SK375-AT3
Driving
Truck
SPIERINGS MOBILE CRANES USER MANUAL V 0.0
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4.8.2.1.
Parking brake as an emergency brake
If the air pressure for the service brake is too low, the parking brake can be used to slow down the
moving vehicle.
Move the parking brake lever dosed backwards:
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Once the parking brake has been operated, this brake cannot be released till the air pressure is
restored again.
4.8.3.
Engine brake
Using the engine brake is especially useful at prolonged braking, for instance at high speed on a flat
road or at downhill driving. As a result, the wear of the service brake will be reduced.
By pressing the foot switch on the floor of the truck cab, the engine brake is activated.
The engine brake shuts off the fuel supply. Also the exhaust will be closed by means of a valve.
The biggest braking performance will be in the range of 1,500 up to 2,100 rpm.
The braking effect decreases as the engine speed drops.
As long as the foot switch is pressed, the engine brake is performing except in the following situations.
The engine brake is automatically turned off if:
The engine speed drops below 800 rpm or at a vehicle speed lower than 3 kph (1.9 mph);
The
anti blocking system
will come into effect.
While operating the engine brake, the brake lights are not illuminating.
It is not possible to disable the engine by means of the engine brake.
CAUTION!
Move the parking brake lever dosed backwards when used while driving.
CAUTION!
Exceeding of the authorised engine speed may result in serious engine damage.
CAUTION!
When operating the engine brake only, the anti blocking system is not able to
intervent if the wheels are blocking.
CAUTION!
Keep distance when using the engine brake during a downhill drive.
If the gearbox switches, the effectiveness of the engine brake can temporarily be
reduced and the vehicle may speed up shortly.
