Weichai — Weichai WP12 Marine Diesel Engine Manual (EN)

In normal operation of the engine, it is allowed to operate continuously at described rated speed and power. However, the permissible over-speed is 103% of the rated speed and over-load is 110% of the rated power. Duration for the above permissible over-speed/load is 1 hour within every 12 hours. Do not check oil or coolant level while engine is running CAUTION OK OK Mixture of different grade or brands of engine oil is strictly prohibited. During operation, always pay attention to the parameter values displayed on the panel and observe the performance of various systems. Carefully check the diesel engine for water leakage, air leakage, oil or fuel leakage.

Stop engine if any leakage is found, and rectify the trouble. Engine economy balancing tips It is most economical to operate the engine at medium speed -ranging from 60% to 90% of rated speed. The engine power is increased with the increase of the speed. Rated power is obtained at rated speed. According to seasons, select the specified brand of fuel, oil and coolant in compliance with requirements. Carry out the inspection and maintenance according to schedule (see Section IV of this manual).

During operation, maintain engine parameter as per table 4.3 Any sudden rise in oil/coolant temperature which is not caused by increase in load is a possible system failure warning and should be investigated thoroughly at once CAUTION 24