During operation, coolant level must be between the low and high marks of the tank level. If there is no coolant in emergencies, slowly add coolant with temperature not too lower from the coolant filler, until the coolant becomes over-flown. Start engine and continue to add coolant with engine running at 1000 r/min, till it is full and the level becomes stable. Finally cover the filler cap. 4.4.5 Monitoring the exhaust gas Healthy engine operation and performance can be properly pointed out by the engine exhaust. Poor mechanical adjustments, dirty air cleaner, using poor grade fuel or over-fueling may cause a smoky exhaust. Action should be taken immediately to treat it.
If any serious color change is noticed, stop the engine and carry out the inspection procedure. Refer table 4.3 for main parameters of analyzing the exhaust gas.
EXHAUST GAS QUALITY MONITORING SR.NO COLOR REASON 1 Clear Healthy combustion system 2 Grey Poor combustion quality (faulty injector or injection pump, weak compression, etc.) 3 Dark grey Poor combustion quality (one or more system failed - choked air filter, weak turbocharger, chocked intercooler, failed injector or fuel injection pump etc.) 4 Blue Engine oil burning in combusting chamber 5 White Water ingresses in fuel/combustion system Table 4.3 4.4.6 Engine shutdown Engine should run on idle speed for 3~4 minutes before shutting down.
Running on idle speed will ensure uniform heat dissipation and enough cooling and to lubrication to high temperature areas like turbocharger & combustion chamber etc. However excessive idling should be avoided. Caution for operation After starting the engine, let it run at idle speed for a few minutes (2-3 minutes), then gradually increase the speed to 1000~1200r/min, and apply a partial load. Apply full load only when the fresh water outlet temperature is higher than 60°C, and oil temperature is higher than 50°C. Increase the load and speed gradually. Avoid sudden application or removal of load. 23 23