---
title: What do I need to know about a 2740B Lock?
description: Instructions and Videos for the 2740B.
---

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1. [Help Center](https://resources.sargentandgreenleaf.com/migration/knowledge?hsLang=en)
2. [2740B](https://resources.sargentandgreenleaf.com/migration/knowledge/2740b?hsLang=en)

# What do I need to know about a 2740B Lock?

## Instructions and Videos for the 2740B.

Here are links to the written instructions:

**[2740B\_Quick\_Ref](https://resources.sargentandgreenleaf.com/hubfs/Technical%20Support/Electronic/2740/2740B_quick_ref.pdf?hsLang=en)**

**[2740B\_Full\_Operation](https://resources.sargentandgreenleaf.com/hubfs/Technical%20Support/Electronic/2740/2740B_operation.pdf?hsLang=en)**

When you know you have the correct combination but the lock will not open, try calibrating the lock.

**List of S&G 2740B Videos: Length YouTube Link**

1.) 2740B Features (S&G version): [http://youtu.be/fpBNCVgxxQI](http://youtu.be/fpBNCVgxxQI)

2.) 2740B Feature (Stanley S&G): [http://youtu.be/GWboBscut94](http://youtu.be/GWboBscut94)

3.) 2740B Install (Calibrate, Dial, Battery): [http://youtu.be/-Hfel0-YqbY](http://youtu.be/-Hfel0-YqbY)

4.) 2740B Calibration: [http://youtu.be/xgdwtn4n9Ts](http://youtu.be/xgdwtn4n9Ts)

5.) 2740B Dialing Factory Combo: [http://youtu.be/K\_h9e0V2B1M](http://youtu.be/K_h9e0V2B1M)

6.) 2740B Combo Change (Single): [http://youtu.be/cQMwjVE8nUk](http://youtu.be/cQMwjVE8nUk)

7.) 2740B Penalty Time: [http://youtu.be/Kh8nARTBfOw](http://youtu.be/Kh8nARTBfOw)

8.) 2740B Combo Change (Dual): [http://youtu.be/jSP2wFKXLZ8](http://youtu.be/jSP2wFKXLZ8)

9.) 2740B Recover Lost Combo: [http://youtu.be/YV-GsZrKCso](http://youtu.be/YV-GsZrKCso)

Always remove the change key before closing the door. If you close the door with the change key still in, you must complete the combination change process again to get the door open to remove the key. 

 

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