Lubrication System; Low Oil Pressure Shutdown; Oil Level Check; Engine Oil Recommendation - Kohler 8.5RES Service

2.2 Lubrication System

See Section 2.1, Service Schedule, for oil change and
oil filter replacement intervals. See Figure 2-2 for the oil
drain, oil check, oil fill, and oil filter locations.
The engine has a positive pressure lubrication system
and low oil pressure shutdown.
1. Dip stick location
2. Oil fill
3. Oil drain hose
Figure 2-2 Lubrication System (typical)
2.2.1

Low Oil Pressure Shutdown

The low oil pressure shutdown feature protects the
engine against internal damage if the oil pressure drops
below preset limits because of oil pump failure or other
malfunction. It does not protect against damage caused
by operating with the oil level below the safe range—it is
not a low oil level shutdown.
2.2.2

Oil Level Check

Check the oil level regularly and add oil as needed to
protect against running out of oil. See Figure 2-2 for the
dipstick and oil fill locations. Do not check the oil level
when the generator set is running. Shut down the
generator set and wait several minutes before checking
the oil level.
TP-6196 10/09
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1 2
6 5 4 3
4. Oil drain valve
5. Oil cooler
6. Oil filter
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2.2.3

Engine Oil Recommendation

Use synthetic oil of API (American Petroleum Institute)
Service Class SG or higher. Synthetic oil causes fewer
deposits on the engine intake valves and pistons
because it oxidizes and thickens less than other oils.
See Figure 2-3 and Figure 2-4.
Model
8.5kW
12kW
Figure 2-3 Oil Capacity with Filter
5W-20, 5W-30
°C --30 --20
°F --20
Temperature Range Expected Before Next Oil
Change
ADV--7466
Figure 2-4 Engine Oil Selection
2.2.4

Oil Change Procedure

Whenever possible, drain the oil while it is still warm.
1. Drain the oil.
a. Place the generator set master switch in the
OFF position.
b. Disconnect the power to the battery charger.
c. Disconnect the generator set engine starting
battery, negative (--) lead first.
d. Remove the oil drain hose from its retaining
clip. See Figure 2-2. Remove the cap from the
oil drain hose and lower the hose into an oil
collection container.
e. Open the oil drain valve on the engine.
Remove the dipstick and oil fill cap.
f. Allow time for the engine oil to drain completely.
g. Close the oil drain valve.
h. Replace the cap on the oil drain hose. Replace
the oil drain hose in its retaining clip.
L (Qt.)
1.9 (2.0)
2.0 (2.1)
10W-30
--10
10
0 20
0 20 32 40 60 80
Section 2 Scheduled Maintenance
30
40
100
21