(3) Gradually heat the water while stirring to
(1) Clean thermostat and housing with an ap-
evenly distribute the heat.
(2) Inspect thermostat for cracks, corrosion,
(4) Observe the thermometer and the ther-
accumulations of stale or rust, and other damage.
mostat. If the thermostat is operating properly, it
(3) Inspect housing for cracks, corrosion,
should begin opening when the water temperature
and other damage.
reaches 177 F (80. 6 C) and be fully open at 205F
(1) Suspend thermostat in a container of
water so that it is completely immersed but not
(5) Replace the thermostat if it fails to
touching the bottom or sides of the container.
(2) Suspend a reliable thermometer so that
Its temperature sensing end is immersed but not
tmchtng the bottom or sides of the contatner.
d. Installation. Install thermostat in reverse
order of removal procedures.
Do not overheat as damage to the thermo-
stat may result.
ORGANIZATIONAL WTENANCE OF THE ENGINE LUBRICATION SYSTEM
(2) Disconnect hose assemblies (2 and 3)
from the filter assembly.
The oil pan serves as a cover for the bottom of
the crankcase and, also, as a reservoir for engine
lubricating oil. It is equipped with a bayonet type
washers (6) and screws (7).
oil gauge which is used to measure the oil level in
the pan. Oil is drawn into a gear type, positive dis-
(9) and mounting bracket (10) unless inspection re-
placement pump through a large screen which pre-
vents the entry of coarse abrasives. The oil pump
forces the oil through a full flow type oil filter
which removes minute abrasive particles. A pres-
oil filter, measures the pump output pressure and
(1) Remove elbows (11 and 12).
transmits it electrically to the engine oil pressure
gauge. From the oil filter, the oil enters the header,
(2) Remove square nut (13), flat washer (14)
a drilled passage in the engine block. A pressure
and screw (15) to remove clamp (16) from filter as-
switch measures the oil pressure in the header and
automatically shuts down the engine if the pressure
falls to a dangerously low level. From the header,
the otl is distributed to the internal moving parts of
the cdl filter assembly.
the engine. No organizational matrdenance is allo-
cated for the oil pan and oil pump. Refer to para-
c. Cleaning and Inspection
graph 3-72 for organizational maintenance of the oil
(1) Clean oil filter assembly parts with dry
organizational maintenance of the low oil pressure
cleaning solvent (Federal specification P-D-680).
(2) Inspect mounting bracket (10) for cracks,
LUBRICATION OF OIL FILTER ASSEMBLY
corrosion, and other damage.
(3) Inspect oil line assemblies for clogging,
(4) Check all threads for stripping or other
allow the oil to drain into a suitable container.