Craftsman 139.18405D Owner's Manual 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 12.
• Depending on your door's construction, you may need
additional mounting hardware for the door bracket (Step 12).
ONE-PIECE DOOR WITHOUT TRACK
Header Wall
Gap between floor
and bottom of door must
Safety Reversing
not exceed 1/4" (6 mm).
Sensor
ONE-PIECE DOOR WITH TRACK
Gap between floor
and bottom of door
must not exceed
Safety
1/4" (6 mm).
Reversing Sensor
Rail
Wall-Mounted
Door Control
Access
Door
Safety Reversing
Sensor
Header
Wall
Access
Door
Header
Wall
Safety
Reversing Sensor
5
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
fl oor MUST NOT exceed 1/4" (6 mm). Otherwise, the safety
reversal system may NOT work properly.
• The fl oor or the garage door MUST be repaired to eliminate
the gap.
Motor Unit
CLOSED POSITION
Rail Tab
Trolley
Belt
Header
Rail
Bracket
Door Bracket
Curved
Straight
Door
Door Arm
Arm
Garage Door
CLOSED POSITION
Belt Trolley
Rail Tab
Curved
Header
Bracket Door Arm
Door
Bracket
Straight
Door
Garage
Arm
Door
Emergency
Release
Rope & Handle
Rail
Emergency
Release
Rope &
Handle