Craftsman 139.18489DS Manuel D'instructions page 5

Planning (Continued)
ONE-PIECE DOOR INSTALLATIONS
• Generally, a one-piece door does not require reinforcement.
If your door is lightweight, refer to the information relating to
sectional doors in Installation Step 11.
• Depending on your door's construction, you may need
additional mounting hardware for the door bracket (Step 11).
ONE-PIECE DOOR WITHOUT TRACK
Header Wall
Safety Reversing
Sensor
ONE-PIECE DOOR WITH TRACK
Safety
Reversing Sensor
Rail
Access
Door
Safety Reversing
Sensor
Gap between floor
and bottom of door must
not exceed 1/4" (6 mm).
Safety
Gap between floor
Reversing Sensor
and bottom of door
must not exceed
1/4" (6 mm).
Without a properly working safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
• The gap between the bottom of the garage door and the floor
MUST NOT exceed 1/4" (6 mm). Otherwise, the safety
reversal system may NOT work properly.
• The floor or the garage door MUST be repaired to eliminate
the gap.
Motor Unit
Wall-Mounted
Door Control
Header
Wall
Access
Door
Header
Wall
5
CLOSED POSITION
Rail Tab
Belt
Header
Rail
Bracket
Door Bracket
Straight
Door Arm
Garage Door
CLOSED POSITION
Belt Trolley
Rail Tab
Curved
Header
Door Arm
Bracket
Door
Bracket Straight
Door
Garage
Arm
Door
Trolley
Emergency
Release
Rope & Handle
Curved
Door
Arm
Rail
Emergency
Release
Rope &
Handle