Kohler 13ERG User Manual download pdf (Page 20)

TP-6335 9/0410 Fuel System

5.1.1 Fuel Lines

Note: Keep fuel lines away from the exhaust system.

Routing fuel lines. Take care when routing the fuel line

from the fuel tank to the generator set. Keep the fuel

lines as short as possible but maintain adequate

clearance from the exhaust system. Route the fuel lines

along the frame or undercarriage—never route the fuel

lines inside the habitable area of the vehicle. Locate the

fuel lines with the entry point near the fuel pump. See

Section 5.4 for the fuel pump lift.

Sizing fuel inlet and return lines. Size the fuel line to

handle the flow of fuel and to withstand road shock and

year-round climate conditions. Use steel tubing as the

codes require. Use 8 mm (0.31 in.) ID tubing with a

230 mm (8 in.) (minimum) flexible section to allow free

movement of the generator set.

Flexible hose sections. If a metal fuel line draws fuel

from the fuel tank, install a flexible hose section to

connect the metal line to the fuel pump. The flexible

section allows generator set vibrational motion during

operation. See Section 7 for the fuel inlet and the fuel

return connection points.

Note: Gasoline-fueled engines require a type A1 hose.

5.2 Fuel Filters or Strainers

Gasoline model generator sets are shipped with a fuel

filter. No additional fuel filter or strainer is required.

ADV-6450-E

1. Fuel filter

Figure 5-2 Fuel Filter Location (Gasoline Models)

5.3 LP Gas

LP fuel hose. Use a flexible fuel hose designated for

use with LP fuel between the generator set and the main

fuel tank. See Section 7 for the fuel inlet connection

point. Take care when routing the fuel line. Maintain a

51 mm (2 in. ) clearance between the fuel line and any

bare exhaust component. Do not tie any electrical wiring

to the fuel line. If the flexible fuel line passes through

sheet metal, install grommets or clamps to prevent hose

abrasion. The LP fuel system shall conform to

Section 3-6.4 of NFPA58, Storage and Handling of

Liquified Petroleum Gases.

For an LP gas system, use UL classified pipe joint

sealing compound to prevent dangerous fuel leaks. Use

a sealing compound approved for use with LP gas.

Apply UL classified sealing compound at all fuel line pipe

joints.

Use flexible fuel lines in areas where vibration and/or

movement of connected components is likely, such as

the main fuel line to the generator set. Use seamless

steel tubing wherever long main fuel lines are required.

Testing the fuel system. After all of the LP connections

have been completed, pressure test the entire system to

6--8 ounces (10--14 inches) water column. Test the

connections for leakage with soapy water or bubble

solution. Do not use solutions that contain ammonia or

chlorine since the solution will not bubble for an accurate

leakage test.

The gas supply pressure should not exceed 6 ounces.

To check the inlet pressure, remove the plug on the fuel

inlet for the gas regulator. Insert an ounce pressure

gauge or manometer. Adjust the operating pressure to

4--6 ounces or 7--11 inches water column; adjust the

inlet pressure on the primary regulator.

Note: Fuel leakage could cause an explosion. After

making all LP gas connections, pressure test the

entire system to 6--8 ounces (10--14 inches)

water column.

Note: Gas pressure above 10 ounces can result i n non

operation of the gas valve.

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Kohler 13ERG User Manual Page 20

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