TP-5964 7/0110 Section 3 Scheduled Maintenance
3.4 Fuel System
3.4.1 Fuel Specifications
Use a clean, good quality diesel fuel oil with a cetane
number of 45 or greater. Clean fuel prevents diesel fuel
injectors and pumps from clogging. See Figure 3-4.
United States ISO 8217 DMA, BS 2869 Part 1 Class A1
or Part 2 Class A2
United Kingdom BS 2869-1983, Part 2 Class A2
Germany DIN 51 601-1978
Figure 3-4 Fuel Recommendations
Note: Never store diesel fuel in galvanized containers;
diesel fuel and the galvanized coating react
chemically to produce flaking that quickly clogs
filters or causes fuel pump or injector failure.
Note: Avoid storing fuel for more than one month. Take
special precautions to keep all dirt, water, and
other contaminants out of fuel to prevent the
growth of microbes. Microbes form slime, which
clogs the fuel filter and lines.
Note: Do not run the generator set out of fuel because
the fuel lines will draw in air. If the fuel lines draw
in air, bleed the fuel system before restarting the
unit.
3.4.2 Fuel Filter
The quality and condition of the fuel largely determine
the filter’s useful life. Do not clean the paper filter
element. Replace the fuel filter according to the service
schedule. Section 1 shows the fuel filter location. Use
the procedure below to replace the fuel filter.
Fuel Filter Replacement Procedure
1. Close the fuel supply valve.
2. Loosen the fuel filter by turning it counterclockwise.
Remove the fuel filter and use rags to clean up
spilled fuel oil. Dispose of the fuel filter in an
approved manner.
3. Clean the c ontact surface of the fuel oil filter
adapter.
4. Lightly lubricate the gasket surface of the new fuel
filter with fresh fuel oil. Thread the filter on the
adapter until the gasket makes contact;
hand-tighten an additional one-half turn. Wash
hands after any contact with fuel oil.
5. Open the fuel supply valve.
6. Bleed the system using information from
Section 3.4.3.
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