Operating instructions
– LBA4/6/7 – 2017 Version
71
18.6.3
LBA 7/7R/74
To reverse the direction of the LBA 7/7R/74, follow the procedure below:
A-
Put the barrier in closed position, then remove the boom and top cover
B-
Remove the Opening stop to be able to open the barrier beyond the stop and loosen the
counterbalance spring
C- Remove the quick link that connects the chain and the pinion, then dismantle the
counterbalance system
D- Put the barrier back in closed position, then dismantle the stop system
E-
Remove the 2 half-shells by unscrewing the 3 screws on either side
F-
Using a hub puller, pull off the 2 lobes
G- Remove the nut at the end of the shaft using a 36 mm spanner
H- Reverse the detection cam
I-
Reinstall the nut, then the lobes reversing their direction
J-
Reinstall the counterbalance unit by engaging the chain in the other hole of the upper steel
sheet
K-
Reinstall the stop support the other way round
L-
Physically reverse sensors no. 1-2 and 4
M- Reverse the two phases for the variable frequency drive
N- Readjust the stops and sensors (see para
graph “9.3 Adjustment of stops and sensors”)
B
C
D
E
F
G
H
I