Kohler 8.5RES, 12RES Spark Plugs, 3.5Air Cleaner Element and Precleaner, 3.5.1Precleaner Service

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.

d.Reconnect the generator set engine starting battery, negative (--) lead last.

e.Reconnect the power to the battery charger.

f.Start and run the generator set for a minute to allow the oil pressure to reach the operating range.

g.Stop the generator set, wait 1 minute, and then recheck the oil level. Add oil to bring the level up to the F mark on the dipstick.

4.Check for leaks.

a.Check for oil leaks.

b.Fix leaks and recheck the oil level.

c.Reinstall the housing side panel.

3.4 Spark Plugs

Reset the spark plug gap or replace the plugs with new plugs as necessary.

1.Clean the area around the base of the spark plug to keep dirt and debris out of the engine.

2.Remove the spark plug and check its condition. Replace the spark plug if it is worn or if its reuse is questionable.

3.Check the spark plug gap using a wire feeler gauge. Adjust the gap to 0.76 mm (0.030 in.) by

carefully bending the ground electrode. See Figure 3-2 and Figure 3-3.

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Figure 3-2 Checking the Spark Plug Gap

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Figure 3-3 Adjusting the Spark Plug Gap

3.5Air Cleaner Element and Precleaner

The engine has a replaceable high-density paper air cleaner element with an oiled foam precleaner. See Figure 3-4.

Check for a buildup of dirt and debris around the air cleaner system. Keep this area clean.

Note: Operating the engine with loose or damaged air cleaner components could allow unfiltered air into the engine causing premature wear and failure.

3.5.1Precleaner Service

Use the following procedure to wash and reoil the precleaner as indicated in the service schedule. Wash and reoil the precleaner more often under extremely dusty or dirty conditions.

1.Place the generator set master switch in the OFF/RESET position.

2.Disconnect the power to the battery charger.

3.Disconnect the battery, negative (--) lead first.

4.Loosen the cover retaining knob and remove the cover. Remove the precleaner from the paper element. Wash the precleaner in warm water with detergent. Rinse the precleaner thoroughly until all

12 Section 3 Scheduled Maintenance TP-6331 5/04