Craftsman 139.53990DS 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 NOTexceed 1/4" (6 mm). Otherwise,
the safety reversal system may NOTwork properly.
• The floor or the garage door MUST be repaired to
eliminate the gap.
ONE-PIECE DOOR WITHOUT TRACK
FINISHED CEILING / \_,__
Support bracket & fastening _
hardware is required. '_ /_
See page 16. ._ _____
HeaderWall _i , . . X__
blaCK In cnaln tension Is _ I ....
_ormal when garage door Motor Unit
H scose
_--_1 I I wa,,-mounted
oorBontro,
IIN#I Rai, Tab Bab,e
If°i# I
It L_ I Hq a der
__ ._______ _ Bracket
Safety
Reversing
Gap between floor Sensor
Trolley
Safety and bottom of door must
Reversing not exceed 1/4" (6 mm).
Sensor
ONE-PIECE DOOR WiTH TRACK _
S - Hea_er_
Reversing
Gap between floor and Sensor
Safety Reversing bottom of door must
Sensor not exceed 1/4" (6 mm).
ight Cuwed
Door Door
Arm Arm
Garage Door
Emergency
Release
Rope & Handle
CLOSED POSiTiON
Rail Tab Cable
Uoo ed'
oooooopooooLJ
_Door /
. .. Straight Door
i:iracKet Arm
///i'AL- Garage
///A Door ,1
Chain
Emergency
Release
--Rope &
Handle
-h