Craftsman 1/2 HP GARAGE DOOR OPENER 139.53978SRT - Manual (Page 39)

Index
Access Door/Outside Key Release Accessory...................................................................................................................4.5
Chain Tension................................................................................................................................................................. 4, 5,11
Electricai Safety Warnings...........................................................................................................................................2,20,31
Garage Door
Testing for balance, binding and sticking................................................................................................................3,28,31
Determining high point of travel:
Sectional door...................................................................................................................................................................12
One-piece door................................................................................................................................................................. 13
Disabling existing locks..................................................................................................................................................3,11
Door clearance brackets (for garages with low headroom)........................................................................................12,38
Force controls
Adjustment procedures...................................................................................................................................................... 4, 29
Problems that might require force adjustments...................................................................................................... 34,35
Safety warnings.................................................................................................................................................................29. 31
Door hardware....................................................................................................................................3, 9,11,12,18,31 i 32
Maintenance instruction label........................................................................................................................................11,28
Reinforcement requirements.................................................................................................................................................4, 24
Removing of ali ropes...................................................................................................................................................... 3,11
Possible door damage....................................................................................................................................................16,24
Travel limits
Adjustment procedures....................................................................................................................................................28
Problems that might require limit adjustments..............................................................................................................34. 35
Safety warnings.................................................................................................................................................................28, 31
Manual (Emergency) Release Rope & Handle
Lockout feature.................................................................................................................................................................... 32
Manual disconnect...............................................................................................................................................................32
Safety warnings................................................................................................................................................. 11,19,31, 32
Opener Terminals
Door control connections................................................................................................................................................... 18
Safety reversing sensor connections................................................................................................................................ 23
Operational Noise
Sprocket noise.....................................................................................................................................................................11
Vibration noise (isolator kit)............................................................................................................................................... 34
Receiver and Remote Control
Programming the receiver.................................................................................................................................................. 33
Erasing all codes................................................................................................................................................................. 33
Activating other openers.....................................................................................................................................................33
Safety warning..................................................................................................................................................................... 33
Problems with remote control operation...........................................................................................................................34
Safety Reverse Test Procedure............................................................................................................................................ 30
Testing required.................................................................................................................................................11, 30, 34. 35
Safety reverse system problems
Securing header bracket to wall..................................................................................................................................... 12
Adjusting travel limits...................................................................................................................................................... 28
Applying excessive force on the door............................................................................................................................29
Buckling or uneven floor................................................................................................................................................ 4,5
Safety Warnings.................................................................. 2, 3, 9, 11, 12. 16, 18, 19, 20, 21,24, 28, 29, 30. 31,32, 33
User Instruction Label for garage wall.......................................................................................................................... 1 1 , 1 8
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