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09-20-2009 07:43 PM  11 years ago
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Dr. Fibinotchi

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Sioux Falls SD

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auto hub wear.
I pulled my crown gear off my auto hub and changed out the gear that was stripped. I have done 3 gallons worth of flying since Ircha and pulled it apart after a mishap. The shaft that slides into the auto hub is showing some wear. I could feel a ridge where this is building. I hit it with some 600 grit sandpaper and smoothed it out, but I am wondering if this is normal. I do lube the inside and the shaft lighly wiht some light oil after its been cleanned.

-Cody
If you want others to be happy, practice compassion. If you want to be happy, practice compassion.
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09-20-2009 07:55 PM  11 years ago
Knud Pedersen

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Denmark - Europe

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Hi
Do you mean like this:

?

I sometimes grit it with some sandpaper, just to smotth it a little...
If the ridge is to big it is harde to disamble the auto hub.
ChopperKnud
Team Miniature Aircraft
ThePitchbrothers
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09-20-2009 08:12 PM  11 years ago
xcell90

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Michigan

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Mine does the same thing I guess it's normal. Never notice until taking it apart.
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09-21-2009 02:42 AM  11 years ago
Dr. Fibinotchi

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Sioux Falls SD

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yea
Is it possible that there is not enough lub in the torrington and that a little more is needed for the shoes to ride on lub rather than drag on a somewhat dry surface?

-C
If you want others to be happy, practice compassion. If you want to be happy, practice compassion.
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09-21-2009 03:13 AM  11 years ago
cdrking

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Seattle

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It is normal, just hit it with some sandpaper when you have it apart to oil it. MA recommended about 75 flights and then a re-oil.

Jeff
To hover is divine, the alternative is rather PLANE.
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09-21-2009 03:15 AM  11 years ago
xcell90

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Michigan

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Yes I think your right I only lube mine when it's apart. You should make that regular maintaince. The easy way is to take the upper bearing block bolts off, that way you don't have to redo the main shaft collars.
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09-29-2009 05:02 AM  11 years ago
FlytilyaDrop

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Playboy mansion

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Yes I think your right I only lube mine when it's apart. You should make that regular maintaince. The easy way is to take the upper bearing block bolts off, that way you don't have to redo the main shaft collars.[quote]

That is a great idea, dont know why I always un-did the collars.

Thanks dude.
This hobby sucks, when your not flying.
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10-08-2009 05:33 AM  11 years ago
ractsaf

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St. Louis Mo. USA

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Royal Purple Oil & Grease
Use royal purple oil or grease,the best oil & grease in the world. It will reduce heat & wear. Have fun & Good Luck!
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10-08-2009 09:29 PM  11 years ago
3D Heli Ireland

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Ireland

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Wear like that on the hub is fine, simply rub it as you have with the paper and that will sort that. When you go to reinstall it insert the hub a few mm in to open the Torrington bearing and with it open fill it with a good quality light oil. When the hub is pushed home it will seal the oil in and you won't have any issues.Skookum Robotics,Sav�x, Motors and Servos,Optipower,SwitchGlo,CML st
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10-31-2009 10:50 PM  11 years ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Auto hub--- wear inner gear 866-5...
/
/

I already buy part 866-5 inner gear and 0232 pinion gear to replace but I need some recomendations...
See this diagrams...

Problem is that inner gear is not wearing simetrically... I mean, It is wearing just in one place. See diagram above.
All the teeth are ok, except in the bad area in the diagram show above. See yellow arrows.

So, how come?

The only thing a I see different is that the auto hub assembly has a little movement by each other. Probable some shimm required.

Probably some shim in between..?

At this time, my fury 90 is waiting for surgery... and your recomendations...

/
Saludos cordiales,
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11-01-2009 12:54 AM  11 years ago
Thomas L Erb

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Alliance ohio

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Hi Rojoalfo! before you put the new upper gear on check to see if the mounting plate for the upper gear is bent or pressed on at a slight angle. you can put the assembly on a mainshaft and dial indicate it or even just use a pointer to see if it is running true. If it is running off it will cause the wear that you are discribing . it can also be the seat of upper gear being untrue. in either case it will cause the wear you discribed because the gear is wobbling up and down in rotation . if you have it mounted already just rotate it and see if the gear lash changes any during rotation. You only need to add shims if you need to adjust the pinion to bevel gear lash. Hope this helps

Tom
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11-01-2009 11:45 AM  11 years ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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mounting plate bent without crash?
/
/

Well, I'm going to take some pic of this failure.
Thanks for this recomentations...

/
Saludos cordiales,
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11-01-2009 01:38 PM  11 years ago
Thomas L Erb

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Alliance ohio

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it could have been bent due to a tail bump on the ground or just pressed on crooked . lots of ways to get bent. just seems the only way to see the wear you discribed is gear wooble for some reason.

Tom
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11-01-2009 06:51 PM  11 years ago
airdodger

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Johnston USA

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MA instructions state to use triflow or transmission oil in the auto bearing and fill until the unit can't hold anymore.Chris
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