Wiring diagram Black & Decker 7277 /2 Hammer Drill

SOURCE: I have the black and decker hammer drill model

look at the back of the brush holder for a tab that the forward/reverse lever locks into, it might be broken not allowing it to shift.

SOURCE: Can't remove the chuck on a drill.

There are one-way (non-reversible) and two-way (reversible) drills. Mine is one-way. Methods for chuck removal are different for these two types.
Procedure for one-way (non-reversible) drills:
Drills of this type have no chuck screw, so one have to hold the spindle with a wrench, than to sharply strike the wrench with a hammer to spin it off.
Procedure for two-way (reversible) drills:
Open the chuck up and in the bottom is a screw that holds the chuck on the shaft.The screw turns in a clock wise motion to be removed and then you can top the chuck off the shaft.

SOURCE: stopped working in mid drill. squeeze the trigger, nothing happens

It could be a dirty switch connection in the trigger assembly , it happens to me on my electric sanders all the time , just open it up and try blowing it out with an air compressor

SOURCE: When I was done using the hammer drill to drilling

open your chuck as far as it will go look down inside the chuck and you should see where it has come from ,if that is where it came from it will be right hand thread probably allen key or very small socket

SOURCE: Need wiring diagram for switch on Cat #5378-20 SN

Go to Milwaukeetool.com and under service/manuals you can type in your model number and download the wiring schematic for this tool. If I have helped you with your request would you please rate this response accordingly and thank you.

Testimonial: "Thank you for the info."