operators_manual

higher gear to bring engine rpm
within the optimum speed range.
•
When driving downhill: shift to a
lower gear, use the engine brake (if
so equipped), and use the service
brake, keeping the engine speed
below 2,100 rpm.
When the engine speed reaches its
maximum governed speed, the injection
pump governor cuts off fuel to the engine.
However, the governor has no control over
the engine rpm when it is being driven by
the vehicle's transmission, for example, on
steep downgrades. Apply service brakes or
shift to a higher gear. Fuel economy and
engine performance are also directly
related to driving habits:
• The best results in trip time and
fuel economy are obtained while
driving the vehicle at a steady
speed.
• Shift into higher or lower gears (or
apply the service brake) to keep
engine rpm near the lower end of
the optimum operating range.
• Avoid rapid acceleration and
braking.
WARNING
DO NOT look at the Instrument Cluster
Display for prolonged periods while the
vehicle
is moving. Only glance at the
monitor briefly while driving. Failure to
do so can result in the driver not being
attentive to the vehicle’s road position
or situation, which could lead to an ac-
cident and possible death, personal in-
jury, or equipment damage.
The Instrument cluster display provides
information to help the driver optimize
vehicle ef
ficiency. See Optimal Engine
Speed Indicator on page 185 for more
information. A driver will find the section
describing Trip Information and the rpm
detail useful.
Fuel Consumption
The vehicle's fuel consumption is
connected to five important factors:
maintenance, driving habits, general
condition of the road, traffic conditions, and
vehicle load.
Proper maintenance will keep the vehicle
running like new even after long periods of
use. The driver must perform the daily and
weekly checks of the vehicle.
Maintenance factors af
fecting fuel
consumption:
• Air and/or fuel filters partially
clogged
• Engine valves out of adjustment
• Injection pump improperly
synchronized
• Injection nozzles defective or
uncalibrated
• Improperly inflated tires
• Wheel bearings improperly
adjusted
• Clutch improperly adjusted or worn
(slipping)
• Fuel leaks
Wrong driving habits must be corrected
and the recommendations on economic
driving should be followed. Driving factors
affecting fuel consumption:
• Excessive speed and unnecessary
fast acceleration
• Long periods of idling
• Driving with foot resting on the
(manual transmission) clutch pedal
DRIVING - Driving Tips and Techniques
184 Y53-6110-1A1 (01/21)
4