MMD Equipment 40S-8B1 - Manual (Page 52)

5. Periodic Inspection/Maintenance
5-14
5.6 Periodical Load Operation to be Performed
[Check and inspection upon each occurrence of the following phenomena]
 Operating a generator for extended period with light load, less than 30 % or no load applied can
cause carbonization in the exhaust pipe, exhaust muffler and engine and also unburned fuel can
sometimes leak from the connection of exhaust pipe and from the outlet of the exhaust muffler. If
it continues at the same conditions, the leaked unburned fuel can cause a fire.
 Further, accumulation and clogging of carbon in the exhaust muffler can degrade engine
performance and overheating to the engine, resulting in a serious accident. In case that such
phenomena occur, it should be continuously operated with load applied till the exhaust gas color
becomes generally gray and also till carbon accumulated in exhaust system can be eliminated,
being burnt.
(For load current, refer to the following table as an aim.)

Increase the load factor, step by step, paying attention to the exhaust conditions. Also watch the
surroundings because sometimes sparks of fire can come out from the exhaust pipe and the like.
Type SDG40S-8B1 SDG45S-8B2
Frequency Hz 60
Rated voltage V 240 480 240 480
Load current A 74 37 88 44