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Revision A
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Figure 5.69: Primary Fuel Filter
—
Fuel Level
The primary filter is filled with fuel by stages:
1. In a new filter, the fuel level will be very low, and the fuel
can flow freely through the filter. Over time, contaminants
will collect on the filter from the bottom up. The fuel level in
the filter will rise as the filter element is obstructed.
2. The fuel level in the filter begins to rise. As contaminants
collect on the filter, the fuel rises to a non-contaminated
section of the filter.
3. The fuel filter is now more than half full. At this point, fuel
can still flow freely through the uncontaminated portion of
the filter element. The filter still has significant service life
remaining.
4. The filter element is now completely covered by fuel. At this
point, all of the filter element
’
s surface area is
contaminated. Fuel is not able to flow freely. At this point,
the fuel filter should be changed.
To remove and install a fuel filter, refer to the relevant set of procedures:
•
Removing Primary Fuel Filter, page 357
•
Installing Primary Fuel Filter, page 359
•
Removing Secondary Fuel Filter, page 362
•
Installing Secondary Fuel Filter, page 362
Removing Primary Fuel Filter
Removing the primary fuel filter requires disconnecting the filter from the water separation system and the fuel system.
DANGER
To prevent bodily injury or death from the unexpected startup of the machine, always stop the engine and remove the
key from the ignition before leaving the operator
’
s seat for any reason.
1.
Shut down the engine, and remove the key from the ignition.
2.
Open the hood to the highest position. For instructions, refer to
.
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Figure 5.70: Fuel Shut-off Valve
3.
On the bottom of the fuel tank, locate fuel shut-off
valve (A) and move it to the closed position.
