I have a makita hr4011c rotary hammer drill, was working perfect then stopped, plugged into transformer but green light has come on on the drill but no action from the drill,

The motor is bad from overheating. Have motor rebuilt or replaced.

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The big control levers off, but the small one only comes off once you have removed the screw and have it in the down position.

possible broken spindle or gear in the gear case

If the smoke came from the main housing it sounds like the motor, take it to a service agent. It's a good machine.

go to makitausa.com and you can download a parts schematic there, let me k now if you need more assistance.

This is an older, discontinued model Makita that only works as a hammer drill. It does not have the dial selector the newer models have to switch from 'drill' to 'hammer drill' to just 'hammer'. If you need, there's a parts breakdown and user manual available at:

http://www.makitatools.com/en-us/Modules/Tools/ToolSupport.aspx?ID=352

Try to make a direct JUMPER.Take an old electrical cord cable and plug it in the electric socket and the other end of the cord with 2 cables already peel off and jump the + and - to the + / - of the hammer and see if power on if so the on/off switch is bad and need to replace.If the problem
persist probably the motor is burn.

If you need more help come back.Post / thumbs / testimonial are welcome!

green light up : all electrical contacts are ok
red light on : time to replace carbon brushes ant if possible bring back for maintenance kit

Exchanged Makita HP1640 hammer drill for a new one. The 2nd drill did the same thing in under an hour!! Will return for refund. Instructions say the Forward/Reverse switch must be in a full up or down position for the Hammer/Rotary switch to move; well, it is and the Hammer/Rotary switch still stops at a 1/2 way point between modes. Although I can still use the drill, instruction warnings say not to because it may potentially burn out the motor. I'll have to go with a different brand this 3rd time around. It seems to be a design flaw.

you need to get that service,
the grease causes the hammering.
and probably too much pressure was applied
to it.