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maintenance schedule is valid under
reasonable vehicle use and normal oper-
ating conditions.
Weekly Maintenance Work
• Check the steering chock.
• Check the fifth wheel pim.
• Check if the brake system is work-
ing properly.
• Check tire pressures.
• Check the wheel nuts tightness.
• Bleed the air from the tanks.
• Lubricate the vehicle (for vehicles
wit-hout a central lubrication
system).
• Check that grease reaches the
points lubricated by the central lubri-
cation system, that the system is
working correctly, and that the pump
tank is filled with grease (for ve-
hicles equipped with a centralized
lubrication system).
• Check the hydraulic oil level in the
tank.
• Check the antifreeze valve (if
present).
Monthly Maintenance Work
• The oil of the hydraulic system
should be changed after the first
one or two months of use of the
semi-trailer. The hydraulic oil, which
is changed after the first two months
of use, can be reused if carefully
filtered.
• Check the wear of the brake pads.
• Adjust the brakes.
• Check the alignment of the axles.
• Check the pressure values provided
by the braking control.
One Time in Three Months Mainte-
nance Work
• Clean the filter element of the Yellow
and Red coupling heads.
• Check the suspension system for
wear, oil leaks and damage.
• Check the camshaft clearance.
• Check for leaks in the brake system
(with the service brake active).
• Check for air leaks in the air
suspension.
• Check the air pillows for damage.
• Check for contamination on the roll-
er surface, clean if necessary.
• Check for wear, scratches and cor-
ro-sion on parabolic springs.
• Check tire wear.
One Time in Six Months Maintenance
Work
• Check the axles.
• Check the bearing clearances.
• Check the pneumatic system com-
po-nents.
• Check hydraulic system
components.
Annual Maintenance Work
• Check their suspension (gap
adjustment).
• Check the brake chambers.
• Change the hydraulic oil used in the
system once a year. (In cases
where contamination is observed at
earlier periods in hydraulic system
oil controls, a 1-year period for hy-
draulic oil change is should not
waited.)
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