My Bosch PHS66G hedge trimmer has provided valiant service for quite a few years . . . until today.
I was using it this morning, and it suddenly stopped. I checked all the usual stuff - fuse, power breaker, cord continuity, etc. - all ok. I then found that I could get the motor to run spasmodically if I shook it. I subsequently found that it would run if I held it upside down, but would stop as soon as I turned it the right way up.
Later in the day, I took it to bits, but couldn't see anything untoward. The brushes appear to have plenty of spring-loaded travel beyond what is required to contact the commutator. There is no end-play in the armature. The commutator was a bit dirty, so I cleaned it with some fine wet & dry and then a dab of white spirit - and hoped all would be well when I re-assembled it. But no - exactly the same.
Any ideas?