[NSRCA-discussion] Hacker gearbox

Thu Jun 1 13:54:33 AKDT 2006

All of the bearings in the Hacker gearbox are sealed except for the three 
planetary gears that have needle (not ball) bearings. I doubt those are 
available sealed and I'm not sure if a needle bearing CAN be sealed anyway. 
My guess is that it can't.

Verne

----- Original Message ----- 
From: "Steven Maxwell" <patternrules at earthlink.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, May 31, 2006 12:42 AM
Subject: Re: [NSRCA-discussion] Hacker gearbox

> Verne have you looked for sealed bearing for the Hacker, I think you have
> a good idea if we could find the sealed bearing needed to keep the oil in.
>
> Steven Maxwell
>
>
>
>
>> [Original Message]
>> From: Verne Koester <verne at twmi.rr.com>
>> To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
>> Date: 5/31/2006 12:24:04 AM
>> Subject: Re: [NSRCA-discussion] Hacker gearbox
>>
>> Never saw any fuzzies from the pipe cleaners, but then, the ones I had
>> laying around were at least twenty years old. OTOH, my eyes are
> fifty-three
>> so I may have missed them anyway. After I've cleaned everything out, I
> blow
>> it all out real good with my air compressor because I DO see little bits
> of
>> paper towel here and there.
>>
>> There's a big difference between the needle bearings in the planetaries
> and
>> the sealed bearings that the shaft runs in. We WANT to remove the old
> grease
>> in the planetaries. If we remove the grease in the sealed bearings,
> there's
>> no practical way to replace it. Personally, I wish the whole system was
> as
>> tight as our glow motors, because then we could run 90-weight gear oil
> and
>> not have anything to worry about for the whole season.
>>
>> 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 10:35 PM
>> Subject: Re: [NSRCA-discussion] Hacker gearbox
>>
>>
>> > 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
>> >> >> >> >
>> >> >> >>
>> >> >> >>
>> >> >>
>> >>
>> >>>>
> ------------------------------------------------------------------------
>> > -
>> >> > -
>> >> >> > ------
>> >> >> >>
>> >> >> >>
>> >> >> >> > _______________________________________________
>> >> >> >> > NSRCA-discussion mailing list
>> >> >> >> > NSRCA-discussion at lists.nsrca.org
>> >> >> >> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>> >> >> >>
>> >> >> >> _______________________________________________
>> >> >> >> NSRCA-discussion mailing list
>> >> >> >> NSRCA-discussion at lists.nsrca.org
>> >> >> >> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>> >> >> >
>> >> >> > _______________________________________________
>> >> >> > NSRCA-discussion mailing list
>> >> >> > NSRCA-discussion at lists.nsrca.org
>> >> >> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>> >> >> >
>> >> >>
>> >> >> _______________________________________________
>> >> >> NSRCA-discussion mailing list
>> >> >> NSRCA-discussion at lists.nsrca.org
>> >> >> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>> >> >
>> >> > _______________________________________________
>> >> > NSRCA-discussion mailing list
>> >> > NSRCA-discussion at lists.nsrca.org
>> >> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>> >>
>> >> _______________________________________________
>> >> NSRCA-discussion mailing list
>> >> NSRCA-discussion at lists.nsrca.org
>> >> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>> >
>> > _______________________________________________
>> > NSRCA-discussion mailing list
>> > NSRCA-discussion at lists.nsrca.org
>> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>
>> _______________________________________________
>> NSRCA-discussion mailing list
>> NSRCA-discussion at lists.nsrca.org
>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> 