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8.2 BLEEDING OPERATION
If beam movement is incorrect, air must be bled from the
hydraulic system.
Procedure:
)
Make sure that the bleed screw was eliminated (Fig.9)
)
Activate the beam electrically:
- during opening, slightly loosen and re-screw the bleed
screw of the piston with the balancing spring (Fig. ref. )
- during closure, slightly loosen and re-screw the bleed screw
of the piston without the balancing spring (Fig. ref.).
)
If necessary, repeat the operation several times, until you
obtain correct beam movement.
9 REPAIRS
For any repairs, contact FAAC's authorised Repair Centres.
RH
1
2
3
Fig. 18
4
WHEN THE BARRIER IS OPEN, THE
SPRING MUST NOT BE
COMPRESSED
5
6
Fig. 19
8
10 CHANGING THE RH (LH) VERSION OF THE BARRIER INTO
THE LH (RH) VERSION
Procedure for converting an RH (LH) version barrier into an LH
(RH) version:
1.
Release the barrier as shown in Chap.6.
2.
Position the beam in opening position and remove it
from the pocket as shown in Fig. 10 or FIg.11.
3.
Re-lock the barrier as shown in Chap.7.
4.
Screw the bleed screw on the control unit (FIg.9).
5.
Fully loosen the spring adjustment ring-nut (Fig.19
ref.d).
6.
Detach the feed pipes (Fig.19 ref.c and f) from the
two pistons and plug the unions.
7.
Remove the two pistons (Fig. 19 ref. b and e) from the
upper and lower fittings and reverse their position, taking
the rocker (Fig.18 ref. ). against the opening travel limit
mechanical stop.
8.
Remove the pinion pocket and re-install it to set the
barrier at opening as in figure 19.
9.
Fit the feed pipes as shown in Fig. 19, according to the
configuration of the barrier (RH or LH).
10.
Reverse the travel limit connectors on the control unit.
11.
Remove the bleed screw (Fig.9) and carry out the air
bleed operations as indicated in paragraph 8.2.
12.
Check the balance of the spring as indicated in
paragraph 4.4.
4
5
6
LH
1
2
3
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