Craftsman 139.18057 Owner's Manual

AccessDoorSafetyReversing SensorSafetyReversingSensorGap between floorand bottom of doormust not exceed 1/4" (6 mm)DoorBracket StraightDoorArmGarageDoorCLOSED POSITIONHeaderBracketCurvedDoor ArmChainEmergencyReleaseRope &HandleCableRailTrolley Stop BoltHeaderWallSafetyReversing SensorAccessDoorFINISHED CEILINGSupport bracket& fasteninghardware is required.See page 17.Safety ReversingSensorHeader WallGap between floorand bottom of doormust not exceed 1/4" (6 mm).Wall-mountedDoor ControlRailMotor UnitSlack in chain tensionis normal whengarage door is closed5Planning (continued)ONE-PIECE DOOR INSTALLATIONS• Generally, a one-piece door does not requirereinforcement. If your door is lightweight, refer tothe information relating to sectional doors inInstallation Step 11.• Depending on your door’s construction, you mayneed additional mounting hardware for the doorbracket (Step 11).ONE-PIECE DOOR WITHOUT TRACKONE-PIECE DOOR WITH TRACKWithout a properly working safety reversal system,persons (particularly small children) could beSERIOUSLY INJURED or KILLED by a closing garagedoor.• The gap between the bottom of the garage door andthe 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 toeliminate the gap.HeaderBracketTrolleyStraightDoorArmEmergencyReleaseRope & HandleDoor BracketCurvedDoorArmHeaderWallCableRailGarage DoorTrolley Stop BoltCLOSED POSITIONWARNINGCAUTION