CAB SUBWAY SB.25 AC Mode D'emploi page 14

Make sure that the thrust applied to the gate leaf is
compliant with provisions set out by regulations in
force.
ADJUSTMENT OF BRAKING
All the models are provided with braking adjustment in both
opening and closing phases for a slower movement of the
gate leaf in the final phase of operation.
Fig. 19 shows the gate leaf performance, assuming, for
simplicity purposes, that the total thrust available (100°)
is used:
- During the opening phase, the gate leaf starts the opera-
tion at full speed and, after reaching 80° opening, it starts
braking and continues for other 20°.
- During closure, the gate leaf starts operation at full speed
and, with 10° advance with respect to the mechanic stop,
it starts braking.
Adjustments are carried out by means of two special regu-
lation screws protected by two caps T (Fig.20).
By using a 3mm Allen key:
- Loosen the screw to increase braking.
- Fix the screw to reduce braking.
- According to the motor position (SX-Left/DX-Right) the
opening and closing adjustment screws are inverted.
Fig.19 shows the differences between two positions.
By loosening the valve to the maximum, braking is deacti-
vated.
Never exercise force on the adjustment valve.
TOPPING UP/REPLACEMENT OF OIL
All oil-hydraulic operators require a periodic review of the
oil level.
To top up oil, after cutting off the mains power supply, un-
screw the cap shown in Fig.20.
At the bottom of the housing of screw V (Fig.20), the oil level
should be seen, as shown in section L. If the oil level cannot
be seen, a topping up is required.
Use original BIO OIL only.
Check the good conditions of the gasket G. If it is worn or
damaged, replace it.
AIR BLEED SCREWS
Two air bleed screws (Fig.1 rif-3) allow for air bleeding from
the operator pistons.
The operator is supplied without air in the hydraulic circuit,
therefore, no intervention is usually required.
However, in the event of extraordinary maintenance op-
erations (total de-assembly and assembly of the operator),
bleeding should be carried out.
For practical reasons, we advise to bleed air before reinstall-
ing the operator, by temporarily connecting to the control
unit:
- Send an opening control, until the jack is against the limit
switches and, with motor on, open the air bleed screw *.
- Bleed air until not emulsioned oil appears.
- Fix the air bleed screw.
- Carry out the same procedure for the closing phase.
- Perform this operation more than once, for both air bleed
screws.
- Check oil level, if required top up with oil.
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* To find the opening and closing air bleed screws for the
right and left versions, refer to Fig.21:
if the rotation direction is the one indicated by arrow A, the air
bleed screw which must be used is screw A, and viceversa,
if the rotation direction is indicated by arrow B, the air bleed
screw which must be used is screw B.