Can I replace the drum bearings on my Miele W 919?

My Miele W919 nocks on spin. Theres at least 1/2 inch play on the inner drum relative to the outer at the front. Also at the rear a brown stain and metal shavings have been thrown out from the drive wheel. I assume this means the drum bearings have failed?
Is this a job I can tackle (I have an engineering background) and if so where can I find instructions for doing this?