Among them are the in-person views of the motor schematics (both those for 505-512 and 516 shown), and field and armature combinations and breakdown by letter codes in the unit serial number.
Another is of a service bulletin regarding a change to the brush roll for model 514. On models built up to serial no. 482-227, the brush roll adjusting screws were exactly the same as those for model 513 (1" long); the longer 1-3/8" screws were used on the 514 brush rolls for units built since serial no. 482-228.
~Ben[this post was last edited: 5/22/2020-19:43]
Another is of a service bulletin regarding a change to the brush roll for model 514. On models built up to serial no. 482-227, the brush roll adjusting screws were exactly the same as those for model 513 (1" long); the longer 1-3/8" screws were used on the 514 brush rolls for units built since serial no. 482-228.
~Ben[this post was last edited: 5/22/2020-19:43]
