12.
INSTALLATION
Engine life, ease
of
maintenance and inspection, frequency of checks and repairs,
and
operating
cost
all
de-
pend on the way
in
which the engine is installed. Carefully observe the following instructions for installing
,"-
the engine.
12-1 INSTALLING
When mounting the engine, carefully examine its position, the method of connecting it to a load (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.
12-2 VENT1 LATION
Fresh air is necessary for cooling the engine and burning the fuel.
In case where 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
engine 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 load (machine).
Take steps as necessary
to
keep the engine room temperature below 50°C even in the hottest period of the
year.
12-3 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 increase in proportion to exhaust pipe length.
Exhaust pipe: Less than
3
m long, pipe inside diameter
25
mm,
Less than
5
m long, pipe inside diameter
30
mm.
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12-4
POWER
TRANSMISSION
to
DRIVEN MACHINES
12-4-1
BELT
DRIVE
Take the following notes into consideration.
*
V-belts are preferable to flat belts.
*
The driving shaft of the engine must be parallel to the driven shaft
of
the load.
*
The driving pulley
of
the engine must be in line with the driven pulley of the load.
*
Install the engine pulley
as
close
to
the engine
as
possible.
*
If
possible, span the belt horizontally.
*
Disengage the
load
when starting the engine.
If
no
clutch
is
used, use
a
belt tension pulley
or
the like.
12-4-2
FLEXIBLE
COUPLING
When using a flexible coupling, runout and misalignment between the driven shaft and engine shaft must be
minimized. Runout and misalignment tolerance are specified by the coupling manufacturer.
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