R-390 Help Please

[Les Zwiebel WB6ORZ]

    For R-390 (non-A)
    1. Need (missing) parts. For the Dial Zero Clutch Assembly. 
For reference, see TM 5820-357-35-79, page 175. Exploded view 
p/n's are 13 through 21. Anybody have a donor rig for a Clutch 
Assembly?
    2. Hints anyone? Have PTO out, but can't turn the 
non-metallic (bakelite) cover screw. How to remove it so I can 
adjust end-point run-out at inductor L701. The screw is seized 
up. If I break it, pieces would fall down into PTO. That would 
be bad.
    Thanks in advance!
    (((((73)))))
    Les
    ---===WB6ORZ===---

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