Generac
®
Power Systems, Inc.
17
1. Remove OIL DRAIN HOSE from its retaining clip.
2. Loosen and remove OIL DRAIN HOSE CAP. Drain
oil completely into suitable container.
3. When all oil has drained, install and tighten OIL
DRAIN HOSE CAP, and re-install into its retaining
clip.
4. Turn OIL FILTER (Figure 4.2) counterclockwise
and remove. Dispose of old filter.
5. Apply light coating of new engine oil to seal of new
oil filter. Install FILTER and tighten by hand only.
DO NOT OVERTIGHTEN.
6. Remove OIL FILL CAP. Add recommended oil (see
SPECIFICATIONS). DO NOT FILL ABOVE THE
DIPSTICK “FULL” MARK. Crankcase oil capacity
is 4.0 U.S. quarts (3.8 liters).
7. Start engine and check for oil leaks.
Figure 4.2 - Oil Filter
After refilling the crankcase with oil, always
check oil level on dipstick. NEVER OPERATE
ENGINE WITH OIL BELOW THE DIPSTICK
“ADD” MARK.
4.5.10 CHANGING THE ENGINE AIR CLEANER
To replace the engine air cleaner, (part number
059402), remove the air cleaner cover and remove air
cleaner. Clean bottom plate and install the air filter
making sure it is positioned properly before
reattaching the cover (Figure 4.3).
Figure 4.3 – Engine Air Cleaner
See “Scheduled Maintenance”, Section 4.7, for air
cleaner maintenance.
4.5.11 SPARK PLUGS
Reset the spark plug gap or replace the spark plugs
as necessary. See Section 4.7.
1. Clean the area around the base of the spark plugs
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 plugs
to clean.
2. Remove the spark plugs and check the condition.
Replace the spark plugs if worn or if reuse is
questionable. See “Scheduled Maintenance”,
Section 4.7, for recommended inspection.
3. Check the spark plug gap using a wire feeler
gauge. Adjust the gap to 0.5-0.6 mm (0.020-0.025
inch) by carefully bending the ground electrode
(Figure 4.4).
Figure 4.4 – Setting the Spark Plug Gap
4.5.12 COOLANT CHANGE
Every year, have Authorized Service Facility drain,
flush and refill the cooling system. See Section 1.10,
SPECIFICATIONS, for cooling system recommen-
dations.
4.6
MISCELLANEOUS MAINTENANCE
4.6.1 CLEANING THE GENERATOR
Keep the generator as clean and as dry as possible.
Dirt and moisture that accumulates on internal
generator windings have an adverse effect on
insulation resistance.
Periodically clean generator exterior surfaces. A soft
brush may be used to loosen caked on dirt. Use a
vacuum system or dry, low pressure air to remove
any accumulations of dirt. The generator is housed
inside an all-weather enclosure, clean the enclosure
with a soft, damp cloth or sponge and water. Apply a
coat of automotive type wax once a year to help
prevent corrosion.
Air Cleaner
(Doors Removed for Clarity)
!
OIL FILTER
Section 4 — Maintenance
Centurion Liquid-cooled 15 kW and 25 kW Generators
SET PLUG GAP AT 0.5-0.6 mm
(0.020-0.025 inch)