Set The Tension; Important Installation Instructions - Craftsman 139.53915D Manual Del Propietário

ASSEMBLY STEP 5
Set the Tension
• Insert a screwdriver tip into one of the nut ring slots and
brace it firmly against the trolley.
• Place a 7/16" open end wrench on the square end.
Rotate the nut about 1/4 turn until the spring releases
and snaps the nut ring against the trolley.
This sets the spring to optimum belt tension.
You have now finished assembling your garage door
opener. Please read the following warnings before
proceeding to the installation section.
Square
End
Trolley
Slot
uare End
Nut Rin(
INSTALLATION
IMPORTANT INSTALLATION INSTRUCTIONS
To reduce the risk of SEVERE INJURY or DEATH:
1. READAND FOLLOWALL INSTALLATION WARNINGSAND
INSTRUCTIONS.
2. Install garage door opener ONLYon properly balanced and
lubricated garage door. An improperly balanceddoor may not
reverse when required and could result in SEVEREINJURYor
DEATH.
3. ALL repairs to cables, spring assemblies and other hardware
MUST be made by a trained door systems technician BEFORE
installing opener.
4. Disable ALL locks and remove ALL ropes connected to
garage door BEFORE installing opener to avoid entanglement.
5. Install garage door opener 7 feet (2.13 m) or more above
floor.
6. Mount emergency releasehandle 6 feet (1.83 m) above floor.
7. NEVERconnect garage door opener to power source until
instructed to do so.
8. NEVER wear watches, rings or loose clothing while
installing or servicing opener.They could be caught in
garage door or opener mechanisms.
9. Install wall-mounted garage door control:
• within sight of the garage door.
• out of reach of children at minimum height of 5 feet
(1.5 m).
• away from ALL moving parts of the door.
10. Placeentrapment warning label on wall next to garage door
control.
11. Placemanual release/safety reversetest label in plain view
on inside of garage door.
12. Upon completion of installation, test safety reversal system.
Door MUST reverse on contact with a 1-1/2" (3.8 cm) high
object (or a 2x4 laid flat) on the floor.
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