[R-390] Sticking R-390A clutch plate.

[Tom M.]

Phil,

What I've done in the past is to disengage the clutch as much as possible, and
then squirt in some carb and choke cleaner or similar to clean off any old
gunk, and then let it dry out and lube with synthetic gear oil.

73 Tom
--- Philip B Atchley <ko6bb@juno.com> wrote:
> Hello all.
> Perhaps a month ago I had the RF deck out of this '67 EAC and very
> thoroughly cleaned the gear train and cam assembly. I didn't tear the
> gear train down as I didn't feel I wanted to go that far.  The entire
> mechanism is very 'free' and easy tuning.
> 
> In use though, I have noticed a problem with the Zero Adj clutch.  If I
> haven't adjusted the Zero adjust for a couple days, when I crank down the
> knob (to release the clutch) and then tune the KC knob the clutch sticks
> or drags the Veeder Root counter off Zero until it "breaks free" and then
> it's ok and good to go for future adjustments.       
> 
> I 'suspect' that old grease and grime may still be lurking on the clutch
> plate and that's causing the problem.  Is there a way to clean this
> critter WITHOUT having to remove the RF deck again and disassembling the
> gear train?   If I have to go through that I'll probably just live with
> it until the next time I have cause to do a teardown (the receiver is in
> daily use).
> 
> 73 de Phil  KO6BB
> Loving home provided for wayward Boatanchor Receivers.
> R-390A '67 EAC.  HALLICRAFTERS SX-71 ('53) & 5R10A ('53).
> REALISTIC  DX-160 ('78).  HOMEBREW  Longwave CW receiver.
> Merced, Central California, 37.18N  120.29W  CM97sh.
> 
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