Craftsman 139.53990 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 11.
• Depending on 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 NOT exceed 1/4" (6 ram). Otherwise,
the safety reversal system may not work properly.
• The floor or the garage door MUST be repaired to
eliminate the gap.
ONE-PIECE DOOR WITHOUT TRACK
Header Wall
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 17
Rail
Slack in chain tension
is normal when garage
door is closed
Motor Unit
Access
Door
©
f
Safety Reversing Sensor
Safety Reversing
Gap between floor Sensor
and bottom of door must not exceed 1/4" (6 ram)
ONE-PIECE DOOR WITH TRACK
Wail-mounted
Door Control
_/_ CLOSED POSITION
Trolley Stop Bolt Cable Trolley
I
Bracket Rail
Door Bracket
Emergency
Release traight Curved Rope & Handle
Door Door
leader Arm Arm
Access I
Door I
f_
Reversing
Gap between floor Sensor
_- and bottom of door
Safety must not exceed 1/4" (6 mm)
Reversing Sensor
CLOSED POSITION
Trolley Stop Bolt Cable Chain
Header Curved _ mR_i_ld
Bracket Door Ar Rad
ooooooooo©o)
I E enoy
_i "hOOrOOr _ ii_!e
Bracket Straight e ease
Door _ht Rope &
Garage Arm Handle
5