Magnavox MX850 Record Changer service information needed

Howdy Doody,

Am looking for the Magnavox Service Bulletin 5263 which covers the MX850 record changer. I've looked high and low on Riders and Sams and can find NO information on this unit. Not sure who made it, but suspect Webster-Chicago but don't find anything anywhere near what this unit looks like. I'm restoring an old Maggy Embassy Console which uses this changer. It has a solenoid which activates the reject cycle so I'd like to keep it. So far I haven't been able to get the unit to cycle correctly and have the arm land on the various size records. I'm suspecting there may be a part missing or a spring or ??? Any help would be greatly appreciated. Thank you all.

Harry