9
Notes on Rack Installation
Fig. 17
Fig. 15
Fig. 16
16
inch
• Make sure that, during gate travel, no rack elements derail
from the pinion.
• Do not, for any reason, weld the rack elements either to the
spacers or to each other.
• When the rack has been installed, to ensure that it meshes
correctly with the pinion, lower the gearmotor position by
The operators for chain and idle transmissions require the instal-
lation of a Z16 or Z20 chain pinion.
4.5.1. MODEL 844 ER CAT (Figs. 18 & 19)
1. Insert the pin on the shaft, using a hammer.
2. Fit the chain pinion on the shaft, making the channel coin-
cide with the pin. Tighten the screw and the appropriate
washers.
Fig. 19
Fig. 18
about 1/16 inch (Fig. 17).
• Manually check that the
gate regularly reaches
the mechanical stop li-
mits and make sure there
is no friction during gate
travel.
• Do not use grease or other
lubricants between rack
and pinion.
4.5. INSTALLATION OF CHAIN PINIONS
3. Insert the pin g on the shaft, using a hammer.
4. Fit the idle transmissions bracket on the operator flange,
using the four screws a (M5 x 12) and the appropriate wa-
shers b, in the kit as shown in Fig. 20.
5. Fit the chain pinion on the shaft, making the channel coinci-
de with the pin and tighten the screw d and the appropriate
washers e and f.
6. Pass the chain as shown in Fig. 21A and install the cover
with screw a and washer c as in Fig. 20.
4.5.2. MODEL 844 ER RF (Figs. 20 & 21)
In case of operators with magnetic limit switches, you have to
provide a bracket to mount them on the gate, following the
proper distances shown in Fig. 21B.
4.5.3. LIMIT SWITCHES
c
d
g
f
e
b
a
a
Fig. 20
Fig. 21A
Fig. 21B
0 to ⅜
⅛ to ½
- Measurements in Inches
6. Place another rack ele-
ment next to the pre-
vious one, use a third
piece of rack (as shown
in Fig. 16) to synchronize
the teeth of the first two
elements.
7. Move the gate ma-
nually and secure the
first element. Proceed
as previously described
until the gate is fully
covered.
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