The Pensacola journal. (Pensacola, Fla.) 1898-1985, 1919-07-03
HOT WEATHER
HINTS FOR
CARE TRUCKS
BY ALFRED r. MASURY.

First of all, il is necessary to I'M
derstand the cooling system. Do not
expect the truck to labor in low gear
up long grades or through deep sand,
perhaps with a trailer, and still keep
cool If carbon deposit is permitted to
accumulate in the cylinders, IL insult
ficient water is not put in the radia-
tor, If the oil level is low or the oil
is of the wrong kind.
At the beginning of the season IL is
ordinarily necessary to change the
carburetor adjustment, that in sum-
mer being a trifle leaner than that for
winter. Overheating is sure to result
il the carburetor is improperly adj
justed.
Timing has an important bearing on
cooling In hot climates where tenn
peratures are excessive for a consid
cradle part of the year. the engine
may be made to run cooler. but at a
slight sacrifice of power, by setting
the camshaft one tooth ahead
(earlier) on the timing gears, so that
the exhaust valves open earlier. A
weak spark has the same effect as
late spark timing, and overheating
will result.
Difficult grades can be made with
greater speed and less fuel in inter-
mediate than if the engine is per-
mitted to labor in high to the point of
stalling. Contrary to popular suppo-
sition the engine will cool better If it
is not obliged to labor excessively.
Keep the exhaust clear of obstruc-
tions and do not allow mud to cake
on the outside of the muffler or clog
the outlet.
The radiator must De filled as full
as possible. Do not allow the over
flow pipe to become clogged. or flat
tened by a blow or kink or slip down
in the radiator.
Usa only the best quality OF rub
Der hose for water connections.
The inside of cheap tubing is apt to
dissolve and the rubber particles clog
up the system. Go over hose connec-
tions in the spring because some
anti-freeze solutions have a deleter-
ious effect upon the rubber. Also
they have scum inside the radia-
tor which will not dissipate the heat.
1t must be cleaned out.
In filling the radiator only clean
water should be used. Strain the
water through a cloth where none but
dirty water is available. Above all,
do not use buckets in which oil has
been kept.
Keep the fan clean and well creased
so that it will turn freely.
Not all of the cooling of the engine
is effected by water; but lubricating
oil plays an important part, it
cools the bearings. Keep the crank
case clean; it cools the oil. 1t has
been found that gasoline washes the
lubricant from the cylinder walls and
mixture of gasoline and oil runs
into the crank-case where in time
it destroys the lubricating qualities
of the oil. For this reason the oil
in the crank-lase should be drained
and replaced with new oil every 1900
miles If this is not done the oil will
be unable to properly lubricate the
rubbing surfaces and heating will re-
suit.
The average working temperature
of oil in summer is higher than in the
winter, and so oil of the same body
will be thinner. Some times ii is adj
visable to use a grade heavier oil in
summer. In excessively hot spells an
heavy grade of oil may be
required to maintain the oil at the
proper consistency in operation. When
a heavier oil is used care should be
taken not TO work the engine too hard
before it is warmed up. Buy oil only
from reliable refiners