TM 5-3810-207-20/TO 36C23-3-37-12
Section III. CRANE ENGINE COOLING SYSTEM
95. General
The engine temperature is controlled by the
circulation of coolant through the coolant pump, which
forces the coolant through the engine water jackets and
back into the radiator for cooling. Until the engine is up
to operating temperature, all or part of the coolant
leaving the engine is bypassed, by means of a
thermostat, directly to the pump for recirculation.
Draincocks are located on the bottom of the radiator and
on the forward, left side of the engine block.
96. Hose, Lines, and Fittings
a.
Removal.
(1)
Drain the cooling system (TM 5 3810-207-
10).
(2)
Remove the hose, lines, and fittings as
instructed on figure 33.
b.
Cleaning and Inspection.
(1)
Clean all parts with an approved
cleaning solvent.
(2)
Inspect hose and fittings for cracks,
breaks, and other damage. Replace all
defective parts.
c.
Installation.
(1)
Install the hose, lines, and fittings as
illustrated on figure 33.
(2)
Fill radiator with coolant (TM 5-3810-207-
10).
97.
Thermostat Housing Assembly
a.
Removal.
(1)
Remove the radiator-thermostat housing
hose and pipe assembly (par. 96).
(2)
Remove
the
thermostat
housing
as
instructed on figure 34.
b.
Cleaning and Inspection.
(1)
Clean all parts thoroughly.
(2)
Inspect the thermostat housing for breaks,
cracks, and other damage. Replace
defective thermostat housing.
c.
Installation.
(1)
Install
the
thermostat
housing
as
illustrated on figure 34.
(2)
Install the pipe assembly and radiator-to-
thermostat housing hose (par. 96).
98. Thermostat Assembly
a.
Removal.
(1)
Remove the thermostat housing (par.
97).
(2)
Remove the thermostat assembly as
instructed on figure 35.
b.
Cleaning and Inspection.
(1)
Clean the thermostat in an approved
cleaning solvent.
(2)
Inspect the thermostat and gasket for
proper
function
and
other
damage.
Replace defective thermostat.
c.
Test. Test the thermostat for opening and
closing range of 165°
to 180
o F. by placing the
thermostat in a container of water that can be heated
and checked with an accurate thermometer. If the
thermostat opens before 165 °
F., closes after 180
o
F.,
or does not open or close at all, replace the thermostat.
d.
Installation.
(1)
Install the thermostat as illustrated on
figure 35.
(2)
Install the thermostat housing (par. 97).
99. Radiator Shroud and Fan Guard
a.
Removal. Remove radiator shroud and fan
guard as instructed on figure 36.
b.
Cleaning and Inspection.
(1)
Clean the radiator shroud and fan guard
with an approved cleaning solvent.
(2)
Inspect the shroud for breaks, bends, and
other damage. Replace defective shroud.
c.
Installation. Install the radiator shroud and fan
guard as illustrated on figure 36.
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