OM843NW2 10/09
14
Servicing
FUELS - GENERAL
1. Use only clean, high quality fuels of the following
specifi cations, as defi ned 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 and for all temperatures at an altitude
of above 5,500 ft. (1500 meters).
2. Use fuel having less that 1% sulphur (preferably
less that 0.5%).
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.
f. Diesel fuel with engine oil mixed in.
5. Do not use any fuel additive other than an
authorized diesel fuel biocide if fungus or bacteria
cause fuel system problems.
6. 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 and
possible biological contamination.
d. If biological contamination is detected or
suspected, contact your dealer for assistance.
SP7-9. FUEL FILTERS
Figure 8: Primary Fuel Filter.
1. Your generator set should have a primary fuel fi lter
installed. We recommend the Racor brand of fuel
fi lter-water separators.
a. Check the primary fuel fi lter daily as
recommended by the fi lter manufacturer.
Empty the collection bowl as necessary.
b. Change the element as often as necessary or
every 500 hours.
c. If the bowl fi lls with water, change the primary
and secondary element immediately.
2. Change secondary fuel fi lter every 500 hours.
NOTE: The fuel fi lter on the engine is considered the
“secondary fuel fi lter.”
a. Remove the spin-on fi lter by turning it
counterclockwise with a fi lter wrench. Fill the
new cartridge 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 fi lter base. Then, tighten it
two-thirds of a turn by hand. Do not overtighten.
b.
Fuel
fi lter part numbers are:
843NW2 – #130336020
Primary
Fuel Filter
Part Numbers
Complete Unit:
24-50002
Element:
24-50012
