-
13.
INSTALLATfON
-
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.
13-1 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 discharges.
13-2 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.
L
13-3 EXHAUST GAS DISCHARGE
I
Exhaust gas in 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.
13-4 POWER TRANSMISSION
to
DRIVEN
MACHINES
13-4-
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 thelike.
13-4-2
FLEXIBLE COUPLING
B
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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