i want to replace motor brushers on my bosch wfx3267gb?

I want to replace the motor brushers in my bosch exxcel wfx3267gb I Have new brushers,I have removed the rear panel,removed the drive belt,taken out the two srcews,but the motor seem to be fixed,will i need a special tool to undo the plastic round bushers,or can they be prized out,removing the motor is the problem,any help would be greatfull,
geoff