Doosan 10/215HA, Operation & Maintenance Manual

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ENGINE INSTRUCTION MANUAL 25
9/235HA, 10/215HA
• If no steam or engine coolant can be seen or heard, open the
canopy or door. If the engine coolant is boiling, wait until it stops
before proceeding. The engine coolant level should be between the
“MAX COLD” and “MIN” marks on the reserve tank.
• Make sure the fan belt is not broken, or off the pulley, and that the
fan turns when the engine is started. If the engine coolant level in
the reserve tank is low, look for leaks at the radiator hoses and
connections, radiator, and water pump. If you find major leaks, do
not run the engine until these problems have been corrected. If you
do not find a leak or other problem, WAIT UNTIL THE ENGINE HAS
COOLED DOWN then carefully add engine coolant to the reserve
tank.
(Engine coolant is a mixture of ethylene glycol antifreeze and water.
See “Engine Care in cold season” for the proper antifreeze and
mixture.)
If the engine coolant level in the reserve tank is at the correct level but
there is still an indication of an overheat condition and no cause was
found, please consult your local Doosan branch or dealer.
Overcooling
Operating the engine at low coolant temperature will not only increase
the oil and fuel consumption but also will lead to premature parts wear
which may result in engine failure. Ensure that the engine reaches
normal operating temperature 75 to 85°C (167 to 185°F) within ten
minutes of starting.
(3) Hourmeter - This meter indicates the machine operation hours.
Make sure that the meter is always working during engine operation.
Periodical machine maintenance is scheduled on the operation hours
indicated on the hourmeter.
(4) Liquid and exhaust smoke leakage - Make regular checks for
lubricant, fuel, coolant and exhaust smoke leakage.
(5) Abnormal engine noise - In the event of any abnormal engine
noise, please consult your local Doosan branch or dealer.
(6) State of the exhaust smoke - Check for any abnormal exhaust
smoke colour.
Engine stopping
• Close service valves.
• Before stopping the engine, cool down the engine by operating it at
reduced load about three minutes. In this period, check the engine
noise and the engine oil pressure (where a gage is fitted) for
abnormalities.
Long term storage
If the equipment is to be out of operation for an extended period, it
should be started at least once per week and run on load for about
15 minutes after it has reached normal operating temperature.
CAUTION: To avoid being burned, do not spill antifreeze or
engine coolant on the exhaust system or hot engine parts.
Under some conditions the ethylene glycol in engine coolant is
combustible.