How to replace chuck on a Bosch 1199VSR

[ticurse]

My chuck don't want to open completely. I've noticed that a new chunk would cost around 35$. Is it easy to install, what are the steps... Thanks alot

[cmoorejack]

Hey ticurse,
It doesn't look like your model # has a reverse screw to remove or a flat side on the spindle shaft to apply a wrench..so try this...make sure it is in low gear..[to provide the most resistance] lock the largest allen wrench [or chuck key] that will fit in the jaws..lay the drill flat on its side with the allen wrench turned up slightly and hit the allen with a sharp blow with a hammer [you may have to strike more than once]...
most repair shops also use an impact method
here is a video link that may also help..
YouTube - How to Remove a Drill Chuck
cmoorejack