Instruments and Controls Operating Instructions
– 22 – Y53-6008
Medium Duty (R10/06)
Tachometer
The vehicle's tachometer measures the engine speed in rev-
olutions–per–minute (rpm). Watching the tachometer is
important to driving efficiently. It will let you match driving
speed and gear selection to the operating range of your
engine. If the engine speed gets too high, you can select a
higher gear to lower the rpm's. If the engine speed drops too
low, you can select a lower gear to raise the rpms. See page
99 for further instructions on driving techniques and using the
tachometer.
• To avoid engine damage, do not let the pointer exceed
maximum governed speed.
• When driving downhill, shift to a lower gear and use the
service brake, keeping the engine speed below the max-
imum governed speed.
The hour meter (option) records the time in hours the engine
is operating.
Tachometer
02586
HOURMETER
(OPTION)
