Installation and Maintenance Instructions - ETO Doors

step four:
locating the torsion spring M,safety device for spring
break N and cable drums O on the spring shaft T as the
picture,the spring shaft T has to be straight and
level.
K
I
O
Z
T
Z:only locate the cable drum O
between the drum bracket Z above
the vertical track;tighten one
side of spring onto the drum
bracket as the picture
showed.This is the base for the
tension of the springs.
M
M
N(optional):install the safety
device for spring break N with
the torsion spring,this is the
base for the tension of the
winding spring please
check the step seven
below.
N T
8