, whichever comes
first
first. . The cooling sy The cooling system is dr stem is drained by opening ained 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 to
Removal of the 15 psi radiator cap will allow air to
enter the cooling passages, decreasing drain time
enter the cooling passages, decreasing drain time
and ensuring that the coolant drains completely
and ensuring that the coolant drains completely
from the sy
from the system. stem. Leave the drain cock open unti Leave 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 engine Shut down the engine and allow the engine
to cool before opening the radiator cap and
to cool before opening the radiator cap and
the drain cock to drain the cooling system.
the drain cock to drain the cooling system.
SS
Coolan Coolant should only be added to the cooling t should only be added to the cooling
system when the engine has been shut down system when the engine has been shut down
and allowe
and allowed to cool d to cool. . Failur Failure to do so may e to do so may
result in personal injury from heated coolant result in personal injury from heated coolant
spray.
spray.
SS
Dispose of coolan Dispose of coolant in accordance with t in accordance with
federal and federal and local regulation local regulations. s.
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