TM 5-3895-359-14&P
SUBSECTION 14 GASOLINE PUMP ENGINE
FUEL STRAINER (Fig. 3)
A fuel strainer is very necessary to prevent sediment,
COMPONENT DESCRIPTION AND MAINTENANCE
dirt and water from entering the carburetor and causing
OIL FILTER
trouble or even complete stoppage of the engine. The
A by-pass type oil filter is furnished on these engines.
strainer has a glass bowl and should be inspected
The oil filtering cartridge should be replaced after every
frequently and cleaned if dirt or water are present. To
other oil change. If operating conditions are extremely
remove bowl, first shut off fuel valve, then loosen the
dusty, replace cartridge after every oil change.
knurled nut below bowl and swing the wire bail to one
AIR CLEANERS
side. After cleaning bowl and screen, reassemble the
The air cleaner is an essential accessory, filtering the air
parts, being sure the gasket is in good condition;
entering the carburetor and preventing abrasive dirt
otherwise use a new gasket. See Fig. 3.
from entering the engine and wearing out valves and
piston rings in a very short time.
The air cleaner must be serviced frequently, depending
on the dust conditions where engine is operated. Check
hose connections for leaks or breaks; replace all broken
or damaged hose clamps.
Excessive smoke or loss of power are good indications
the air cleaner requires attention.
The oil bath type air cleaner, illustrated in Fig. I is
standard equipment.
OIL BATH AIR CLEANER (Fig. 1)
Service daily or twice a day; if engine is operating in
very dusty conditions.
Once each week; in
comparatively clean conditions.
Remove oil cup from bottom of air cleaner and clean
FIGURE 2
thoroughly. Add fresh oil to the level line indicated on
cup, using the same grade oil as used in engine
Operating the engine under dusty
conditions without oil in the air
cleaner or with dirty oil, may wear
out cylinders, pistons, rings and
bearings in a few days time, and
result in costly repairs.
Once a year; or oftener in very dusty conditions, the air
cleaner should be removed from the engine and the
element, which is not removable, should be washed in a
solvent to clean out accumulated dust and dirt.
FIGURE 3
CARBURETOR ADJUSTMENT
The main metering jet in the carburetor is of the fixed
type, that is, it requires no adjustment. The idle needle
should be adjusted for best low speed operation, while
carburetor throttle is closed by hand. For illustrations
and more information, see Walbro
FIGURE 1
14-1
