Fuel Economy Driving 193
Axles
An axle out of alignment will increase
rolling resistance. Regularly check the front
wheel alignment and axles on both the trac-
tor and trailer/semi-trailer. If they are
correct, there will be less rolling resistance
and, therefore, lower fuel consumption.
A good sign of an axle or wheel out of
alignment is uneven tire wear. Check the
tires often.
Engine
Faulty or incorrectly adjusted engine com-
ponents increase fuel consumption. The list
below gives some typical components that
can influence fuel consumption:
•
Blocked (on the outside) charge air
cooler/radiator package
•
Faulty thermostats
•
Blocked fuel filter
•
Blocked air intake filter
•
Faulty injectors
•
Dirty turbo charger
•
Air in fuel system
•
Faulty fuel supply pump
•
Faulty fuel relief valve
•
Faulty fan thermostat/clutch
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