John deere 47 snowblower

[bke]

For some reason on my john deere 47 snowblower the big sprocket on blower keeps falling off. I tighten the two set screws but it still manages to fall off. Has anybody else had this problem. Any ideal how to keep it from falling off. I even put locite on the two set screws.

 

[mechanic mark]

inspect chain & sprocket teeth visually & by hand for wear, looks dry, lube or grease chain & sprocket. are set screws backing out due to vibration? inspect set screws for replacement.

 

[bke]

I ordered new a chain. Yes the set screws get loose from vibration