Servicing Schedule Chart - Northern Lights NL773LW4 Operator's Manual

The Servicing Schedule Chart below shows the service schedule required for proper maintenance of your generator
set. More detailed coverage of each Service Point (SP) is listed on the page noted in the 'page' column.
DAILY:
SP1 Check oil level in engine
SP5 Check V-belt tension
SP7 Check primary fuel filter
SP13 Check coolant level
SP18 Check electrolyte in batteries
AFTER FIRST 50 HOURS:
SP2/3 Change engine oil and filter
SP6 Adjust valves
AFTER FIRST 100 HOURS:
SP2/3 Change engine oil and filter
EVERY 250 HOURS:
SP2/3 Change engine oil and filter
SP4 Check air cleaner
SP16 Check and clean radiator
SP19 Check state of charge of batteries
SERVICE
PAGE OPERATION
POINT
ENGINE:
SP1 8 & 12 Check oil level
SP2 12 Change engine oil
SP3 12 Change lube oil filters
SP4 13 Check air cleaner
SP5 13 Check V-belt tension
SP6 13 Check valve clearances
FUEL SYSTEM:
SP7 14 Check primary filter (Racor)
SP8 14 Change primary filter element (Racor)
SP9 14 Change secondary fuel filter
SP10 15 Bleed the fuel system
SP11 17 Check injectors
SP12 17 Check fuel injection pump
COOLING SYSTEM:
SP13 8 & 17 Check coolant level
SP14 18 Check and flush cooling system
SP16 18 Check and clean radiator fins
ELECTRICAL SYSTEM:
SP18 19 Check electrolyte level in batteries
SP19 19 Check condition of batteries with hydrometer
OUT OF SERVICE:
SP20 19 Winterizing or out-of-service
1) Perform all maintenance once a year even if hour level has not been reached.
2) Consult manufacturer's maintenance schedule, note on chart.
3) Whenever necessary.
4) More often if necessary.
5) After first 50 hours, then after 100 hours, then at every 250 hours.

Servicing Schedule Chart

EVERY 500 HOURS:
SP2/3 Change engine oil and filter
SP8
SP9
EVERY 1000 HOURS:
SP4
SP6
SP11 Check injectors
EVERY 2500 HOURS:
SP12 Check fuel injection pump
SP14 Check and flush cooling system
DAILY
•
1) 5)
1) 5)
1) 4)
•
1) 2)
•
2) 3)
2) 3)
1) 3)
3)
1) 3) 6) 7)
7)
•
1) 4)
1) 4)
3)
6) Clean injection nozzles every 1500 hours.
7) For EPA emission standards fuel nozzle needs to be
cleaned every 1500 hours, the fuel nozzle and fuel pump
need to be cleaned, adjusted, or repaired every 3000
hours, and the quality guarantee for these parts is 1500
hours or 2 years.
ONL773LW4 5/21
13
Change primary fuel filter element
Change secondary fuel filter
Change air cleaner element
Check valve clearances
50 250 500
Hours Hours Hours
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• •
•
•
•
•
•
•
1000 2500
Hours Hours
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•
•
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