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Home > Help Center > Storefront Door Information > Storefront Door Concealed Closer Information and Resources > How To Determine Which Storefront Concealed Closer Slide Arm, Track, Or Slide Block You Need

How To Determine Which Storefront Concealed Closer Slide Arm, Track, Or Slide Block You Need

A Step By Step Guide On How To Know Which Slide Block, Arm , or Channel Needed For Your Storefront Overhead Concealed Closer

In this guide we explain how to determine which slide block, offset arm, or channel you need to replace your existing offset arm assembly.

For New Installations

Depending on the depth of the top rail web, will determine which type of offset slide arm with track and block to use. If this is a new installation, then determine this by measuring the depth of the top rail web. For top rail depths of 9/16" then the Liberty JO arm will be used. For top rail depths of 7/8" the Liberty door closers VO arm will be used. For new installations refer to the manufacturer's provided template to place the arm in the correct location on the top rail of the door.

For Replacing An Existing Arm

Compare Slide Block Shape

The easiest way to determine which arm type you need is by looking at the slide block. The below illustration shows a JO and VO slide block. They both have a very distinct shape.



Compare Channel and Offset Arm Dimensions

If the slide blocks are too worn down, to where identification is not feasible, you can also determine which offset slide arm is needed by comparing the slide arm and track measurements. The illustration below shows the differences in measurements.



Conclusion

Now you can determine which type of slide block you need, or offset slide arm kit. We recommend using Liberty door closer slide blocks and offset arm assemblies. These products are the highest quality and last. The slide blocks are manufactured from a long wearing material. Liberty concealed closers and parts are trusted by business owners across the nation. Shop today and receive FAST, FREE shipping!








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