In message ,
Tricky Dicky writes
Our Siemens (also made by Bosch) did the same replacing the brushes
fixed it. If you have a badly scored commutator you may find you go
through brushes rapidly but for the the price they are and the 20 mins
to fix it is worth a punt.

Bosch set (30ukp) on order. I'll give the comm. a tidy up before
re-fitting.

Ta.

--
Tim Lamb