Section 4 — Maintenance
Guardian
DANGER
Do not attempt to adjust the governor. Only
!qualified service facilities should adjust the governor. Excessively high operating speeds are dangerous and increase the risk of personal injury. Low speeds impose a heavy load on the engine when adequate engine power is not available and may shorten engine life. Correct rated frequency and voltage are supplied only at the proper governed speed. Some connected electrical load devices may be damaged by incorrect frequency and/or voltage. Only quali- fied service technicians should adjust the gov- erned speed.
4.5.10 CHANGING ENGINE OIL
Refer to maintenance performed by authorized serv- ice facilities for engine oil and filter change frequen- cies.
Drain the oil while the engine is still warm from run- ning. This means warm up the engine, shut it down and drain immediately as follows:
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
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).
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.
7.Start engine and check for oil leaks.
4.5.11 CHANGING THE ENGINE AIR CLEANER
To replace the engine air cleaner, (part number 059402), remove the air cleaner cover and replace the air filter making sure it is positioned properly before reattaching the cover (Figure 4.3).
Figure 4.3 – Engine Air Cleaner
See the “Service Schedule,” Section 6, for air cleaner maintenance.
4.5.12 SPARK PLUGS
Reset the spark plug gap or replace the spark plugs as necessary. See Section 6.
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 com- mercial 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 the “Service Schedule,” Section 6, for recommended inspection.
3.Check the spark plug gap using a wire feeler gauge. Adjust the gap to
OIL FILTER
Generac® Power Systems, Inc. 17
