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 Preventive Maintenance Instructions given in this
3-41. SHELTER. The truck should be sheltered in
manual.
a closed building with some heat, if possible. If this
is not possible, cover with a tarpaulin or similar
o. Avoid overloading the truck - this is a
kind of material.
hazardous practice, for the operator as well as the
e q u i p m e n t . Overloading shortens the life of the
3-42. COOLING SYSTEM. Add proper amount
truck and increases maintenance.
of ethylene glycol anti-freeze to cooling system. A
solution of 6 quarts ethylene glycol and 5-l/2
quarts of water will afford protection to -35F. If
a n t i - f r e e z e is not available, drain radiator and
cylinder block when ambient temperature is
expected to drop below 32F. Never add water to
Do not operate machine for prolonged
the cooling system without subsequently checking
periods in an unventilated area. All gasoline
the anti-freeze solution for adequate strength and
engines
produce
poisonous
adding anti-freeze if necessary.
carbon
monoxide gas which is extremely toxic if
allowed to accumulate in a closed area.
3-43. ELECTRICAL SYSTEM.
p. Be sure the brakes are in proper working
a. Test the specific gravity of the electrolyte in
c o n d i t i o n . Be sure all mechanical and electrical
the battery, using a hydrometer. Specific gravity
c o m p o n e n t s are in good working order prior to
r e a d i n g should be between 1.286 and 1.375 at
each shift of operation.
80F.
3-34. OPERATION UNDER UNUSUAL
b . Electrolyte
level
of
battery
must
be
maintained at l/2 inch above plates. Do not add
CONDITIONS.
water to a battery which has been exposed to cold
3-35. EXTREME HEAT.
temperature except when engine is to be operated
immediately.
3-36. COOLING SYSTEM.
c. Remove battery and store it in a warm place
a. Make sure fan belts are properly adjusted.
when shelter for truck is not available. The
efficiency of the battery decreases at lower
b . Check coolant level frequently, and be sure
temperatures, and a completely discharged battery
radiator cap is secure.
will freeze at 20F.
d . Be sure that wires and cables are in good
c . Keep exterior of radiator clean and free of
condition and that all connections are clean, dry
f o r e i g n matter which might affect circulation of
air.
and secure.
d. Flush and clean cooling system frequently.
e. Clean spark plugs and check gaps.
3-37. BATTERY. Check
f. Be sure terminal sockets and spark plug
electrolyte
level
frequently and maintain at proper levels.
terminals are clean.
3-38. LUBRICATION. Observe instructions on
Follow
3-44.
lubrication
LUBRICATION.
Lubrication Chart, figure 41.
instructions contained in Lubrication chart, figure
to expel moisture which may collect in vapor form
3-46. FUEL SYSTEM.
inside the tank.
a. Use prescribed winter grade of fuel.
3-40. EXTREME COLD.
3-9
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