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3.4 Fuel Lines and Hoses
Note: Keep all fuel lines and hoses away from the
exhaust system.
Routing fuel hoses. Take care when routing fuel lines
and hoses from the fuel tank to the generator set. Keep
each fuel hose length as short as possible but maintain
adequate clearance from the exhaust system, frame
rail, and fairings. Route hoses along the frame rail or
undercarriage—never route fuel lines or hoses inside
the sleeper cab.
Provided fuel line sizes:
Fuel Return Line
Fuel Supply Line
Use only the fuel tank connection kit included with the
APU. Figure 3-2 identifies maintenance and service
parts for your fuel tank connection kit.
complete list of maintenance and service parts from
your authorized Kohler distributor/dealer.
Part Description
Fuel Tank Connection Kit
Figure 3-2 Maintenance and Service Parts
3.4.1
Installing the Fuel Lines
1. Locate the fuel tank closest to the generator set,
under the cab.
2. Use a 44 mm (1 3/4 in.) dia. hole saw and drill a hole
in the top of the fuel tank. See Figure 3-3.
2
1. Fuel tank
2. Drill
Figure 3-3 Drill Hole into Fuel Tank
Note: Avoid contamination of fuel tank by blowing air to
remove debris when drilling the hole.
3. After all debris is removed, remove the drill from the
fuel tank.
16
Section 3 Fuel System
6.4 mm (1/4 in.) dia.
8 mm (5/16 in.) dia.
Obtain a
Part Number
GM52273
1
4. Deburr the edges of the drilled hole.
5. Place the preassembled bulkhead seal near the
top on the end the fuel tank. Position the fuel return
line so that it is flush with the end of the fuel tank.
See Figure 3-4.
2
Indicate
25-50 mm
(1-2 in.)
from
bottom of
fuel tank.
1. Fuel tank
2. Drilled hole in fuel tank
3. Fuel return line
Figure 3-4 Measure Depth of Fuel Tank
6. Measure the depth of the fuel tank.
Note: The fuel line kit is designed to fit a 660 mm
(26 in.) dia. fuel tank. For tanks that are
660 mm (26 in.) dia. or larger, proceed to
step 12. For tanks that are smaller than
660 mm (26 in.) dia. proceed to step 7.
7. Scribe one mark on the fuel return line to indicate
the bottom depth measurement of the fuel tank.
8. Subtract 25-50 mm (1-2 in.) from the bottom depth
mark and scribe another mark on the fuel return line
to indicate the new depth requirement.
Note: The fuel return line should be no further than
25 mm (1 in.) to 50 mm (2 in.) from the
bottom depth of the fuel tank.
Figure 3-4.
9. Scribe one mark on the fuel supply line to indicate
the bottom depth measurement of the fuel tank.
3
Dimensions are
mm (in.) and not
to scale.
1
TP-6583 3/08
See
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