2. Operation and Maintenance
11
Starting and Stopping the Engine
Preparing to Start
Inspect the following before starting the engine for the first time
after purchasing it.
1. Check the fuel, coolant and oil levels before starting the
engine; add as necessary.
2. Check whether the engine oil level lies between the
upper and lower limit lines on the oil level gauge. The
upper and lower limit lines on the oil level gauge indicate
the maximum and minimum engine oil levels.
3. When adding fuel, oil or coolant, take care not to allow
foreign matter to enter the engine; store them in a clean
place when not in use in order to prevent contamination.
Use only fuel, oil, coolant, etc. recommended by Hyundai
Doosan Infracore. Otherwise, severe engine faults may
occur.
When Starting the Engine
Follow the instructions below when starting the engine.
1. For cold starts, start the engine after preheating it suffi-
ciently with the glow plug.
2. If the engine is started abruptly, oil cannot reach the
turbocharger as well as the various parts of the engine;
this lack of lubrication can lead to abnormal wear or
seizure of the bearings. Hence, before starting the
engine, it is necessary to run it with the starter motor to
check for a rise in hydraulic pressure (until the needle on
the hydraulic pressure gauge installed in the machine
moves or the pressure indicator comes on).
3. Oil flow in pipes worsens after the engine has been
stopped for a prolonged period of time or in cold weather.
Hence, after changing the oil, replacing the oil filter
cartridge or parts of the lubrication system or leaving the
engine stopped for an extended period of time or in cold
weather, undo the oil pipe connection at the inlet of the
turbocharger and run the starter motor until oil flows out
of it. Once this step is complete, make sure to retighten
the pipe connection and start the engine.
Immediately after Starting the Engine
1. After starting the engine, do not increase the engine rpm
suddenly when the engine and turbocharger are not yet
rotating smoothly. The engine may be overloaded,
leading to seizure in parts not yet sufficiently lubricated
by oil. Hence, idle the engine after starting it to enable
enough oil to reach the turbocharger.
2. Oil, air and gas leakage reduces hydraulic pressure. Oil
leakage in particular may cause bearings to seize.
Hence, in the event of an oil, air or gas leak, check the
leaking part, locate the cause and resolve the issue.
During Operation
1. If the oil pressure is excessively low, it can lead to
abnormal wear or seizure of bearings; if it is excessively
high, it can cause oil leaks.
2. Continuing to run the engine with abnormal noise or
vibrations may cause severe damage to the engine.
Hence, in the event of abnormal noise or vibrations, lower
the engine rpm slowly; then, stop the engine and deter-
mine the cause.
When Stopping
Do not stop the engine abruptly after running it at a high rpm
for an extended period of time. If heat transferred from the
hot turbine blades reaches the bearings and causes oil to
burn, it may lead to seizure of the metal bearing and rotating
shaft. Hence, after operating the engine at a high rpm for a
prolonged period of time, idle the engine sufficiently before
stopping it.
Do not fill engine oil past the upper limit line on the oil
level gauge. Overfilling oil can damage the engine.
To Next Page
