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Section IV. MAINTENANCE OF THE ENGINE
3-7.
Servicing
3-6.
General
Check the crankcase oil level daily as described in
The engine is a conventional valve-in-head, four cycle,
liquid cooled, internal combustion type. A gear type oil
pump supplies lubricating oil to the moving parts of the
engine.
Section V. MAINTENANCE OF THE AIR CLEANER
3-9.
Servicing
3-8.
General
The air cleaner should be serviced at the recommended
The oil bath type air cleaner is mounted on the left side
intervals or more frequently under dusty conditions.
of the engine and is connected to the carburetor by a
Refer to paragraph 3-2 (e) for a servicing procedure.
flexible hose.  It prevents harmful dust and foreign
The air cleaner and connections should always be tightly
particles from entering the carburetor and engine. Air
secured to prevent dust or dirt entry.
enters the air cleaner and passes through an oil bath
before entering the carburetor.
Caution: Never run the engine with the air
cleaner removed.
Section VI. MAINTENANCE OF THE FUEL TANK
3-11.  Servicing
3-10.  General
At periodic intervals remove the filler assembly from the
The capacity of the fuel tank is 8.3 gallons.  Always
top of the tank and clean the strainer.  Also remove
clean the area around the fuel tank before refilling. Fill
drain plug from the bottom of the tank and allow
the tank at the end of each operating period to keep
sediment or water to drain out.
condensation to a minimum.
Section VII. MAINTENANCE OF THE RADIATOR
a. Remove the mounting bolts which secure the
3-12.  General
grille to the counterweight and remove the grille.
The radiator is of the fin and tube type, utilizing a
b. Clean the radiator fins with an air blast carrying a
pressure filler cap which maintains a pressure of
grease solvent, such as oleum spirits, directed at the
approximately 4 psi. An overflow tube is provided on
radiator core and passing through the grille side.
the radiator to allow the escape of coolant and / or
c. Reinstall the radiator grille in the reverse order of
pressure when the pressure raises above the limit of the
pressure cap.
removal.
d. When servicing the system for warm weather
operation, add a rust inhibitor to the water. Follow the
3-13.  Servicing
directions on the container.
Warning:  Provide adequate ventilation of the
working area during the cleaning operation to avoid
possible toxic effects of the cleaning spray. Never
use gasoline, fuel oil, or kerosene to clean the
radiator.
3-4

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