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Craftsman
Garage Door Opener

Model # 139664056 Official Craftsman garage door opener

Here are the diagrams and repair parts for Official Craftsman 139664056 garage door opener, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 98 parts  |
Screw 171A183
#1

Chassis assembly diagram

Screw

Part #171A183

The manufacturer no longer makes this part, and there's no substitute part

Cable Pulley 144A12
#7

Rail assembly diagram

Cable pulley

Part #144A12

The manufacturer no longer makes this part, and there's no substitute part

Wire Harness 1B2448

#NI

All parts diagram

Wire harness

Part #1B2448

The manufacturer no longer makes this part, and there's no substitute part

Bearing Set 4A1421
#7

Chassis assembly diagram

Bearing set

Part #4A1421

The manufacturer no longer makes this part, and there's no substitute part

Pin STD560607
#1

Rail assembly diagram

Pin

Part #STD560607

The manufacturer no longer makes this part, and there's no substitute part

Shaft Spkt 4A1263
#44

Chassis assembly diagram

Shaft spkt

Part #4A1263

The manufacturer no longer makes this part, and there's no substitute part

Lock Nut STD541425
#19

Rail assembly diagram

Lock nut

Part #STD541425

The manufacturer no longer makes this part, and there's no substitute part

Transformer 4A1202
#15B

Chassis assembly diagram

Transformer

Part #4A1202

The manufacturer no longer makes this part, and there's no substitute part

Worm Gear 81B53
#20

Chassis assembly diagram

Worm gear

Part #81B53

The manufacturer no longer makes this part, and there's no substitute part

Start Capact 30B296
#17

Chassis assembly diagram

Start capact

Part #30B296

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your garage door openers

Choose a symptom to see related garage door opener repairs.

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Why doesn't my garage door opener work?

Main causes: faulty logic control board, bad RPM sensor, broken gears in the drive system, bad drive motor…

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Why does my garage door opener work intermittently?

Main causes: radio interference, weak remote batteries, sunlight interference with safety sensor beams, safety sensors n…

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What preventive maintenance does my garage door opener need?

Things to do: check garage door travel, tighten brackets and fasteners, test safety sensors, check travel limits and for…

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Why won't my garage door opener open the garage door?

Main causes: garage door locked, damaged garage door tracks, up-force setting needs adjustment, RPM sensor failure, bad …

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Why does my garage door opener open and close by itself?

Main causes: neighbor's remote programmed at the same time as yours, faulty wall control wiring, bad wall control unit…

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Why won't my garage door opener fully open or close the garage door?

Main causes: garage door opener misaligned, travel limits need adjustment, bad travel limit switches, faulty logic contr…

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Why does my garage door opener reverse on its own?

Main causes: safety sensor beams blocked, safety sensors not aligned, downforce setting needs adjustment, damaged garage…

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Why is my garage door opener noisy?

Main causes: loose fasteners, broken brackets, need preventive maintenance, worn drive gears, loose or worn belt, loose …

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Most common repair guides to help fix your garage door openers

These step-by-step repair guides will help you safely fix what’s broken on your garage door opener.

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How to replace a chain-drive garage door opener motor

How to replace a chain-drive garage door opener motor

Get your garage door moving again by replacing a defective motor in your garage door opener.…

Read more
Repair difficulty
Time required
 60 minutes or less
How to replace a belt-drive garage door opener motor

How to replace a belt-drive garage door opener motor

The garage door won't move if the motor is defective. Here’s how to fix it.…

Read more
Repair difficulty
Time required
 60 minutes or less
How to replace a garage door opener drive chain and cable assembly

How to replace a garage door opener drive chain and cable assembly

If your garage door won’t move, the chain and cable assembly on your garage door opener could be broken. Follow these st…

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Repair difficulty
Time required
 60 minutes or less

Effective articles & videos to help repair your garage door openers

Use the advice and tips in these articles and videos to get the most out of your garage door opener.

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

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How to open a garage door with an opener manually

How to open a garage door with an opener manually

Learn how to open a garage door manually if power to your garage door opener fails.…

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