CONTROLS AND INSTRUMENTS 4-61
PA1628 H3-41, H3-45 Operator’s Manual
HORNS
The electric horn (city horn) and air horn
(highway horn) are operated from the steering
wheel center pad. Use the Horn Selector switch
located on the lateral control panel to select the
appropriate horn type.
NOTE
When the vehicle is stationary, the electric
horn will sound to inform the driver that a fire
is detected in the engine compartment.
STEERING WHEEL
14
0
68_1
TRANSMISSION RETARDER
The transmission retarder is available only with
the Allison transmission.
The retarder can be operated using a hand lever
mounted on the steering wheel column or using
the service brake pedal.
To use the transmission retarder, it must be
activated first by pressing one of the two
Retarder/Engine Brake buttons on the steering
wheel.
Operating the Retarder Using the Hand Lever
RETARDER HAND LEVER
07043
With the retarder enabled and the accelerator
pedal released, move the output retarder lever
clockwise from the first to the sixth position.
The braking effect occurs as soon as the
accelerator pedal is released. The braking level
for each position is as follows:
Position
Braking level (up to)
Initial
Varies with brake pedal position. No effect
upon release of the accelerator pedal.
16%
33%
49%
71%
89%
100%
NOTE
The output retarder lever is located on the
right side of the steering column.
Operating the Retarder Using the Brake Pedal
With the retarder enabled, the accelerator pedal
released and the output retarder lever in the
initial position
, depressing the brake pedal will
engage both the service brake and the
transmission retarder. This is referred to as
retarder-brake blending. The further the pedal is
depressed, the more total braking power is
provided. Refer to
Section 5
Other Features
for
further information about the transmission
retarder.
Summary of Contents for H 2018 Series
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