King Long XMQ6129Y series, Operating Manual

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Vehicle Starting and Driving
S-4
4. Fuel level
Turn the ignition key to drive position (on).
Check the fuel level on the indicator. If necessary, fill up
the fuel tank.
(but direct viewing by open the tank cover is
preferred).
Eliminate deposite water in diesel filter in time and check
fuel pipe for no leakage. Ensure sealing performance of fuel
tank and before opening fuel tank, wipe up clay and dirt.
Before filling up, shut down engine.
Do not drive vehicle to empty tank. When the level
indicator is on the red bar, refuel the vehicle to avoid air
from entering the fuel system.
Fill the tank only with good quality fuel free of
contaminants.
The fuel might as well be filled up when
running in the humid area to avoid inner rustiness.