SK599-AT5
Driving
Truck
4-22
SPIERINGS MOBILE CRANES USER MANUAL V 0.1
D
ec
2
01
6
C
h
an
ges
an
d t
y
po
gr
ap
hi
c
al
er
ro
rs
res
er
v
ed.
©
20
1
6
S
pi
er
ings
M
obi
le
C
ran
es
–
A
ll
ri
ght
s
re
se
rve
d
.
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).
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!
Exceeding of the authorised engine speed may result in serious engine damage.
CAUTION!
Keep distance when using the engine brake during a downhill drive.
If the gear box switches, the effectiveness of the engine brake can temporarily be
reduced and the vehicle may speed up shortly.
