Section 4 Fuel System; General; Fuel Filter - Kohler 20EORZD Manual

4.1 General

Use a clean, good quality diesel fuel oil with a cetane
number of 45 or greater. Clean fuel prevents the diesel
fuel injectors and pumps from clogging.
Fuel Recommendations
United States ISO 8217 DMA, BS 2869 A1 or A2
United Kingdom BS 2869-1983, Part 2 Class A2
Germany DIN 51 601-1978
Japan JIS. No. K2204-2
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 that
clogs the fuel filter and lines.
Note: Do not run the generator set out of fuel because
the fuel lines will draw in air and necessitate
bleeding the fuel system before restarting the
unit.

4.2 Fuel Filter

Clean the fuel filter with fresh fuel oil and compressed
air. The filter's useful life will be determined largely by
the quality and condition of the fuel used. Under normal
conditions, replace the fuel filter element at the specified
interval in the service schedule.
procedure to replace the fuel filter.
TP-6359 7/08
Use the following

Section 4 Fuel System

Replacement Procedure:
1. Place the generator set master switch in the OFF
position.
2. Disconnect the generator set engine starting
battery, negative (--) lead first.
3. Close the fuel supply valve.
4. 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 and rags in
an approved manner.
5. Clean the contact surface of the fuel oil filter
adapter.
6. Lightly lubricate the gasket surface of the new fuel
filter with fresh fuel oil. Thread the filter on the
adapter until the
hand-tighten the filter an additional one-half turn.
Wash hands after any contact with fuel oil.
7. Open the fuel supply valve.
8. Reconnect the generator set engine starting
battery, negative (--) lead last.
9. Prime the fuel system. See Section 4.2.1, Priming
the Fuel System.
1
2
3
4
<
1. Fuel filter adapter
2. Fuel filter
3. Removal (counterclockwise)
4. Installation (clockwise)
Figure 4-1 Spin-On Fuel Oil Filter
gasket makes contact;
<
TP-606111
Section 4 Fuel System 21