SK599-AT5
Pneumatic system
Truck
9-6
SPIERINGS MOBILE CRANES USER MANUAL V 0.1
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9.6.
Checking brake pressure
9.6.1.
Pressure brake boosters
•
Brake boosters axles 1, 2 and 3: 8.5 bar;
•
Brake boosters axles 4 and 5: 7.5 bar.
The pressures can be adjusted by two pressure reducing valves, which are mounted in the control
lines.
Check the system pressure at a running engine. This can be done by connecting a calibrated air
pressure on one of the 60 litres air pressure reservoirs. These are mounted in the chassis under the
truck cab (see
1
) and between axle 3 and axle 4 (see
2
).
The system pressure must be 9.8 bar and can be adjusted by the pressure relief valve on the air dryer.
There are measurement connections mounted on the brake boosters of all axles.
9.7.
Hoses and connections pneumatic system
All hoses, connections, pneumatic valve blocks, filters, cylinders and compressed air reservoirs must
be checked regularly for leakage and damage.
In case of leakage and/or damage, replace the component as soon as possible to prevent major
damage.
CHECK / TEST!
Check the brake pressure of all axles during the annual maintenance.
CHECK / TEST!
Check all components of the pneumatic system every 2 months for leakage and
damage.
Picture 9-7
1
2
