Just a thanks to the person who sent me the information I required. It was correct and I have now changed the chuck!!
John Hendry
July 2009
dont know about workx but usual is to open chuck fully lookinto and remove screw from bottom with phillips screwdriver need a vice. note screw is a reverse tread so turn to the right. next place chuck in vice and use a 17 spanner between chuck and drill housing to unscrew chuck itself should just screw off new chuck should come wit screw and chuck key
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Try fixfault.com to fix drills.