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8.
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. Carefully observe the following instructions for installing the engine.
8-1
INSTALLING
When mounting the engine, carefully examine its position, the method of connecting it to a load (machine), the foundation,
and the method of supporting the engine.
8-2
VENTILATION
Fresh air is necessary for cooling the engine and burning the fuel.
In cases 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 impossi-
ble 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 the hot air used
for
engine cooling, and temperature rise of the load (machine).
Take steps as necessary to keep the engine room temperature below
60°C
even in the hottest period of the year.
8-3
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 in
crease in proportion to exhaust pipe length.
Exhaust pipe:
Less
than
3
m long, pipe inside diameter
30
mm,
Less
than
5
m long, pipe inside diameter
38
mm.
8-4
FUEL SYSTEM
If the fuel tank is removed from the engine when mounting the engine with a machine, set the fuel tank
50
-
500
mm
above the fuel injection pump. If the tank is set too low, the fuel
will
not be supplied.
When piping be careful of heat conduction, pipe size, bends, and leaks from the joints and make the fuel pipe as short as
possible
to
prevent air and vapor from being trapped.
8-5
POWER
TRANSMISSION
to
DRIVE MACHINES
1.
Belt Drive
Take the following notes into consideration.
1)
V-belts are preferable to flat belts.
2)
The driving shaft of the engine must be parallel to the driven shaft of the load.
3)
.The driving pulley of the engine must be in line with the driven pulley
of
the load.
4)
Install the engme pulley as close to the engine as possible.
5)
If possible, span the belt horizontally.
6)
Disengage the load when starting the engine.
If
no clutch is used, use a belt tension pulley or the llke.
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,
-
40
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