When I was done using the hammer drill to drilling

If nothing's broken, you can usually apply and hold pressure in the direction you want to the switch or ring, depending on which model you have, and lightly press the trigger to get it to move.

Brushes to the motor could be the cause or heat sensor in the battery pack it switches off or even bad connections on motor check the spades connections could be loose

they don't sell the fan separately. the armature number is 16-01-3015. if you give me your general location I will try and find a dealer close to you.

Yup, that is what happens. You can lessen that by really cranking it down, but it is an issue with most hand tightened chucks, and does not indicate a mechanical failure. I sometimes miss my old, heavy Milwaukee wrist-breaker with the keyed chuck. If it is just too much to live with, you could get a drill with the click in hex chuck or put a Jacobs keyed chuck on your hammer drill.
Anyway, I hear where you are coming from and share your frustration.
Regards, Farmerbear

Hi,
Grab the side or around the chuck and run the drill in reverse to loosen the chuck...

heatman101

If there wasn't a burnt smell signaling burning out the drill then you should be able to just recharge the battery

there should be a slider type switch on top of the drill. and there will be a picture of a hammer, and a picture of a drill. slide accross to the drill picture for drill, and hammer for the hammer drill

Do the same in reverse, if possible. Also, you could use two channel locks as most of those chucks have two rings, the narrow one towards the drill itself being attached to the motor. However, make sure the screw inside the chuck is tight first -- I've seen those back out and block chucks open.

You can have this rebuilt at any milwaukee service center for about 50 bucks, half the price of a new one.

There are a few features you may want to pay attention to include: A Depth Rod mounted to the drill lets you know when the bit reaches the desired depth; Variable Speed Selection allows you to adjust the drill for specific jobs. Use high speed for small holes and low speed for large holes; Reverse can retrieve a hopelessly stuck bit; Removable Side Handles give the operator better control in normal use, and can be removed in confined spaces.