Planning - Craftsman 139.53903DM Owner's Manual

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.
• Dependingon your door's construction, you may need
additional mounting hardware for the door bracket (Step 11).
Without a properly working safety reversal system, persons
(particularly small children) could be SERIOUSLYINJUREDor
KILLED by a closing garage door.
• The gap between the bottom of the garage door and the
floor MUST NOTexceed 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.
ONE-PIECE DOORWITHOUTTRACK
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 16.
t
Safety Reversing Sensor
Header Wall
Rail
Slack in chain tension
is normal when garage
door is closed.
Safety Reversing
Sensor
Gap between floor
and bottom of door must not exceed 1/4" (6 mm).
Wall-mounted
Door Control
Motor Unit
CLOSED POSITION
Trolley Slo p Bolt Ca,ble Tro.lley
Straight Curved
_._ Door Door-
_._ Arm Arm
Door _ _
Garage
Emergency
Release
Rope & Handle
ONE-PIECE DOORWITH TRACK
Safety
Reversing Sensor
Reversing
Gap between floor Sensor
and bottom of door
must not exceed 1/4" (6 mm).
CLOSED POSITION
Trolley Stop Bolt Cable
-- Header Curved
Bracket DoorArm_ / L.
_/_ Door°°°°°°l°°°°°)
Y_i_ Bracket Straight Door
Y//,,,!_ Garage Arm
:///I Door d:::
Chain
Rail
Emergency
Release
-- Rope &
Handle