Doosan 9/270 Operation And Maintenance Manual page 52

ENGINE OPERATION
Engine Exhaust Gas Caution (Carbon Monoxide)
CAUTION
Do not breathe exhaust gas because it contains carbon monoxide,
which by itself has no color or odor. Carbon monoxide is a dangerous
gas. It can cause unconsciousness and can be lethal.
Do not run the engine in confined areas (such as garages or next to a
building). Keep the exhaust tailpipe area clear of snow and other
material to help reduce the buildup of exhaust gases under the
equipment. This is particularly important when parked in blizzard
conditions.
CHECK BEFORE OPERATION
CAUTION: For safety reasons, conduct the inspection with the engine
stopped.
Engine Oil Level.
Place the engine or the machine on a level surface.
Remove the dipstick, wipe it with a cloth. Insert it fully and take it out
gently again.
Check the oil level against the marks on the dipstick. The oil level must
be between the 'H' level mark and the 'L' level mark as illustrated.
Fig. 6
Also check the sample oil on the dipstick for contamination and
viscosity.
Take care not to add too much engine oil
Oil can be poured either through the oil filler at the front of the cylinder
head cover or through the oil filler on the right side of the timing gear
case.
A certain period of time is required before the engine oil completely
flows down from the oil filler to the crankcase. Wait at least ten minutes
before checking the oil level.
NOTE: Take care to avoid engine oil being splashed on the fan drive
belt because it causes belt slippage or slackness.
CAUTION: When adding oil, take care not to spill it. If you spill oil on
the engine or equipment, wipe it properly, to prevent the risk of fire and
personal injury and/or equipment damage.
Fan and Belt Check
The engine is fitted with an automatic belt tensioner
OPERATING INSTRUCTIONS
Check the fan belt for tension and abnormalities.
A loose belt will cause belt slippage which may result in a damaged
belt, abnormal noise, poor battery charging and engine overheating.
Fig. 7
Use of Genuine Doosan Fan Belt.
Always use Genuine Doosan fan belts as they provide high driving
ability and long operating durability. Use of non-Doosan fan belts could
result in premature belt wear or belt elongation leading to engine
overheating or excessive belt noise.
Coolant Level Check
Check and ensure that the level is correct.
CAUTION: When removing the radiator filler cap, while the engine is
still hot, cover the cap with cloth, then turn it slowly to gradually release
the internal steam pressure. this will prevent anyone from being
scalded by hot steam spurting out from the filler neck.
Add coolant mixed to the correct ratio: 50/50 ethylene glycol/water.
Radiator Cap Condition
After the replenishment of the coolant, install the radiator filler cap.
Make sure the cap is securely installed.
Crankcase Breather
Check and clean the breather tube daily during cold weather.
Battery Cable Connection
Check the battery cable connections for looseness or corrosion. A
loosened cable connection will result in hard engine starting or
insufficient battery charge. The battery cables must be tightened
securely. Never reverse "+" and "-" terminals when reconnecting
cables after disconnection. Even a short period of reverse connection
will damage the electrical parts.
9/270, 9/300, 12/235, 17/235, 21/215, 9/270HA, 9/300HA, 10/300HA, 12/235HA, 17/235HA, 21/215HA
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