how do i replace carbon brushes on bosch?

Brushes can be replaced with motor in situ, but it is easier removed.
Disconnect machine from electricity. take off back egg shape panel to get to belt (one screw) note where belt is positioned on motor spindle. slide belt off of drum puley and then off of the motor. tilt machine over to one side a little to get at the underneath. gently snip the cable tie holding the wiring loom and plastic sheild to the motor. carefully pull out the connecting plug from the rear of teh motor.
there are two 10m bolt head screws holding the motor onto the drum casing at the front of the motor.carefully undo and do not force.
The motor is very heavy....get soemone ot hold the machine for you. and ease the motor towards the back of teh maching and off of the 4 lugs holding it in place.

the brushes are easily seen. carefully pull off the wire connector and slip the little metal top of teh brush and spring out of its position to allow the sprng and brush remnants to come out of the brush carrier.
note the direction of the chamfer at the end of the carbon brush, as the new ones have to go back in the same way, as the brush carriers are offset to the commutator.
slide the new carbon in and geltly comprss the spring into place and slip the little metal to into position and connect the wire connector. (if you have used a patent part the metal top may be a little loose, so very carefuly bend the top of teh carrier a little to hold firmly in place).

make sure all the 4 bushes are in place on the motor before sliding it back onto the mounting lugs, get the front or the motor 2 lugs located first of all. do not force (a little dab of washing up liquid will help it slide on.) refit the 2 10mm bolt top screws...do not over tighten as it will strip the plastic.
refit the conectro for the wring loom. and with a new cable tie fit the plastic sheild and wiring loom back onto the motor housing to stop it flaping around.
fit the belt back onto the motor pully on the correct grooves, and sip belt over drum pulley turning it round to help it ease on.

spin the pulley round a few times to make sure all ok, replace the back panel and screw

that should be it.

Alan Davies
April 2006