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4.2
CHANGING THE ENGINE OIL AND
FILTER
4.2.1 ENGINE OIL RECOMMENDATIONS
Use oil of API Service Class SG, SH or SJ. The
recommended
oil
SAE 15W-40.
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.
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
grade
for
the
engine
NOTE:
Section 4 — Maintenance
Guardian Liquid-cooled 40 kW Generator
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).
is
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.
4.3
CHANGING 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
See the "Service Schedule," Section 4.12, for recom-
mended air cleaner maintenance.
Air Cleaner
Generac
®
Power Systems, Inc. 15
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