[NSRCA-discussion] Hacker gearbox

[Earl Haury]

Shell Stamina RL2 is a synthetic poly-urea grease that works well. 
Unfortunately it's a little hard to come by - usually only available from 
jobbers. (This stuff was recommended by friends who work in the Shell 
Technology Center - Grease Research Group basis the gearbox operating 
conditions.)

As any grease will work to the sides of the gears eventually - a re-grease 
interval around 40 or so flights is to be expected. Maybe more critical are 
the roller bearings in the planet gears - same situation with grease 
migration and very important to pack these bearings fully during 
re-greasing. (Make sure not to lose the small washers on the "pins" and to 
install the gears so that you can read the logo on the bearings.)

Earl

----- Original Message ----- 
From: "Richard Strickland" <richard.s at allied-callaway.com>
To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
Sent: Thursday, May 18, 2006 9:46 AM
Subject: Re: [NSRCA-discussion] Hacker gearbox


> Would you mind sending them to me also?  Hacker, for some reason doesn't
> seem to want to send them out.  They did send me some grease-but it seems 
> so
> light, I can't see where it would hang in for more than a few flights. 
> I'm
> tempted to use a heavier type with some 'body' to it.  Orland used the 
> stuff
> about 12 flights ago and the pinion stripped out last night-gear teeth
> running around inside and trashing the rest. 
> richard.s at allied-callaway.com
> or pamrich47 at hotmail.com
>
> Thanks,
>
> Richard
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org]  On Behalf Of Scott
> Anderson
> Sent: Thursday, May 18, 2006 8:10 AM
> To: NSRCA Mailing List
> Subject: Re: [NSRCA-discussion] Hacker gearbox
>
> Stuart,
>
> Sent you 3 pages of instructions that I got from Cameron Smith.
>
> Scott Anderson
> D3 AVP
> ----- Original Message -----
> From: "Stuart Chale" <schale at optonline.net>
> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
> Sent: Thursday, May 18, 2006 8:51 AM
> Subject: [NSRCA-discussion] Hacker gearbox
>
>
>>
>> I know people have mentioned fairly frequent re-greasing of the gearbox 
>> on
>> the Hacker motors.  I think the general recommendation was every 50
>> flights.
>>
>> How do you pull apart the gearbox and what grease do you use?
>> Any precautions on doing this?
>>
>> Picture of motor installation attached.
>>
>> Thanks
>> Stuart
>>
>
>
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