Figure 6-21.—Fuel-service truck diagram.
CAUTION
Allowing the engine to run with the
transmission engaged and the transfer case shift
lever in NEUTRAL without the PTO in the
ENGAGE position will cause bearing failure in
the transfer case.
Be sure to shift the
transmission gearshift lever to NEUTRAL
when not operating the power takeoff.
After the fuel dispensing pump is engaged set the
throttle rpm to the manufacturer’s recommended
setting. Move the discharge valve control levers to the
open position; and be sure, before pumping operations
begin, to attach the grounding wire to the vehicle being
serviced. Open the pump delivery line hose and squeeze
the nozzle operating lever to discharge the fuel.
After discharging the fuel, close the pump delivery
line gate valve, and move the discharge valve control
operating lever to the CLOSED position.TIhen close the
automatic dump valve drain tube valve. Return to the
driver’s compartment; set the rpms to idle, depress the
clutch and place the transmission gearshift lever in
NEUTRAL; then place the transfer power takeoff
shifting lever to DISENGAGED, and stop the engine.
When changing from one type of fuel to another,
drain and flush the fuel compartments, pump
filter/separator, service lines, manifold, meter, gauge,
and dispensing hoses and nozzles.
NOTE: All pumping mechanisms are not
controlled and operated in the same manner. Each make
or model operates differently. If you are in doubt as to
the proper pump operation and maintenance procedures,
study the operator’s manual and the caution and
instruction plates located near the pump and control
mechanisms.
Fuel Safety
Drivers of fuel tank trucks must observe safe driving
practices, some of which are listed below.
l Drive defensively and make allowances for other
drivers.
. Make turns only
intent to other drivers.
from proper lanes, and signal
Never leave the proper lane
6-27
