Craftsman 139.53920DM Owner's Manual page 32

CARE OF YOUR OPENER
LIMIT AND FORCEADJUSTMENTS:
Weather conditions may cause some
minor changes in door operation
requiring some re-adjustments,
particularly during the first year of
operation.
Pages27 and 28 refer to the limit
and force adjustments. Only a
screwdriver is required. Follow the
instructions carefully.
Repeat the safety reverse test
(AdjustmentStep3, page 29) after
any adjustmentof limits or force.
FORCECONTROLS
LIMIT CONTROLS
MAINTENANCE SCHEDULE
Oncea Month
• Manually operate door. If it is unbalancedor binding, call a
trained door systems technician.
• Checkto be sure door opens & closes fully. Adjust limits and/or
force if necessary. (See pages 27 and 28)
• Repeatthe safety reversetest. Make any necessary
adjustments. (SeeAdjustment Step 3)
Twice a Year
• Checkchain tension. Disconnect trolley first. Adjust if
necessary. (See page 11)
Oncea Year
• Oil door rollers, bearings and hinges. The opener does not
require additional lubrication. Do not greasethe door tracks.
THE REMOTECONTROLBATTERY
To prevent possible SERIOUSINJURYor DEATH:
• NEVERallow small children near batteries.
• If battery is swallowed, immediately notify doctor.
To reduce risk of fire, explosion or chemical burn:
• Replace ONLYwith 3V2032 coin batteries.
• DO NOT recharge,disassemble, heat above 100° C (212° F)
or incinerate.
The lithium battery should produce power for up
to 5 years.
To replacebattery, usethe visor clip
or screwdriver blade to pry open the
case as shown. Insert battery positive
side up (+).
Dispose of old battery properly.
Replacethe battery with only 3V2032 coin cell batteries.
NOTICE: To comply with FCC and or Industry Canadarules (IC), adjustment or modifications of this
receiver and/or transmitter are prohibited, except for changing the code setting or replacing the
battery.THEREARE NOOTHERUSERSERVICEABLE PARTS.
Tested to Comply with FCC Standards FORHOME OR OFFICEUSE. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2) this device
must acceptany interference received,including interferencethat may causeundesired operation.
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