Generac Power Systems 004373-6, 004626-5 owner manual Changing the Engine OIL and Filter

Section 4 — Maintenance

Guardian Liquid-cooled 40 kW Generator

4.2CHANGING THE ENGINE OIL AND FILTER

‹4.2.1 ENGINE OIL RECOMMENDATIONS

Use oil of API Service Class SG, SH or SJ. The recommended oil grade for the engine is SAE 15W-40.

NOTE:

5.Apply a light coating of clean engine oil to the seal of new oil filter. Install the filter and tighten by hand only. DO NOT OVERTIGHTEN.

6.Remove the oil fill cap (Figure 4.1). Add the recom- mended oil (see Section 4.2.1). DO NOT FILL ABOVE THE DIPSTICK “FULL” MARK. Crankcase oil capacity is 4.5 U.S. quarts (4.25 L).

The unit is supplied with “break-in” oil. See the “Service Schedule,” Section 4.12, for the first required oil change.

Any attempt to crank or start the engine before

!it has been properly serviced with the recom- mended oil may result in an engine failure.

After refilling the crankcase with oil, always

!check the oil level on the dipstick. Never operate the engine with the oil level below the “Add” mark on the dipstick. Doing this could damage the engine.

7.Start the engine and check for oil leaks.

8.Check the oil level after checking for leaks to ensure that the oil is filled to the proper level.

‹4.2.2 OIL AND FILTER CHANGE PROCEDURE

To change the oil and filter, proceed as follows:

Refer to the “Service Schedule,” (Section 4.12) for engine oil and filter change frequencies.

Drain the oil while the engine is still warm from run- ning. This means, warm up the engine, shut it down and drain it immediately as follows:

1.Remove the oil drain hose from its retaining clip, located on the generator base frame.

2.Loosen and remove the oil drain hose cap, located on the base frame end of the hose. Drain the oil completely into a suitable container.

3.When all of the oil has drained, install and tighten the oil drain hose cap.

4.Turn the oil filter (Generac part number 0A37970001, Figure 4.2) counterclockwise and remove it. Properly dispose of the old filter.

Figure 4.2 – Oil Filter

4.3CHANGING THE ENGINE AIR

CLEANER

To replace the engine air cleaner, (Generac part num- ber 0A4637), remove the air cleaner cover and replace the air filter making sure it is positioned properly before reattaching the cover. (See Figure 4.3).

Figure 4.3 – Engine Air Cleaner

Air Cleaner

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See the “Service Schedule,” Section 4.12, for recom- mended air cleaner maintenance.

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