9
Fuel Connections
See the Operator’s Manual for recommended fuels
and Specifications for fuel consumption rates.
WARNING
Gasoline is flammable and explo-
sive and can cause severe personal injury or
death. Do not smoke or allow any flame, spark,
pilot light, arc-producing equipment, switches
or other ignition sources around fuel or fuel
components, or in areas sharing ventilation.
Keep an ABC fire extinguisher handy.
Onan recommends a separate fuel pickup tube or a
separate fuel tank for the genset. The genset must
never be connected to the fuel supply line of the
vehicle engine—either to a high-pressure system
(pump in tank), which can overpressurize the gen-
set fuel system, or to a vacuum system (pump on
engine), which can cause the genset to starve for
fuel. Some vehicle chassis manufacturers allow
connections to the fuel return line on high pressure
fuel systems. Contact the vehicle chassis manufac-
turer for approval. Fuel line pressure at the point
where the genset is connected must not exceed
1-1/2 psi under any condition.
WARNING
Excessive fuel pressure can flood
the genset causing a fire. Genset fuel supply
line pressure must not exceed 1-1/2 psi under
any condition.
For separate fuel pickup tube installations:
1. Contact the vehicle chassis manufacturer
regarding installation of the second fuel pickup.
Do not change or remove the fuel fill tube, fill
limiter vent, vapor canister, vapor lines, filler
cap or any other part of the fuel system without
the approval of the vehicle chassis manufac-
turer. Doing so could affect vehicle engine
operation or vehicle emissions regulation com-
pliance.
2. Terminate the genset pickup above the vehicle
pickup to prevent the genset from running the
vehicle out of fuel.
Note: Federal standards for vehicle fuel tanks may
require the installation of an automatic shutoff valve
at the genset fuel tank pickup to prevent leakage in
the event of a roll-over. Federal standards for vehicle
impact, roll-over and emmisions may also apply to a
separate genset fuel tank. Check with the vehicle
chassis manufacture regarding these standards.
Redistribution or publication of this document,
by any means, is strictly prohibited.
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