Operation & Maintenance Manual
If you cannot accurately check the oil level through the oil level gauge,
rotate the oil level gauge to 180 degree, put it in the guide tube, and then
pick it out again to check.
2. If the oil indicator lamp on the apparatus is lighted or blinks, the oil pressure may be
insufficient. In this case, shutdown engine and check the oil level and replenish oil if
required. When replenishing engine oil, do not exceed the maximum on the oil level
gauge . If the oil level is normal, check other related parts such as the oil pressure
sensor, oil pump, or oil line.
The oil pressure may increase with high rpm and decrease with low
rpm. In addition, the pressure of cold oil may be higher at a specif c rpm
than of warm oil. This phenomenon may even occur when the engine
operates properly.
3. Check the coolant gauge on the apparatus to ensure the coolant is circulating
properly. If the coolant level in the supplementary tank is too low, the coolant gauge
may be inaccurate.
4. Replace engine oil and oil filter after the break-in period.
If engine oil and oil f lter need to be replaced, use only genuine engine
oil and parts recommended by Doosan.
Operation after Break-in
Slowly preheat the engine when starting up during cold weather or in areas with cold climate.
Do not rapidly raise the rpm while the engine has not been properly preheated. The engine
consumes additional oil until its piston rings are positioned properly and operates successfully.
Please check the engine oil level frequently for the initial 50 hours of the break-in period.
Inspection after Starting the Engine
Check the pressure of the engine lubrication system by using the engine oil pressure gauge
mounted on the apparatus while the engine is in operation. If pressure decreases on oil
pressure gauge, immediately shut down the engine. In addition, make sure that the recharge
alarm indicator lamp of the alternator is off while the engine is operating.
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