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• If oil level is below the dipstick ADD mark, remove oil
fill cap. Add the recommended oil to bring oil level up
to the FULL mark. DO NOT FILL ABOVE THE
"FULL " MARK. (See Engine Oil Recommenations.)
Figure 4.2 - Oil Dipstick and Oil Fill Cap
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 separa-
tors. DO NOT USE TAP WATER IN BATTERY.
ENGINE COOLANT
Check coolant level in coolant recovery bottle. See
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.
MAINTENANCE OWNER/OPERATOR CAN
PERFORM
CHECK ENGINE OIL LEVEL
Refer to "Checking Fluid Levels".
CHECK BATTERY
• Check battery fluid level each week as outlined under
"Check Fluid Levels".
• Check battery cables for condition, tightness, corro-
sion or damage. Clean, tighten or replace as
necessary.
Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators
Start the generator engine at least once every seven days
and let it run at least 20 minutes. See "Weekly Exercise
Cycle".
OIL DIPSTICK
• Inspect engine cooling system at least once each
• Check hoses for damage, deterioration, leaks, etc.
• Check hose clamps for tightness.
See "Checking Fluid Levels".
Complete a thorough visual inspection of the entire
engine-generator monthly. Look for obvious damage,
loose, missing or corroded nuts, bolts and other fasten-
ers. Look for fuel, oil or coolant leaks.
Inspect the exhaust system at least once every three
months. Check all exhaust system pipes, mufflers,
clamps, etc. for condition, tightness, leaks, security,
damage.
• Inspect fan belts every three months. Replace any
• Check fan belt tension. Thumb pressure, exerted
Visually inspect electronic governor.
Section 4 — Maintenance
EXERCISE SYSTEM
INSPECT COOLING SYSTEM
month.
Correct any discrepancies found.
CHECK ENGINE COOLANT LEVEL
PERFORM VISUAL INSPECTION
INSPECT EXHAUST SYSTEM
CHECK FAN BELT
damaged, deteriorated, worn or otherwise defective
belt.
midway between pulleys, should deflect about 3/8 to
3/4 inch. Adjust belt tension as required.
INSPECT ENGINE GOVERNOR
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 gov-
erned speed. Some connected electrical load
devices may be damaged by incorrect frequency
and/or voltage. Only qualified service technicians
should adjust the governed speed.
Generac
®
Power Systems, Inc. 15
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