Lubrication System; Low Oil Pressure Shutdown; Oil Check; Engine Oil Recommendation - Kohler 8.5RES Operation And Installation

3.3 Lubrication System

See Section 3.2, Service Schedule, for oil change and
oil filter replacement intervals. See Section 1.5, Service
Views, for the oil drain, oil check, oil fill, and oil filter
locations.
For extended operation, check the oil level every 8
hours. Maintain the oil level at or near, not over, the full
mark on the dipstick.
3.3.1

Low Oil Pressure Shutdown

The low oil pressure shutdown feature protects the
engine against internal damage if the oil pressure drops
below 24.1 kPa ±13.8 kPa (3.5 psi ±1.5 psi) because of
oil pump failure or other malfunction. The shutdown
feature does not protect against damage caused by
operating with the oil level below the safe range; it is not
a low oil level shutdown. Check the oil level regularly,
and add oil as needed.
3.3.2

Oil Check

The generator set is shipped with oil. Before operating a
new generator set, check the engine oil in the
crankcase. See 1.5, Service Views. Verify that the oil
level is at the F mark on the dipstick. Add oil that has a
viscosity appropriate for the climate. See Section 3.3.3,

Engine Oil Recommendation.

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.
3.3.3 Engine Oil Recommendation
Use API (American Petroleum Institute) Service Class
SG, SH, or SJ synthetic oil. Synthetic oil oxidizes and
thickens less than other oils and leaves the engine
intake valves and pistons cleaner. Select the viscosity
based on the air temperature at the time of operation.
See Figure 3-2.
5W-20, 5W-30
°F
32
--20 0 20
°C
--30 --20 --10
Temperature Range Expected Before Next Oil Change
Figure 3-2 Engine Oil Selection
TP-6195 1/04
10W-30
60 80 100
40
0 10 20 30 40
3.3.4

Oil Change Procedure

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 housing side panel.
e. Remove the oil drain hose from its retaining
clip. Remove the cap from the oil drain hose
and lower the hose into an oil collection
container.
f. Open the oil drain valve on the engine.
g. Allow time for the engine oil to drain completely.
h. Close the oil drain valve.
i. Replace the cap on the oil drain hose. Replace
the oil drain hose in its retaining clip.
2. Replace the oil filter.
a. Remove the
counterclockwise with an oil filter wrench.
b. Clean the gasket sealing surface of the oil filter
adapter.
c. Apply a light coat of clean oil to the rubber seal
of the new oil filter.
d. Install the new oil filter following the instructions
provided with the filter.
Note: Dispose of all waste materials (engine
oil, fuel, filter, etc.) in an environmentally
safe manner.
3. Fill with oil.
a. Remove the oil fill cap and fill the engine to the F
mark on the dipstick. The engine oil capacity is
1.9 L (2.0 qt.). See Section 3.3.3, Engine Oil
Recommendation, for oil selection.
b. Reinstall the dipstick and the oil fill cap.
c. Check that the generator set master switch is in
the OFF position.
Section 3 Scheduled Maintenance
oil filter by rotating it
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