Robin America EH72, Руководство по обслуживанию

Страница: 62 / 74

– 58 –
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 method 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 case 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 machine.
Keep the engine room temperature below 50°C 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 3 m long --- pipe inside diameter 30 mm.
Less than 5 m long --- pipe inside diameter 33 mm.
11-4 POWER TRANSMISSION TO DRIVEN MACHINES
11-4-1 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 machine.
* The driving pulley of the engine must be in line with the driven pulley of the machine.
* 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.
11-4-2 FLEXIBLE COUPLING
When using a flexible coupling, run out and misalignment between the driven shaft and engine shaft must be
minimized. Run out and misalignment tolerance are specified by the coupling manufacturer.