18 Generac
®
Power Systems, Inc.
Figure 4.4 – Oil Drain Hose and Filter
4.4
CHANGING THE OIL FILTER
Change the engine oil filter as follows:
1. With the oil drained, remove the old oil filter by
turning it counterclockwise.
2. Apply a light coating of clean engine oil to the gas-
ket of the new filter. See Section 1.5.1 (Page 6) for
recommended filter.
3. Screw the new filter on by hand until its gasket
lightly contacts the oil filter adapter. Then, tighten
the filter an additional 3/4 to one turn (Figure 4.4).
4. Refill with the proper recommended oil (see
Section 4.3.1, Page 17). See Section 1.5.2 (Page 6)
for oil capacities.
5. Start the engine and check for leaks.
4.5
CHANGING THE ENGINE
AIR CLEANER
4.5.1 7 KW, 12 KW AND 15 KW
GENERATORS
See Figures 1.1 and 1.2, (Page 5), for the location of
your air cleaner. Use the following procedure (Figure
4.6):
1. Turn the two screws counterclockwise to loosen.
2. Remove the cover and air filter.
3. Wipe away dust or debris from inside of the air
box and around edges.
4. Install the new air cleaner into the air box.
5. Install the cover. Turn the two cover screws clock-
wise to tighten.
See the “Service Schedule,” Section 4.13 (Page 22) for
air cleaner maintenance. See Section 1.5.1 (Page 6)
for air filter replacement part number.
Figure 4.6 — 7 kW, Engine Air Cleaner Location
Figure 4.7 — 12 kW and 15 kW Engine
Air Cleaner
4.6
SPARK PLUG(S)
Reset the spark plug(s) gap or replace the spark
plug(s) as necessary. See Section 4.13 (Page 22) for
maintenance requirements.
1. Clean the area around the base of the spark
plug(s) to keep dirt and debris out of the engine.
Clean by scraping or washing using a wire brush
and commercial solvent. Do not blast the spark
plug(s) to clean.
2. Remove the spark plug(s) and check the condi-
tion. Replace the spark plug(s) if worn or if reuse
is questionable. See Section 4.13 (Page 22) for
recommended inspection.
Cover
Filter
Screw
Air Cleaner
Fuel
Regulator
Oil Filter
Oil
Drain
Hose
Low Oil Switch
High Temp Switch
Loose
n
Section 4 — Maintenance
Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators
