User Manual
Table Of Contents
- Safety
- Emergency
- Controls
- Entering and Leaving the Vehicle
- Doors
- Electrically Operated Windows
- Heated Mirrors
- Mirrors
- Electrical Mirror Adjustment
- Windshield Wiper Blades
- Roof Console
- Sun Visors
- Stepwell Lighting
- Interior Lighting
- Dashboard
- Control Panel
- Control Panel of Heating/Ventilation System
- Air Conditioning Switch
- Fan Speed Selector Switch
- Temperature Adjustment
- Air Distribution Selector Switch
- Center Console
- Left-Hand Steering Column Switch
- Right-Hand Steering Column Switch
- Steering Wheel Switches
- Adjustable Steering Column
- Seats
- Master Display
- PDC and Voltage Display
- Power Distribution Center (PDC)
- Voltage Converter
- Driving
- General
- Steering Lock/Contact/Starter Switch
- Glow System
- Starting Procedure
- Engine Speed Control
- Cruise Control
- Adaptive Cruise Control (Optional)
- Vehicle Speed Limitation for Special Applications
- Driving Style
- Steering
- ABS Brakes
- Park Brake and Service Brake
- Engine Brake
- Stopping
- Allison Automatic Gearbox
- Maintenance
- Introduction
- Air Dryer
- Overhaul
- Air Tanks
- Air Gauges and Air Leaks
- Air Compressor
- Overview of Daily Checks
- Opening the Front Panel
- Engine Oil Level
- Topping Up Coolant
- Special Coolant Fill Instructions
- Windshield Washer Reservoir Fluid Level
- Air Filter Indicator
- Wheels and Tires
- Lighting and Instruments
- Driver's Seat and Mirrors
- Overview of Weekly Checks
- Power Steering Fluid Level
- Brake System Air Drier
- Draining the Water Separator
- Batteries
- General Maintenance
- Cab Maintenance
- Cleaning
- Preventative Maintenance before the Winter Season
- Diesel Fuel
- Windshield Washer Reservoir
- Maintenance after the Winter Season
- Cooling System
- Information
- Glossary
- Index
Park Brake and Service
Brake
WARNING
Always apply the parking brake when
parking the vehicle. Do not release the
parking brake while the steering lock is
still engaged. The vehicle cannot be
steered if the steering lock is still en-
gaged.
The service brake is operated by the foot
pedal. If the service brake fails to operate
owing to insufficient air pressure, the
parking brake can be used as an
emergency brake. Moving the parking
brake lever slowly backwards as far as the
stop will gradually brake the vehicle or
combination in a controlled manner. The
parking brake is engaged by moving the
parking lever back past the locking cam.
On a vehicle with a drawn vehicle
connection, the parking brake has a test
position. The parking brake is disengaged
by lifting the locking ring up against the
spring pressure and letting the parking
brake lever move forwards.
Engine Brake
The engine brake is primarily intended for
prolonged braking, for example when
decelerating from high speed on a level
road or when driving downhill. This
reduces service brake wear.
The engine brake is activated by operating
steering wheel switch (C).
NOTE
• The engine brake is activated by
operating steering wheel switch
(C).
• To save the service brakes and
to prevent the engine brake
valve from becoming stuck, it is
wise to regularly use the engine
brake.
The braking effect decreases as the engine
speed falls.
The most appropriate area of use for the
engine brake is in the blue area of the
revolution counter. The engine brake
delivers the highest braking effect in this
area.
When using the engine brake, adjust the
gear selection so that the engine speed
remains in the most favorable range. In
case of an AS Tronic Lite gearbox, gear
selection is automatic.
The engine brake is automatically switched
off when:
• The engine speed drops below
1000 rpm.
• The ABS/ASR system has
established a tendency for the
wheels to lock.
• The accelerator pedal is
depressed.
DRIVING - Park Brake and Service Brake
90 Y53-6078-1B1 (12/18/18)
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