G80XW/XF, G115XW/XF, G150XW/XF, G200XW/XF - 50HZ
OPERATION & MAINTENANCE MANUAL
53
G100XW/XF, G135 XW/XF, G170XW/XF, G225XW/XF - 60Hz
STOPPING THE ENGINE
Cut off the main circuit breaker of the generator control
panel but do not stop the engine immediately. Keep
running the engine at idle speed for approximately 5
minutes before stopping the engine.
BREAK-IN PERIOD OF THE ENGINE
GENERAL INFORMATION
Doosan engines are subjected to a final approval test to
ensure the provision of high quality engines before being
shipped. However, engines are not operated for a long
period of time in this test. Therefore, new engines require
a break-in period during the initial 50 hours after delivery.
By properly breaking-in an engine, the highest levels of
engine performance can be maintained long-term.
BREAK-IN PERIOD OF A NEW ENGINE
If the engine's bearings are not properly broken in, they
may be easily damaged and the lifetime of the engine
may be shortened by overloading or high speeds. In
order to prevent this, follow the guidelines below for the
initial 50 hours after delivery of new engine.
1. Fully warm up the engine until the engine temperature
reaches the normal operation condition, before
starting normal operation of the engine.
2. Do not overload the engine or operate it at too high
RPM.
3. Do not operate the engine with high speed at idle.
4. Do not rapidly start up or stop the engine.
5. Operate the engine with less than 70% of the engine
load.
6. Inspection, check, and repair of engines should be
managed by officially-certified technicians at certified
service centers in compliance with corresponding
rules.
CHECK POINTS
Check the following during the break-in period of a new
engine.
1. Periodically check if the engine oil level is between
the minimum and maximum limit of the oil level
gauge.
CAUTION
If the oil level cannot be accurately checked through
the oil level gauge, rotate the oil level gauge to 180
degrees, insert in the guide tube, and then withdraw
to check.
2. If the oil indicator lamp on the apparatus is turned on
or blinks, the oil pressure may be insufficient. In this
case, 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.
CAUTION
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 specific rpm than that of
warm oil. This condition may occur when the engine
operates properly.
3. Check the coolant level to check if the coolant
circulates properly. If there is insufficient coolant in
the radiator, the coolant level indicated may not be
accurate.
4. Exchange engine oil and oil filter after the break-in
period.
CAUTION
If engine oil and oil filter need to be replaced, use
only genuine engine oil and parts recommended by
Doosan.
COLD START OPERATION
Slowly warm up the engine in case of starting up in cold
weather or in areas with cold climate. Do not rapidly raise
the rpm or load before the engine has been warmed up.
The engine may consume oil until its piston ring is in
position. 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 stop the
engine. In addition, make sure that the recharge alarm
indicator lamp of the alternator is turned off while the
engine is operating.
1. Tightly connect the +/- terminals to prevent gaps
between them. The sheath of battery connection
cables should not be damaged or broken.
2. If the recharge alarm indicator lamp suddenly turns on
or blinks during engine operation and the engine
stops, fix the fault of the electric apparatus.
