B&S #13 chuck removal

[wildcatter]

I am close to being able to fire up my grinder but want to clean the headstock first. It has a 4 jaw chuck on it now and I am wondering what the proper procedure is for removing the chuck. I don't see a spindle lock so how do I unscrew the chuck? None of the manuals I have been able to find say anything about it. Any help would be greatly appreciated!

 

[dep5]

Headstock has a spindle lock. The spindle thread is LH

 

[wildcatter]

Found the spindle lock. This machine was new to me so I was not familiar with it at all. Thanks for the reply!