Onan 200 DFP - Page 18

Table 4 shows the oil viscosity grades that are recom¬
mended for various ambient temperatures. Use only the
viscosity grades shown in the table. The engine manu¬
facturer does not recommend the use of a single grade
oil.
TABLE 4
AMBIENT TEMPERATURE
SAE VISCOSITY GRADE
-13°F (-25°C) and below
See following section
-13 0 F to 95°F (-25°C to 35°C)
10W-30
14°F (-10°C) and above
15W-40
32°F (0°C) and above
20W-40
When selecting the oil viscosity, pick the grade that is
right for the lowest temperature expected. Oil that is too
thick may result in a lack of lubrication when the engine
is started. Use a lower grade of oil as the ambient
temperature reaches the lower end of the scale.
Oil Viscosity for Extreme Cold
The engine manufacturer recommends using a syn¬
thetic lubricating oil when the ambient temperature is
consistently below -13 ° F (~25°C) and there is no provi¬
sion to keep the engine warm. Use an SAE5W grade
synthetic oil provided it meets the following require¬
ments:
® API class CC/CD
• Sulphated ash content does not exceed 1.85 percent.
• Pour point is 9°F (5°C) below the lowest expected
temperature (minimum).
• Viscosity is 10,000 mPa«s (maximum) at -31 °F
(-35°C) and 4.1 mm 2 / s (minimum) at 212°F (100°C).
Do not use a petroleum base 5W grade oil for extreme
cold since it usually will not perform satisfactorily.
Engine Oil Level
Check the engine oil level during engine shutdown
periods at the intervals specified in the Maintenance
Table. The oil dipstick and oil filter are located on the
same side of the engine (see Figure 5). The dipstick is
stamped with high and low marks to indicate the level of
oil in the crankcase. For accurate readings, shut off the
engine and wait approximately 15 minutes before
checking the oil level. This allows oil in the upper por¬
tion of the engine to drain back into the crankcase.
Figure 6 shows the oil fill cap.
DIPSTICK
FILTER
OIL FILTER DRAIN PLUG
FIGURE 5. OIL FILTER AND DIPSTICK LOCATION
ik CAUTION
Do not operate the engine with the oil
level below the low mark or above the
high mark . Overfilling can cause foaming or aeration of
the oil while operation below the low mark may cause
loss of oil pressure .
AVA/ARMiKir 1 Crankcase pressure can blow out hot
jAWAniNIIMU j 0# y anc f cause serious burns . Do NOT
check oil while the generator set is operating.
Keep the oil level as near as possible to the high mark on
the dipstick. Remove the oil fill cap and add oil of the
same API and brand when necessary.
FIGURE 6. OIL FILL CAP
Oil and Filter Change
Change the oil and filter at the intervals recommended
in the maintenance table. Use oil that meets the engine
manufacturer’s API Classification and viscosity require¬
ments.
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