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  #1  
Old 03-12-2021, 05:47 PM
Dvalcik's Avatar
Dvalcik Dvalcik is offline
 
Join Date: Jul 2011
Location: Royersford, PA
Posts: 879
Default Gearbox

As part of my conditional inspection, I sent the gearbox off for inspection.



Unfortunately I was in the club for recommended gear replacement. I created a poll to see how many people had nothing wrong, need an adjustment, or full gear replacement.

Just curious the rate of replace, adjust, or nothing needed.
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EAA 1250 KPTW
Royersford, PA
david@rv12pilot.com
2021 VAF Supporter


RV12 #568 EAB
* Started 9/30/2011
* 1st flight 8/30/12


http://www.rv12pilot.com
https://www.youtube.com/user/dvalcik
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  #2  
Old 03-12-2021, 09:04 PM
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DaleB DaleB is offline
 
Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,329
Default

I have a question about that. How did you get your gearbox off to send it for inspection/rebuild? I see one $500-plus tool to do that, or a $200-plus tool. Does one actually need to spend that much on a single-purpose tool to get the gearbox off? Or is there a simple, cheaper way to do it that I haven't heard about?

We're at a little over 600 hours now. We can go to 1000 before inspection, but I don't know that we should. I don't know of anyone local or even reasonably close that does Rotax maintenance...
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Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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  #3  
Old 03-12-2021, 09:31 PM
DHeal DHeal is offline
 
Join Date: Sep 2006
Location: Windsor, California
Posts: 999
Default

I understand that some of the major ROTAX parts suppliers have the specialized tools available for rent. In some cases, you can also build up your own tools. Much discussion and videos of this on the Rotax-Owner site. Also, there are several videos showing 912 gearbox removal and rebuilding on YouTube.
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EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
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  #4  
Old 03-13-2021, 07:14 AM
skydiverlv skydiverlv is offline
 
Join Date: Jul 2008
Location: kansas
Posts: 359
Default

Quote:
Originally Posted by DaleB View Post
I don't know of anyone local or even reasonably close that does Rotax maintenance...
I am not a Rotax owner but have a few buds that own them. Give Stol Creek Aviation a shout. Mike is the "go to" guy in the midwest, and also the ONLY factory authorized Edge Performance dealer/installer in the USA. His airstrip and shop is just NE of Wichita Kansas.

The video highlights a gearbox inspection/repair
https://www.youtube.com/watch?v=D3S83-IPgqA

https://stolcreek.com
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  #5  
Old 03-24-2021, 08:34 PM
Catbird Catbird is offline
 
Join Date: Oct 2009
Location: Birmingham, Alabama
Posts: 135
Default

OK, Iím more than just a little confused here. You started with a statement and photo related to gearbox removal and then jumped to gear leg replacement. Obviously, Iíve completely missed the segue between these two seemingly unrelated topics. Is your poll related to gear legs or gearboxes?
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  #6  
Old 03-25-2021, 06:40 AM
bsbarnes10 bsbarnes10 is offline
 
Join Date: Sep 2019
Location: Texas
Posts: 39
Default

I think he's referring to replacement of the gear(s) inside the gearbox, not the landing gear.

-B
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Dues Paid! Thanks for all the help...
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  #7  
Old 03-25-2021, 10:14 AM
NinerBikes NinerBikes is offline
 
Join Date: Dec 2018
Location: Granada Hills
Posts: 1,186
Default

Is it the dogs and clutch pack that need replacing and reshimming, or did the splines get eaten away and worn out?

Rotax recommends a 2500 rpm warm up engine speed, to help mitigate that.
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  #8  
Old 03-27-2021, 01:10 PM
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gblwy gblwy is offline
 
Join Date: Jun 2007
Location: Perth, Scotland
Posts: 517
Default 600 hours

Mine was overhauled at 600 hours as part of an exercise to trace engine vibration. Signs of wear on dog hub and drive dogs, but within acceptable limits.

Gearbox main bearing, thrust washer, disc springs, oil seal all replaced.
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  #9  
Old 03-27-2021, 01:52 PM
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DaleB DaleB is offline
 
Join Date: Sep 2012
Location: Omaha, NE (KMLE)
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Quote:
Originally Posted by gblwy View Post
Mine was overhauled at 600 hours as part of an exercise to trace engine vibration. Signs of wear on dog hub and drive dogs, but within acceptable limits.

Gearbox main bearing, thrust washer, disc springs, oil seal all replaced.
And did that fix the vibration?
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Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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  #10  
Old 03-28-2021, 03:41 PM
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Dvalcik Dvalcik is offline
 
Join Date: Jul 2011
Location: Royersford, PA
Posts: 879
Default Gearbox

I received my gearbox back from Lockwood and finished most of my conditional inspection. Installed the gearbox with help from my fellow RVrs in the area. Great community, Thanks Dave, Mark, & Al









Went back together very easy with their help and hoping to test fly early this week
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EAA 1250 KPTW
Royersford, PA
david@rv12pilot.com
2021 VAF Supporter


RV12 #568 EAB
* Started 9/30/2011
* 1st flight 8/30/12


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https://www.youtube.com/user/dvalcik
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