Craftsman 1/2 HP GARAGE DOOR OPENER 139.53978SRT - Manual (Page 31)

IMPORTANT SAFETY INSTRUCTIONS
To reduce the risk of severe injury or death to persons:
1. READ AND FOLLOW ALL INSTRUCTIONS.
2. Do not permit children either to operate or to
play with the opener. Keep remote control in a
location inaccessible to children.
3. Operate opener only when the door is in full
view and free from any obstruction. Keep the
door in sight until it is completely closed. NO
ONE SHOULD CROSS THE PATH OF THE
MOVING DOOR.
4. Check safety reversal system monthly. See
page 30. The garage door A/i/STreverse on
contact with a one-inch (or a 2x4 board laid
flat) object placed on the floor. If an adjustment
is made to either the force or the limit of travel,
both adjustments may be needed and the
safety reversal system must be checked.
Failure to properly adjust the opener may
result in severe injury or death.
5. If possible, use the emergency release only
when the door is in a closed position. Caution
should be taken whenever the disconnect cord
is actuated with the door open. Weak or broken
springs may cause the door to fall rapidly,
causing injury or death to persons.
6. KEEP GARAGE DOORS PROPERLY
BALANCED. See page 3. An improperly
balanced door may not reverse when required
and could result in severe injury or death.
Repairs to cables, spring assemblies and other
hardware must be made by a professional
garage door person.
7. Disconnect the electric power to the garage
door opener before making any repairs or
removing the covers.
8 .
SAVE THESE INSTRUCTIONS.
Care of Your Opener
Limit and force adjustment controls
Limit Controls Force
0
3-FUNCTION
Open this end
first to avoid
cracking
housing
Adjustment Label
(Located on the left side panei)
Adjustment Label
(Located on the right side panel)
Weather conditions may cause some minor
changes in door operation requiring some re­
adjustments, particularly during the first year of
operation.
Pages 28 and 29 refer to the limit and force
adjustments. Only a screwdriver is required. Follow
the instructions carefully.
Repeat the safety reverse test (page 30) after any
adjustment of limits or force.
The remote control
The lithium battery should
produce power for up to
5 years. To replace battery,
use the visor clip or screwdriver
blade to pry open the case, as
shown. (“Open” location is
stamped on back of transmitter case.) Insert battery
positive side down.
Replace cover as fotlovKS. 3-Function rem ote: Insert
the 3 tabs at the opposite end and snap shut.
Dispose of old batteries properly.
Keep batteries away from small children. If
swallowed, promptly notify doctor.
Maintenance Schedule
Once a Month
Manually operate door. If it is unbalanced or
binding, call for professional garage door service.
Check to be sure door opens & closes fully.
Adjust limits and/or force if necessary.
(See pages 28 and 29.)
Repeat the safety reverse test. Make any
necessary adjustments (See page 30).
Twice a Year
Check chain tension. Disconnect trolley first.
Adjust if necessary (See page 11).
Once a Year
Oil door rollers, bearings and hinges. The opener
does not require additional lubrication. Do not
grease the door tracks.
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