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turn the motor head, and take off the pulley cover. Slide the belt around the pulley ( draw.17).
Put the pulley cover on and fix it with the screws ( draw.18).
Insert the “U” rail into the plate through the guides until it stops ( draw.19-20)
NOW your garage door opener is full mounted and ready to be fixed to the door
Draw.19
Draw.18
Draw.20
Draw.21
rail
guides
guides
pulley
pulley cover
screw
4° step:
connect the belt to the pulley on the motor plate
Draw.17
Draw.17.a
screw
screw
pulley cover
