8-5 62-11039
8.4 SERVICING FUEL PUMP
8.4.1 Mechanical Pump (See Figure 8--2)
Due to foreign particles in the fuel and wax as a result of
using the wrong grade of fuel or untreated fuel in cold
weather, the fuel filter may become plugged or
restricted, and the engine will lose capacity. The filter
must be cleaned on a regular schedule such as unit
pre-trip or when the oil and fuel filters are changed
(Refer to Section 8.1).
1
2
3
1
4
1. Nut
2. Banjo
3. Filter
4. Copper Rings
Figure 8--2. Mechanical Fuel Pump
1 Turn nut counter-clockwise to loosen and remove
(item 1, Figure 8--2).
2 Remove banjo fitting (item 2) and let it hang loose,
making sure to keep copper rings (item 4) for replace-
ment.
3 Turn filter (item 3) counter-clockwise and remove.
Check and clean.
4 To install reverse steps 1 through 3.
8.4.2 Electrical Pump -- Optional (See Figure 8--3)
To Check or Replace Filter
1 Remove 3 screws from cover (item 1, Figure 8--3).
2 Remove cover, gasket and filter.
3 Wash filter in cleaning solvent and blow out with air
pressure. Clean cover.
WARNING
Carefully protect eyes from solvent.
4 To Install reverse above steps.
1
2
3
1 Cover
2 Gasket
3 Filter
Figure 8 --3. Electric Fuel Pump (Optional)
8.5 FUEL LEVEL SENSOR
An optional fuel level sensor (p/n 12-01147-00) supplies
an input signal to the microprocessor as to the % of fuel
remaining in the fuel tank. The microprocessor then
turns on the Check Fuel Level Alarm when the level
reaches 15%, and (if configured to do so) turns the
engine off when the level reaches 10%.
The 12-01147-00 sensor has the capability of sending
the fuel level (from 0% to 100%) to the microprocessor.
The fuel tank level will be displayed in the Unit Data List.
This sensor may be calibrated if necessary.
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