Generac Power Systems QT 5.4L Owner'S Manual Download Page 18

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ENGINE COOLANT

Check coolant level in coolant recovery bottle. See the
“Specifications” section.

• 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
Service Dealer. Inspect cooling system and coolant
recovery system for leaks.

MAINTENANCE OWNER/
OPERATOR CAN PERFORM

CHECK ENGINE OIL LEVEL

Refer to the “Checking Fluid Levels” section.

CHECK BATTERY

• Check battery fluid level each week as outlined

under “Check Fluid Levels”.

• Check battery cables for condition, tightness, cor-

rosion or damage. Clean, tighten or replace as
necessary.

EXERCISE SYSTEM

Start the generator engine at least once every seven
days and let it run at least 20 minutes. See the
“Weekly Exercise Cycle” section.

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 ENGINE COOLANT LEVEL

See the “Checking Fluid Levels” section.

PERFORM VISUAL INSPECTION

Complete a thorough visual inspection of the entire
engine-generator monthly. Look for obvious damage,
loose, missing or corroded nuts, bolts and other fas-
teners. Look for fuel, oil or coolant leaks.

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.

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 inch. Adjust belt tension as required.

INSPECT ENGINE GOVERNOR

Visually inspect electronic 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 governed speed. Some connected
electrical load devices may be damaged by incor-
rect frequency and/or voltage. Only qualified
service technicians should adjust the governed
speed.

CHANGING ENGINE OIL

Refer to maintenance performed by authorized ser-
vice 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 re-install into its retaining
clip.

4. Turn OIL FILTER (Figure 10.2) counterclockwise

and remove. Dispose of old filter.

5. Apply light coating of new engine oil to seal of new