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8 - MAINTENANCE
The automation systems for ALTK road barriers are designed and manu-
factured to high quality standards. However, like any other machine, re-
gular maintenance is required to ensure safety and maximise durability.
System maintenance must be carried out by qualified technicians,
in full compliance with the safety standards required by current
laws.
Before carrying out maintenance disconnect any electrical power
8.1 - Maintenance schedule
We recommend to carry out a general ALTK automation system check
every 6 months or every 50,000 opening/closing cycles. In the case of
systems submitted to intensive use, the frequency of inspections should
be doubled.
Please note the following points, which should be intended as a general
guide to the operations to be performed at regular intervals in order to
keep the automation system efficient, safe and in good operating con-
ditions:
1. Perform a general external inspection of the automation system,
checking the state of wear of the materials, paying particular attention
to signs of corrosion and/or cracks in the outer casing.
2. Check for bar integrity, making sure that there are no deformations
and/or cracks, particularly in the area where the bar is attached to
the barrier support plate. Check the integrity of the "omega" shaped
bar-holding bracket and the tightening of the bracket fixing screws to
the plate connected to the output shaft. Make sure that there is no
clearance such as to affect safety.
3. Check the integrity and efficiency of the PROFT rubber shock
protection profile with respect to the bar. A rubber profile partially da-
maged or cracked, or not adequately fixed, will not effectively ensure
shock protection, affecting the safety of the automation system.
4. In versions of bars formed by segments joined together by a joint,
check for perfect fastening and alignment of the two segments. You
may want to adjust the expansion bolts of the joint to restore the cor-
rect interference and alignment. If, despite the adjustment, it is no
longer possible to return the bar to its optimal condition, replace it
altogether (kits ASTL4J, ASTL6J, ASTL8).
5. After removing the door of the barrier body, carry out a general
internal inspection of the system, checking the state of wear/damage
of all the materials making up the automation system, paying particu-
lar attention to corrosion and/or cracks in the structural parts: replace
any components showing signs of wear.
6. Check the ground anchoring stability of the automation system;
check the tightness of the nuts of the anchoring clamps/tie-rods of the
base plate of the cabinet and the integrity of the perimeter welds of the
outer casing with respect to the plate.
7. Check that all screw-down connections are tight as required.
In particular, check:
- The tightening of the bolts and nuts securing the ball joint heads
of the top spring tensioners with respect to the balancing lever
- on ALT3/ALT6, the tightening of the top and bottom articulated
heads of the vertical hexagonal lever connecting the motor lever to
the balancing lever
- the tightening of the lock nuts of the top spring tensioner
articulated heads with respect to the threaded bars
- on ALT4, the tightening of the balancing lever fixing screw with
respect to the drive shaft
- on ALT3/ALT6, the tightening of the motor lever fixing screw with
respect to the drive shaft
- tightening of the gearmotor fixing screws to the cabinet
supply, including any backup batteries.
A few precautions and checks to be carried out at regular intervals will
ensure efficiency, longer working life and reliable operation of safety sy-
stems.
- on ALT3/ALT6, the tightening of the fixing screws of the support
flanges of the output shaft rear bearing
- ALT3/ALT6, the tightening of the fixing screws of the support
collars of the output shaft front bearing
8. On ALT6, check the tightening of the countersunk screw fixing the
bar support plate to the square shaft (Fig. 14)
9. On ALT3/ALT6 check the articulated heads of the connecting rod
M12 and of the tensioners M10, making sure that they are not worn
and that there is no slack in their movement. If this is the case, re-
place them
10. Lubricate the articulated heads of the spring tensioners and the
vertical hex lever with fluid oil or spray grease.
11. Check the integrity and adjustment of the bar end stops (see
paragraph 5.4 "Bar angle adjustment"). If the screws are worn and/or
deformed, replace them with hex head screws M10x35.
12. With the bar in the closed position, check that the pitch between
the turns of the balancing spring(s) is regular and constant, without
any deformation suggestive of yield stress. If this is the case, replace
the spring(s) (see also paragraph 9.2 "Replacement schedule").
13. Remove the plastic cover of the control unit box and check that t
here are no signs of overheating/burning of the connecting cables,
connectors and electronic components making up the board.
14. Check the function of the unlocking system: with the bar in a
closed position, manually release the gearmotor (see paragraph 5.3
"Bar unlocking") checking that this is done easily. When the bar is
released, check that it is easy to shift it by hand between its open
and closed positions, without experiencing any jamming. Check that
the strength required to move the bar during opening, measured per-
pendicularly to the bar and 1 m from the axis of rotation, does not
exceed 220 N (about 22 kg).
15. When the bar is released, check that it is correctly balanced at
45°, adjusting the tension of the spring(s) if necessary by loosening
the lock nut and working the tensioner (see paragraph 5.10 "Bar
balancing"). After completing the balancing operations, re-tighten the
lock nut to prevent unintentional loosening of the tensioner.
16. After locking the bar again, using the control devices (control
button, transmitter, selectors, etc.), carry out tests for opening, clo-
sing and stopping the bar, making sure that the movement matches
the expectations. Check that the angle of the bar is correct, adjusting
the bar end stops if required (see paragraph 5.4 "Adjustment of the
bar angle") and, if necessary, carry out the self-learning procedure
for the travel and main operating parameter values once again (see
paragraph 6.6 "Travel self-learning").
17. Check, one by one, all the safety devices present in the system
(photocells, sensitive edges, emergency buttons, etc.) to ensure
their efficiency. Make sure that the photocells are securely fixed to
their supports and check the integrity of the lids/lenses. Thoroughly
clean their front surface (do not use solvents).
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