DRIVER'S MANUAL SB220GS - Training Registration System

26. VOLT METER/RETARDER
TEMPERATURE GAUGE
Depending on the type of vehicle, a volt
meter or a temperature gauge for the retarder
can be put here.
VOLT METER (BATTERY CONDITION
METER)
With the engine stationary, the battery voltage
should be approx. 24 V. When the
engine is running, the volt meter pointer
should be between 24 V and 29.5 V.
If the voltage is lower than 24 V, the batteries
will not be charged sufficiently and this
problem must be remedied during the next
service inspection. If the voltage rises above
approx. 29.5 V, immediately switch on as
many power consumers as possible and
drive to the nearest repair shop.
RETARDER TEMPERATURE GAUGE
The oil temperature must be in the green
zone (80 to 110°C). If the temperature
gauge indicates a temperature of more than
150°C when the retarder is in use (retarder
warning lamp (A2) will also flash), the retarder
must be switched off. Also see
“DRIVING”.
If the oil temperature remains too high,
proceed as follows:
- Stop the vehicle
- Put the selector switch into neutral
- Allow the engine to run with a slightly
increased stationary speed. If, after a
few seconds, the temperature is still not
in the acceptable area, check the oil level
and the cooling system for faults.
27. AIR PRESSURE GAUGE
Each pointer indicates the pressure in the
reservoir of the service brake circuits (circuit
1 and 2). If the pressure in one of the
circuits drops below 5 bar, a buzzer goes
off and bulb B3 of the information panel will
light up. To release the parking brake; circuit
3 (parking brake) shall only begin to fill
when circuits 1 and 2 are completely filled
(6.5 bar). The parking brake can only be
released once circuit 3 is completely filled.
The warning lamp (13) will then be extinguished.
The buzzer only works with the
contact switched on; the pressure gauge
works at all times.
It is not permitted to drive the vehicle if the
pressure in one of the circuits is below 6,5
bar.
28. COOLANT TEMPERATURE GAUGE
The coolant operating temperature should
be between 75°C and 93°C (black zone).
Never run the engine at full load when the
coolant temperature is below 50°C (orange
zone). If a sudden rise in coolant temperature
is observed and/or the gauge reading
enters the red zone, then the following
should be checked:
- The coolant level; unscrew the filler cap
with caution!
- The V-belts and water hoses.
- The hydraulic operation of the engine
cooling fan.
INSTRUMENTS AND CONTROLS
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