Kohler 12RES Lubrication System, Low Oil Pressure Shutdown, Oil Check, Engine Oil Recommendation

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.

3.3.1Low 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.

3.3.2Oil Check

The generator set is shipped with oil. Before operating a new generator set, check the engine oil in the

crankcase. See Section 1.5, Generator Set Components. 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.

3.3.3Engine 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 3-1.

10W-30

5W-20, 5W-30

°F --20	0		20 32 40	60	80	100
°C --30 --20		--10	0	10 20	30	40
Temperature		Range Expected Before Next Oil Change

Figure 3-1 Engine Oil Selection

3.3.4Oil 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 oil filter by rotating it counterclockwise with an oil filter wrench.

TP-6331 5/04 Section 3 Scheduled Maintenance 11