Can I get a drawing of the parts of the drill uh 650?

You need to contact a Hilti dealer either in person or online.

There are a couple of differant versions of the 650. Open up your chuck as wide as you can. Like you were putting a big bit in it. Look inside to see if you see a screw head. It might be slotted or torx. It will be left handed threads which means you will turn clockwise to remove. Once that screw is out you lock the front of the chuck in a vise and right behind the chuck will be a place to put a thin wrench. Turn the wrench in a counter clockwise motion away from the chuck.

Go to Hilti's website and choose your country. You can find locations and parts. The TE2s was not introduced until the early 2000's. In 1981 a drill that size would have been a TE12s. If that is your model parts are no longer available through Hilti.

http://app.xtremelocator.com/custom/hilti/SearchForm.php

Well, I would follow this link and put in your zip code. Call the service center that is closest to you, and see if they have the parts that you need. I do know that the TE 22 is discontinued, but there may still be some parts on the shelf.

Here is a link to the breakdowns. You will have to select > and then >
http://www.us.hilti.com/holus/page/module/home/browse_main.jsf?lang=en&nodeId=-114925

As my knowledge drills not use oil just grease in the bearings.But if you need to service and the drill is not too old and the repair is not cost too much you can find parts at Hilti Online or by your self using the Hilti Manuals.

Go to the drug store baby dept, they have squeeze bottles, same thing. Check it out.

to my knowledge you can't buy hilti parts. they want you to send it to a service center. i work in a tool repair shop and we can't get parts. i would go to a shop that repairs tools and have a number of brushes and try to find one that will match up.

the switch area where you change directions may have come loose and is in a nuetral position. when you take the cover off go slow and take your time.

to my knowledge you have to send it to a hilti service center. you can't buy parts nor can a local shop buy parts for them. you may just have a loose wire or the switch you move to change direction may have come loose inside.

while holding the drill like a gun, hold the lock button REALLY tight and pull the black part to the right really hard. this will unlock the chuck and if you keep twisting the black part to the right it will loosen it enough so that you can remove it