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20 Generac
®
Power Systems, Inc.
Section 6 — Scheduled Maintenance
Guardian Liquid-cooled 10 kW, 15 kW, 20 kW and 25 kW Generators
Maintenance Level 1 Level 2 Level 3 Level 4
Tasks
Recom- Task Required Task Required Task Task
mended Comp. to be done Comp. to be done Comp. Required Comp.
to be done (Date- 3 months/ (Date- Semi- (Date- to be done (Date-
monthly/ Initials) Break-in Initials) annually/ Initials) Annually/ Initials)
10 hrs. 30 hrs. 50 hrs. 100 hrs.
1. Disable the unit from
operating per the first page
warning.
2. Check the engine oil level.
Adjust as necessary.
3. Check the engine coolant
level. Adjust as necessary.
4. Check the engine coolant
thermal protection level.
Correct as necessary.
5. Check the natural gas
delivery system on gas
engine driven units.
Tighten connections as
necessary.
6. Check the diesel fuel
supply level for diesel
engine driven units. Fill
as necessary.
7. Drain water and sediment
from the diesel fuel tank on
diesel engine driven units.
8. Drain water from the fuel
line water separator on
diesel engine driven units
if the unit is equipped with
one.
9. Check the air inlets and
outlets for debris. Clean as
necessary.
10. Check the battery
electrolyte level if
accessible. Adjust as
necessary.
11. Check the battery posts,
cables, and charger for
loose connections,
corrosion, and proper
operation. Correct as
necessary.
12. Check the unit wiring for
loose connections,
corrosion, and damage.
Correct as necessary.
13. Check the engine
accessory drive belts for
wear, weather cracking,
and damage. Replace as
necessary.