11.
INSTALLATION
Engine life, ease of maintenance and inspection, frequency of checks and repairs, and operating cost all
depend
on
the way
in
which the engine is installed. Review the following instructions carefully for
,”
installing the engine.
11 -1 INSTALLING
When mounting the engine, carefully examine its position, the method of connecting
it
to a machine, the
foundation, and the mehtod of supporting the engine.
When determining
its
mounting position,
in
particular, make sure that gasoline and oil can easily be
supplied and checked, the spark
plug
can easily be checked, the air cleaner can easily be serviced, and
that the oil can easily
be
discharged.
11
-2
VENTILATION
Fresh air is necessary
for
cooling the engine and burning the fuel.
In
the casc the engine
is
operated under a hood
or
in
a
small
room,
temperature rise
in
the engine room
can cause vapor lock, oil deterioration, increased oil consumption,
loss
of power, piston seizure, shorter
enginc
life,
etc., making
it
impossible
to
operate the engine properly.
It
is
necessary, therefore,
to
provide
a
duct
or
baffle
to
guide cooling
air
to
the engine to prevent recirculation
of
he
hot
air used for engine
cooling, and temperature rise
of
the machine.
Keep
the engine
room
temperature below
5O0C
even
in
the hottest
period
of
the year.
11
-3
EXHAUST
GAS
DISCHARGE
Exhaust gas
is
noxious. When operating the engine indoors, be sure to discharge the exhaust
gas
outdoors.
If
a
long
exhaust pipe
is
used
in
such
a
case, the internal resistance increases causing loss
of
engine power. Thus pipe inside diameter must be increased
in
proportion to exhaust pipe length.
Exhaust pipe: Less than 3m long, pipe inside diameter 30mm,
Less than
5m
long,
pipe inside diameter
33mm.
11-4 POWER TRANSMISSION
TO
DRIVEN MACHINES
11
-4-1
BELT
DRIVE
Takc
the following notes
into
consideration.
*
V-belts
are preferable
to
flat belts.
*
The driving shaft
of
the enginc must
be
parallel
to
the driven shaft
of
the machine.
*
‘I’hc driving pulley of thc engine
must
be
in
line with the driven pulley
of
the machine.
*
Install thc engine pulley
as
close
to
the engine
as
possible.
*
If
possiblc, span the belt horizontally.
*
Disengage
the
load when starting the engine.
If
no
clutch is
uscd,
use
a
belt
tension pulley
or
the like.
11-4-2
FLEXIBLE COUPLING
When using
a
flcxible coupling,
runout
and misalignment between the driven shaft and engine shaft must
he
minimized.
Runout
and
misalignment tolerance are specified by the coupling manufacturer.
n
-
56
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