Section 4 — Maintenance
Centurion
Figure 4.1 - Oil Dipstick and Oil Fill Cap
OIL DIPSTICK
4.5.4 INSPECT COOLING SYSTEM
•Inspect engine cooling system at least once each month.
•Check hoses for damage, deterioration, leaks, etc. Correct any discrepancies found.
•Check hose clamps for tightness.
•Check fluid levels as outlined above.
4.5.5 PERFORM VISUAL INSPECTION
Complete a thorough visual inspection of the entire generator monthly. Look for obvious damage, loose, missing or corroded nuts, bolts and other fasteners. Look for fuel, oil or coolant leaks.
4.4.2 BATTERY FLUID
Check battery electrolyte fluid at least once weekly. Fluid should cover separators in all battery cells. If fluid level is low, add distilled water to cover tops of separators. DO NOT USE TAP WATER IN BATTERY.
4.4.3 ENGINE COOLANT
Check coolant level in coolant recovery bottle. See Section 1.10, Specifications.
•Add recommended coolant mixture as necessary.
•Periodically remove radiator pressure cap to make sure the coolant recovery system is functioning properly. Coolant should be at bottom of radiator filler neck. If coolant level is low, inspect gasket in radiator pressure cap. Replace cap, if necessary. To have pressure cap tested, contact an authorized Generac Service Dealer. Inspect cooling system and coolant recovery system for leaks.
4.5MAINTENANCE OWNER/ OPERATOR CAN PERFORM
4.5.1 CHECK ENGINE OIL LEVEL
Refer to “Checking Fluid Levels”, Section 4.4.
4.5.2 CHECK BATTERY
•Check battery fluid level each week as outlined under “Checking Fluid Levels”, Section 4.4.
•Check battery cables for condition, tightness, corrosion or damage. Clean, tighten or replace as necessary.
4.5.3 EXERCISE SYSTEM
Start the generator engine at least once every seven days and let it run at least 20 minutes. See Section 3.5, “Weekly Exercise Cycle”.
16 Generac® Power Systems, Inc.
4.5.6 INSPECT EXHAUST SYSTEM
Inspect the exhaust system at least once every three months. Check all exhaust system pipes, mufflers, clamps, etc. for condition, tightness, leaks, security, damage.
4.5.7 CHECK FAN BELT
•Inspect fan belts every three months. Replace any damaged, deteriorated, worn or otherwise defective belt.
•Check fan belt tension. Thumb pressure, exerted midway between pulleys, should deflect about 3/8 to 3/4 inch. Adjust belt tension as required.
4.5.8 INSPECT ENGINE GOVERNOR
Visually inspect electronic governor.
DANGER
Do not attempt to adjust the governor. Only
!qualified service persons 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 qualified technicians should adjust the governed speed.
4.5.9 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 running. This means warm up the engine, shut it down and drain immediately as follows: