2-10. Operating Fuel
Selector Valve (Gasoline and Diesel
Trucks with Dual
Changing from one fuel tank to the other must be accomplished before tank in use
is completely empty (e.g., between 1/4 full and empty).
Turn fuel tank selector switch (1) and check fuel gage (2) to determine which tank has
b. Turn fuel selector valve lever (4) (located on cab floor near the handbrake lever) to right
or left (R or L) position for tank you have selected
2-11. Operating Fuel Transfer Pump
(Multifuel Trucks with Dual
Transfering fuel from reserve tank to main tank should be accomplished before
main tank is completely empty (e.g., between 1/4 full and empty).
a. Turn fuel tank selector switch (1) and check fuel gage (2) to determine if reserve tank has
fuel to transfer.
b. Move fuel transfer pump switch (3) to ON position and transfer fuel from reserve tank to
c. Return fuel transfer pump switch to OFF position when transfer operation has been
The fuel transfer pump switch must be in the OFF position whenever the fuel gage
indicates reserve tank is empty.