While you wait for answers, we may have found some information which could help you.
Click here for Belt Change PartsBosch al3640 cv?
Bosch charger Al 3640 cv for lawn mower is not charging. No lights?
Bosch AL 3640 CV charger repair & parts identification?
re spring lever on Bosch 34R mower?
How can I fix my Bosch Rotak 37 lawnmower?
Bosch Rotak cuts out after 3 seconds?