[R-390] Clutch!

[Barry]

Pete,

When / if you do the clutch rebuild, I'd like to know how many spring
washers you find in each.  I'm wondering if they Motorola may have too many
spring washers thus requiring just a wee bit more disengagement pressure
than might be necessary and that's what might be causing the stickiness.
Just a thought.  I'm thinking this might have been something they set at the
factory based on some pressure test, but not sure.

Thanks!

Barry - N4BUQ

----- Original Message ----- 
From: "G4GJL" <g4gjl at btopenworld.com>
To: "Barry" <N4BUQ at aol.com>; "R-390-List" <R-390 at mailman.qth.net>
Sent: Monday, May 16, 2005 4:01 PM
Subject: Re: [R-390] Clutch!


> Thanks for that, Barry.
>
> You have prompted me to tak a closer look at the clutch designs. I seem to
> recall about 90deg was all you needed on one or two sets I have played
with
> at a local Ham's QTH..
>
> I think you would be right to remove all / ther MAX amount of stray oil /
> grease etc. I dont think it would help the clutch bite at all.
>
> Im doing a couple of St Juliens rebuilds at the moment , so I have the
> opportunity to get to grips with the designs at CLOSE quarters! Thanks for
> the comments.
>
> 73
>
> Pete
> G4GJL
>
>
> ----- Original Message ----- 
> From: "Barry" <N4BUQ at aol.com>
> To: "G4GJL" <g4gjl at btopenworld.com>; "R-390-List" <R-390 at mailman.qth.net>
> Sent: Monday, May 16, 2005 7:07 PM
> Subject: Re: [R-390] Clutch!
>
>
> > For the new one, it is about 180 to 270 degress from the point at which
I
> > can feel the disk first engage the posts to where the clutch is
> > disengaged.
> > When it does disengage, the geartrain is immediately freed from the PTO;
> > not
> > exactly so on the older (Motorola) one.
> >
> > On the older one, it doesn't seem that much different, but when the
clutch
> > disengages, it isn't quite fully disengaged until I rotate the KC knob a
> > bit.  It's as if something is sticking and it takes a slight bit of
> > rotational force to free it.  Once that happens, it rotates pretty
freely.
> > I'm thinking it may have some sticky residue somewhere on the clutch
disks
> > that still needs to come off.  I tried it oiled which did not work very
> > well
> > at all.  The oil caused the plates to stick together big time.  It
should
> > be
> > dry at this point, but maybe some of the Mobil One got into it.  Either
> > that
> > or there is something else sticking.
> >
> > Thanks,
> >
> > Barry - N4BUQ
> >
> > ----- Original Message -----
> > From: "G4GJL" <g4gjl at btopenworld.com>
> > To: "Barry" <N4BUQ at aol.com>; "R-390-List" <R-390 at mailman.qth.net>
> > Sent: Monday, May 16, 2005 8:22 AM
> > Subject: Re: [R-390] Clutch!
> >
> >
> >> Barry, et al.,
> >>
> >> How many degrees of rotation do you need to get satisfactory
> > disengagement?
> >>
> >> My 390As all seem to need 270 to 360 deg. My R391 needs a lot
> >> less....maybe90deg only.
> >> Is there a difference in the designs here? I have not had the 391 apart
> >> to
> >> look at the mechanism closely.
> >>
> >> Pete
> >> G4GJL
> >>
> >>
> >> ----- Original Message -----
> >> From: "Barry" <N4BUQ at aol.com>
> >> To: "R-390-List" <R-390 at mailman.qth.net>
> >> Sent: Sunday, May 15, 2005 4:47 AM
> >> Subject: [R-390] Clutch!
> >>
> >>
> >> > So, this is what it's like to have a clutch that works properly!  I
> >> > rebuilt
> >> > the clutch mechanisms in both my R309A's.  The Motorola has always
been
> >> > sticky.  Disengage the clutch and the VeederRoot still moves a bit
> >> > until
> > I
> >> > rock the KC knob a bit.  On the "new" one (Teledyne), disengage the
> > clutch
> >> > (and I can really tell that it disengages) and the VeederRoot counter
> >> > stays
> >> > very still and I can adjust zero very easily.
> >> >
> >> > So much fun...
> >> >
> >> > Barry - N4BUQ
> >> >
> >> > _____________________________________________________________
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> >> >
> >>
> >>
> >>
> >
> >
>
>
>