INTRODUCTION CAUTION Other cautions Modification of engine prohibited Unauthorized modification of the engine will void the manufacturer’s warranty. Modification of the engine may not only cause engine damage but also produce personal injuries. Warming-up operation After starting the engine, run the engine at low idling speeds for 5 to 10 minutes for warming-up. Start the work after this operation is completed. Warm-up operation circulates the lubricant through the engine. Therefore, individual engine parts are well lu- bricated before they are subjected to heavy loads. This is very important for longer service life, high-perfor- mance and economical operation.
Do not conduct warm-up operation for a longer time than necessary. Prolonged warm-up operation causes carbon build-up in the cylinders that leads to incom- plete combustion. Never break the seals To ensure proper engine operation, the fuel control link is provided with seals that protect the fuel injection vol- ume and rotation speed settings against tampering. If these seals are broken and the settings are changed, proper operation of the engine will no longer be guar- anteed, and the following problems will be expected to occur.
Rapid wear of moving and rotating parts Engine troubles such as damage and seizure of engine parts Increased consumption of fuel and lubricating oil Deterioration of engine performance due to poorly balanced fuel injection volume and governor opera- tion Avoid engine operations in a overload con- dition If the engine is considered to be in an overloaded con- dition which is identified by too much black smoke, etc., immediately reduce the load on the engine such that the correct output and load conditions may be achieved. Overloading the engine causes not only high fuel con- sumption but also excessive carbon deposits inside the engine.
Excessive carbon deposits can cause various engine problems and shorten the service life of the en- gine remarkably. Pre-operational check and periodic inspec- tion/maintenance Be sure to perform the pre-operational checks and pe- riodic inspection/maintenance as described in this manual. Neglecting the pre-operational check or periodic in- spection/maintenance can arouse various engine trou- bles such as damage to parts, eventually leading to serious accidents. Cooling operation before stopping engine Always conduct the cooling operation (low speed idling) for 5 to 6 minutes before stopping the engine.
Abruptly stopping the engine immediately after high- load operation can cause partial overheating and short- en the service life of the engine. During cooling operation, check the engine for abnor- malities. Break-in operation A new engine needs to be broken in for the first 50 hours of operation. During this period, do not subject the engine to heavy loads. Operating a new engine under high loads or severe conditions during the break-in period can shorten the service life of the engine. Protection of engine against water entry Do not allow rainwater, etc. to enter the engine through the air inlet or exhaust openings. Do not wash the engine while it is operating.
Cleaning fluid (water) can be sucked into the engine. Starting the engine with water inside the combustion chambers can cause the water hammer action which may result in internal engine damage and serious acci- dents. VIII