[NSRCA-discussion] Hacker gearbox

Tue May 30 18:35:18 AKDT 2006

Verne, as you point out the degreaser probably is not a problem with the
three small gears with the roller bearings.

The other comment I have, after doing the regreasing last night, is that the
pipe cleaners tend to leave little fuzzies all over the place. They do work
extremely well, but I had a lot of trouble getting everything fuzz free. I
think the toothbrush sounds like a much better idea.

I was also surprised that the Comp. instructions suggested Kleenex since
they will certainly leave behind lots of small fuzz. I think the ideal thing
may be lens cleaners for glasses (the non-wetted type). Because these done
leave fuzz behind.

Keith Black

----- Original Message ----- 
From: "Verne Koester" <verne at twmi.rr.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Tuesday, May 30, 2006 4:00 PM
Subject: Re: [NSRCA-discussion] Hacker gearbox

> When the C50 first came out, there were no directions available. The
> directions you're seeing come from the competition version which has only
> recently been available to those of us possessing normal flying skills.
>
> I still use wax and grease remover to clean out the old grease from the
> planetaries once they've been taken out of the gearbox. I now use paper
> towels, pipe cleaners, and old toothbrushes for everything else. Doesn't
> clean as good as the liquid, but at least nothing harmful is getting into
> the sealed bearings. The planetaries are entirely different as you know.
> They have unsealed needle bearing and need a thorough cleaning and
> repacking.
>
> Verne
>
>
> ----- Original Message ----- 
> From: "Keith Black" <tkeithb at comcast.net>
> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> Sent: Tuesday, May 30, 2006 12:36 AM
> Subject: Re: [NSRCA-discussion] Hacker gearbox
>
>
> > Verne, looking back over your earlier message and the Hacker directions
> > for
> > the Comp motor I'm a bit surprised you use the PPG wax and grease
remover.
> > The directions say "Don't use chemical cleaners! These will destroy the
> > grease in the ball bearings of the output shaft!"
> >
> > Did you hear from Hacker that it would be safe to use the PPG degreaser,
> > prior experience, etc.?
> >
> > Please elaborate.
> >
> > Thanks,
> > Keith Black
> >
> > ----- Original Message ----- 
> > From: "Verne Koester" <verne at twmi.rr.com>
> > To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> > Sent: Monday, May 29, 2006 10:32 PM
> > Subject: Re: [NSRCA-discussion] Hacker gearbox
> >
> >
> >> Keith,
> >> Our experience is that you don't need loctite as long as you use a
strap
> >> wrench to tighten the gear box and get good torque on the set screws.
> >> Loctite on the threads of the gear box to motor make it a bear to get
off
> >> again. I helped Andrew grease the gearbox on his standard C50 last
summer
> > 4
> >> or 5 times and we never used loctite and it never showed any signs of
> >> loosening up. Of course, if your gear box spins itself off the motor,
I'm
> >> just gonna say you didn't get it tight enough.....   ;>)
> >>
> >> Verne
> >>
> >>
> >> ----- Original Message ----- 
> >> From: "Keith Black" <tkeithb at comcast.net>
> >> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> >> Sent: Monday, May 29, 2006 11:12 PM
> >> Subject: Re: [NSRCA-discussion] Hacker gearbox
> >>
> >>
> >> > I'm in the process of doing a Lube Job to my C50 Standard Hacker. Is
> >> > loctite
> >> > required when putting the STD C50 back together (I assume it is based
> >> > on
> >> > comments in Verne's post)?
> >> >
> >> > If so, where is the loctite used, threads on gearbox or threads on
set
> >> > screws?
> >> >
> >> > What loctite is used? 222 (low-strength) or medium?
> >> >
> >> > Thanks,
> >> > Keith Black
> >> >
> >> > ----- Original Message ----- 
> >> > From: "Verne Koester" <verne at twmi.rr.com>
> >> > To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> >> > Sent: Sunday, May 21, 2006 12:20 PM
> >> > Subject: Re: [NSRCA-discussion] Hacker gearbox
> >> >
> >> >
> >> >> Stuart,
> >> >> The separate washer is unique to the comp motor. BTW, the gears and
> >> >> all
> >> > the
> >> >> stuff inside is the same. The biggest advantage to the comp motor is
> > the
> >> >> brake built in to the controller and the fan between the gearbox and
> > the
> >> >> motor the blows air through the windings. There's no power
> >> >> differences.
> >> >>
> >> >> Back to yours. Without knowing what grease the previous owner used,
> > it's
> >> >> nearly impossible to analyze it. Looking at your photo, the grease
> >> >> appears
> >> >> wet and shiny which is good. When it turns into a dull, metal-laden
> >> >> paste,
> >> >> bad things happen. I suspect you're going to see some darkness
> > regardless
> >> > of
> >> >> the grease, at least until the gears wear in.  I'd suggest following
> > the
> >> >> directions you downloaded which I'm assuming came from the comp
> > version.
> >> >> Clean all the existing grease out and make sure you don't lose the
> > little
> >> >> bitty washers under each of the three planetary gears.
> >> >>
> >> >> If you take the shaft out, make sure to keep track of those washers
as
> >> > well.
> >> >> There's three of them and each one is different and needs to be in
the
> >> > right
> >> >> place.
> >> >>
> >> >> BTW, using a syringe and your finger to pack the bearing in the
> >> > planetaries
> >> >> as suggested in the comp directions works really well. The pressure
> >> > created
> >> >> by that technique forces lube in behind the needles in those little
> >> >> bearings. I use PPG wax and grease remover and a pipe cleaner to
clean
> >> >> the
> >> >> planetaries and bearings prior to repacking them.
> >> >>
> >> >> Finally, make sure the planetaries are placed back in as described
in
> > the
> >> >> instructions. One end has a bevel ground in and it needs to be
> >> >> oriented
> >> >> properly. The bevel is on the side where printing is stamped into
the
> >> >> face
> >> >> of the needle bearings and is the side you see in your attached
photo.
> >> >>
> >> >> Hope this helps.
> >> >> Verne
> >> >>
> >> >>
> >> >> ----- Original Message ----- 
> >> >> From: "Stuart Chale" <schale at optonline.net>
> >> >> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
> >> >> Sent: Sunday, May 21, 2006 8:42 AM
> >> >> Subject: Re: [NSRCA-discussion] Hacker gearbox
> >> >>
> >> >>
> >> >> > Now for the question.
> >> >> >
> >> >> > Attached is a picture of my motor open.  Standard C50 not the Comp
> >> >> > version.
> >> >> > The washer over the planetary gears is different from the pictures
> >> >> > in
> >> > the
> >> >> > re-greasing directions.  There is a washer press fit into the
cover
> >> >> > that
> >> >> > is
> >> >> > not as large as the one pictured in the directions.  For those of
> >> >> > you
> >> > who
> >> >> > have opened your motors, is this normal or am I missing the larger
> >> > washer?
> >> >> >
> >> >> >>From the pictures it appears that the grease is white.  Was any
> > version
> >> > of
> >> >> > it dark?  Or does it get dark after running?  The grease in my
motor
> > is
> >> >> > pretty dark. The motor was bought second hand supposedly un-run
but
> >> >> > I
> >> > get
> >> >> > the feeling that is not the case.
> >> >> >
> >> >> > Thanks,
> >> >> > Stuart
> >> >> >
> >> >>
> >> >>
> >>
>
>>> ------------------------------------------------------------------------
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> > -
> >> > ------
> >> >>
> >> >>
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