Section 4 — Maintenance
Guardian
4.8.8 CHECK FAN BELT
•Inspect fan belts every three months. Replace any damaged, deteriorated, worn or otherwise defec- tive belt.
•Check fan belt tension. Thumb pressure, exerted midway between pulleys, should deflect about 3/8 to 5/8 of an inch. Adjust belt tension as required.
4.8.9 INSPECT ENGINE GOVERNOR
Visually inspect electronic governor.
7.Start engine and check for oil leaks.
4.8.11 CHANGING THE ENGINE AIR CLEANER
To replace the engine air cleaner, (part number 059402), simply remove the air cleaner cover and replace the air filter making sure it is positioned properly before reattaching the cover (Figure 4.1).
See the “Service Schedule,” for air cleaner mainte- nance.
4.8.12 SPARK PLUGS
DANGER
DANGER: Do not attempt to adjust the gover-
!nor. Only qualified service facilities should adjust the governor. Excessively high operat- ing 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 short- en engine life. Correct rated frequency and voltage are supplied only at the proper gov- erned speed. Some connected electrical load devices may be damaged by incorrect fre- quency and/or voltage. Only qualified service technicians should adjust the governed speed.
Reset the spark plug gap or replace the spark plugs as necessary (Figure 4.4). 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
4.8.10 CHANGING ENGINE OIL
Refer to maintenance performed by authorized service facilities 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 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 4.1) counterclockwise and remove. Properly 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 OVER TIGHTEN.
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).
After refilling the crankcase with oil, always
!check oil level on dipstick. NEVER OPERATE ENGINE WITH OIL BELOW THE DIPSTICK “ADD” MARK.
Figure 4.4 – Setting the Spark Plug Gap
SET PLUG GAP AT 1.07 - 1.17 mm |
(0.042 - 0.046 inch) |
4.8.13 COOLANT CHANGE
Every year, have an Authorized Service Facility drain, flush and refill the cooling system. See “Specifications” for cooling system recommenda- tions.
Generac® Power Systems, Inc. 19
