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52
PERIODICAL INSPECTION AND MAINTENANCE
LUBRICATING SYSTEM.
Servicing of the engine oil and oil filter element will affect the engine
performance as well as the engine life. Change the engine oil and the
oil filter in accordance with the recommended service intervals.
Engine Oil and Oil Filter Element Change.
Engine Oil Change and Oil Filter Element Change must be made
simultaneously according to the following change schedule.
Change intervals: Refer to maintenance schedule section.
Engine Oil draining -
CAUTION: To help avoid the risk of being burned, do not drain oil
while the engine is still hot.
Wipe clean around the oil filler cap taking care so that no foreign
articles enter. Remove the filler cap.
It is advisable that draining be done while the engine is warm to
minimize the draining time.
Remove the oil pan drain plug and drain the engine oil completely.
NOTICE: Use a receptacle to catch the drained oil so that the engine
and equipment will not be contaminated.
Fig. 9
Remove drain plug arrowed to drain the engine oil completely.
Oil filter element removal
Fig. 10
A Cartridge
9/270, 9/300, 12/235, 17/235, 21/215, 9/270HA, 9/300HA, 10/300HA, 12/235HA, 17/235HA, 21/215HA
Oil filter element installation -
Lightly apply engine oil to the O-ring.
Fig. 11
Screw in the new cartridge hand tight as the O-ring comes in contact
with the engine block. Tighten a further 3/4 to 11/4 turns. DO NOT
overtighten.
Engine oil refilling.
Reinstall the drain plug.
Fill with new engine oil via the most convenient oil filler port.
Wait at least ten minutes until the oil drains down to the oil pan. Then
check the oil level with the dipstick.
Check after Oil and Filter Changes.
Oil leakage check:
Run the unit for five to ten minutes, then visually check for oil leakage.
Oil level recheck:
Stop the engine for at least ten minutes.
Use the dipstick to recheck the oil level. If necessary replenish with
engine oil to the specified level
NOTE: When the engine is started, the oil level will slightly drop from
the initial level as the oil fills the entire oil circuit.
Engine Oil Additives.
Engine oils contain a variety of additives. Your engine should not need
any extra additives if you use the recommended oil quality and change
intervals.
Used Oil Disposal - Do not dispose of used engine oil (or any other
oil) in a careless manner such as pouring it on the ground, into sewers,
or into streams or bodies of water. Instead, recycle it by taking it to a
used oil collection facility which may be found in your community. If you
have a problem disposing of your used oil, it is suggested that you
contact your local Doosan branch or dealer. This also applies to diesel
fuel which is contaminated with water.
Used Engine Oil.
CAUTION: Used engine oil contains harmful contaminants that have
caused skin cancer in laboratory animals. Avoid prolonged skin con-
tact. Clean skin and nails thoroughly using soap and water -not min-
eral oil, fuels, or solvents. Launder or discard clothing, shoes, or rags
containing used engine oil.
Discard used engine oil and other oils properly.
COOLING SYSTEM
Coolant Change.
The coolant must be changed at intervals of 1000 hours or twelve
months, whichever come first.
If the coolant becomes sludged up it will lead to engine overheating or
coolant blow-off from the radiator.
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