17
ENGLISH
ENGLISH
4.4.3.
SCREW-ON NYLON RACK (Fig. 15bis)
1)
Move the leaf manually to the
closed position.
2)
Rest the first rack element level
on the pinion and mark the point to
be drilled on the gate. Drill a 4 mm
diameter hole and screw on the
6x20 mm self-tapping screw with
reinforcement plate.
3)
Move the gate manually making
sure that the rack rests on the pinion
and repeat the operations of point 2.
4)
Place another rack element
next to the first using a section of
rack to set the teeth of the two elements in phase as shown
in Fig. 17.
5) Move the gate manually and carry out the fixing operations
the same way as for the first element. Proceed in this
manner until the entire gate has been covered.
Notes on the installation of the rack
•
Check that none of the rack elements come off the pinion
during the movement of the gate.
•
Do not weld the rack elements either to the spacers or to
each other.
•
After installing the rack, lower the position of the gear
motor by adjusting the feet (Fig. 18) by about 1.5 mm to
ensure correct meshing with the pinion.
•
Check manually that the gate
reaches the mechanical travel lim-
its correctly and that it does not
encounter friction during its travel.
•
Do not use grease or other lubri-
cants between the pinion and the
rack.
4.5.
MOUNTING THE CHAIN PINIONS
In versions with chain and sprocket drive transmissions, mount
the Z16 or Z20 chain pinion. Proceed as follows:
4.5.1. MODEL 746 EMC CAT (Figs. 19 - 20)
- Insert the spring pin in the shaft with the aid of a hammer.
- Fit the chain pinion on the shaft, ensuring that the notch in the
pinion coincides with the spring pin, fit the screw and washers
and tighten.
4.5.2. MODEL 746 EMC RF (Figs. 21 - 22)
- Insert spring pin
g
in the shaft with the aid of a hammer.
- Fit the chain pinion on the shaft, ensuring that the notch on
the pinion coincides with the spring pin; fit screw
d
and
washers
e
and
f
and tighten.
- Fit the idle sprocket carrier plate on the gear motor flange,
removing the four upper bolts and replacing them with the
5x12 hex bolts
a
and washers
b
in the kit as shown in Fig. 21.
- Fit the chain as shown in Fig. 22 and fit the casing with screws
a
and washers
c
(Fig. 21).
Fig. 16
Fig. 17
Fig. 18
Fig. 20
Fig. 19
Fig. 22
Fig. 21
a
a
b
c
d
e
f
g
1.5
Fig. 15bis
