[NSRCA-discussion] Hacker gearbox

Tue May 30 13:00:50 AKDT 2006

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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