Fuels - General; Fuel Filters - Northern Lights M773LW3 Operator's Manual

FUELS - GENERAL

1. Use only clean, high quality fuels of the following
specifications, as defined by ASTM designation D975
for diesel fuels:
a. Use grade no. 2 diesel at ambient temperatures
above freezing 32°F (0°C).
b. Use grade no. 1 at ambient temperatures below
freezing.
2. Use low sulphur or ultra low sulphur fuel.
3. The cetane number should be a minimum of 45.
4. DO NOT use these unsuitable grades of fuel:
a. Domestic heating oils, all types.
b. Class B engine.
c. Class D domestic fuels.
d. Class E, F, G or H industrial or marine fuels.
e. ASTM-D975-60T No. 4-D and higher number
fuels.
5. Storing fuel:
a. Keep dirt, scale, water, and other foreign matter
out of fuel.
b. Avoid storing fuel for long periods of time.
c. Fill the fuel tank at the end of each day's
operation. This will reduce condensation.
Updated 10-19-20
Servicing

FUEL FILTERS

1. Your generator set should have a primary fuel filter
installed. We recommend the Racor brand of fuel
filter-water separators.
SP-7. PRIMARY FUEL FILTER
a. Check the primary fuel filter daily as
recommended by the filter manufacturer.
Empty the collection bowl as necessary.
SP-8. PRIMARY FUEL FILTER ELEMENT
b. Change the element as often as necessary or
every 500 hours.
c. If the bowl fills with water, change the primary
and secondary element immediately.
SP-9. SECONDARY FUEL FILTER
2. Change secondary fuel filter every 500 hours or as
necessary.
a. Remove the spin-on filter by turning it
counterclockwise with a filter wrench. Fill the
new element with fuel and install it after
applying engine oil to gasket surface. Screw on
until the gasket surface comes into contact with
sealing surface of filter base. Then, tighten it
two-thirds of a turn by hand. Do not overtighten.
b. Fuel filter part number is:
M773LW3(G): #24-52020
OM773LW3 11/20
18