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  #21  
Old 03-05-2018, 12:29 PM
JimRice JimRice is offline
 
Join Date: Aug 2014
Location: Collierville, TN
Posts: 92
Default Ring Gear and Bendix Drive

I have both a new 72566 ring gear and EBB-131A Bendix drive on order. I really don't think the ring gear teeth were chipped before, but were caused by the Bendix withdrawing while still under load. Several folks have reinforced that belief. Now it is hurry up and wait.
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Jim Rice
Collierville, TN

1994 RV-4 N4WJ (Purchased/Flying)
1946 J-3 Cub N7155H (Restored/Flying)
1946 Globe Swift N3368K (Purchased Restored/Flying SOLD)
1987 Starduster Too SA-300 (Purchased/Flying/SOLD)
1994 V6STOL (Built w/dad/SOLD)

US Army Retired (still working to pay for flying)

When my ship comes in, I'll probably be at the airport.
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  #22  
Old 03-06-2018, 11:23 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 3,338
Default

Quote:
Originally Posted by JimRice View Post
I have both a new 72566 ring gear and EBB-131A Bendix drive on order. I really don't think the ring gear teeth were chipped before, but were caused by the Bendix withdrawing while still under load. Several folks have reinforced that belief. Now it is hurry up and wait.
As others mentioned, it looks like that wear is from the bendix holding the gear in a partially engaged state. That wears does not appear to have been caused by the withdrawl of the gear.
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RV-6A / IO-320, Flying as of 8/2015
RV-10 in progress
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  #23  
Old 03-13-2018, 02:17 PM
JimRice JimRice is offline
 
Join Date: Aug 2014
Location: Collierville, TN
Posts: 92
Default Starter Bolt Torque?

I'm in the process of getting everything put back together. New ring gear installed and new starter Bendix drive. I've found all the info I need but one piece is missing.

I have a Props Inc wood prop and Jeff told me 16-18 ft-lbs on 7/16 bots for the wood prop. It is one with many laminations. From Saber website I found 35-45 ft pounds for the prop extension to the crankshaft for 7/16" bolts. Hoping to torque those down, check prop track and safety everything up soon.

What I'm missing is, what is proper torque value for starter flange to engine case mount? The 5/16" studs and single bolt (front outboard), as I recall, are coarse thread and are threaded directly into the aluminum case. I'm not sure the torque setting for course thread steel bolts into aluminum. I believe it is in my Aircraft Mechanic Handbook, but I don't have it nearby and don't want to rely on it being there and find it isn't and be stopped in my tracks.

Thanks,

Jim
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Jim Rice
Collierville, TN

1994 RV-4 N4WJ (Purchased/Flying)
1946 J-3 Cub N7155H (Restored/Flying)
1946 Globe Swift N3368K (Purchased Restored/Flying SOLD)
1987 Starduster Too SA-300 (Purchased/Flying/SOLD)
1994 V6STOL (Built w/dad/SOLD)

US Army Retired (still working to pay for flying)

When my ship comes in, I'll probably be at the airport.
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  #24  
Old 03-14-2018, 08:34 AM
Red Mtn flyer Red Mtn flyer is offline
 
Join Date: Jul 2017
Location: Carson City, NV
Posts: 42
Default thought so, but checked: 100 in/lbs

from SkyTec's install instructions [just another reference]:
"Use the existing 5/16” bolt and nuts, or replace, as indicated by condition.
Replace any and all washers with four (4) AN936-516 internal tooth “star” lock
washers supplied or stock AN split-type lock washers. Do not use flat
washers. Torque the bolt and nuts to 100 in. lbs. "
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RLSA - A,G,W/S; Falco F-8L
50 yrs of flight and counting
Dues paid 2017, 2018
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  #25  
Old 03-14-2018, 09:09 AM
JimRice JimRice is offline
 
Join Date: Aug 2014
Location: Collierville, TN
Posts: 92
Default Great

Thank you, Ben. Much appreciated.
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Jim Rice
Collierville, TN

1994 RV-4 N4WJ (Purchased/Flying)
1946 J-3 Cub N7155H (Restored/Flying)
1946 Globe Swift N3368K (Purchased Restored/Flying SOLD)
1987 Starduster Too SA-300 (Purchased/Flying/SOLD)
1994 V6STOL (Built w/dad/SOLD)

US Army Retired (still working to pay for flying)

When my ship comes in, I'll probably be at the airport.
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  #26  
Old 03-14-2018, 09:20 AM
Walt's Avatar
Walt Walt is offline
 
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 4,874
Default

Quote:
Originally Posted by Red Mtn flyer View Post
from SkyTec's install instructions [just another reference]:
"Use the existing 5/16” bolt and nuts, or replace, as indicated by condition.
Replace any and all washers with four (4) AN936-516 internal tooth “star” lock
washers supplied or stock AN split-type lock washers. Do not use flat
washers. Torque the bolt and nuts to 100 in. lbs. "
Looks like an error in the skytec info:

Lycoming torque values list the 5/16 bolt/nut at 204 in/lbs.
(The 100 in/lbs is for 1/4" fasteners)
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EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
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Last edited by Walt : 03-14-2018 at 09:26 AM.
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  #27  
Old 03-14-2018, 09:27 AM
JimRice JimRice is offline
 
Join Date: Aug 2014
Location: Collierville, TN
Posts: 92
Default

Quote:
Originally Posted by Walt View Post
Looks like an error in the skytec info:

Lycoming torque values list the 5/16 bolt/nut should be 204 in/lbs.
(The 100 in/lbs is for 1/4" fasteners)
Is that for steel bolt into steel threads? That was my concern. I certainly do not want to strip the threads in the case, but also don't want my starter coming loose. I couldn't find a specific reference in the Lycoming manual for the starter nor a chart for aluminum mating surface.

Thx,
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Jim Rice
Collierville, TN

1994 RV-4 N4WJ (Purchased/Flying)
1946 J-3 Cub N7155H (Restored/Flying)
1946 Globe Swift N3368K (Purchased Restored/Flying SOLD)
1987 Starduster Too SA-300 (Purchased/Flying/SOLD)
1994 V6STOL (Built w/dad/SOLD)

US Army Retired (still working to pay for flying)

When my ship comes in, I'll probably be at the airport.
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  #28  
Old 04-01-2018, 07:59 AM
Larryskydives Larryskydives is offline
 
Join Date: Oct 2014
Location: Gautier, MS
Posts: 55
Default

Another thing to keep in mind. There are service instructions. Mine was doing the same at one time. And be sure to spray the bendix periodically with a silicone or LPS1. Nothing any thicker as it can attract dust and such. But the bendix can begin to stick, not letting it go out as far as it should.
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  #29  
Old 04-03-2018, 10:25 PM
BlndRvtr BlndRvtr is offline
 
Join Date: Mar 2009
Location: NE Where
Posts: 196
Default

Quote:
Originally Posted by Larryskydives View Post
And be sure to spray the bendix periodically with a silicone or LPS1... But the bendix can begin to stick, not letting it go out as far as it should.
I believe that last sentence has been your problem all along. Incomplete gear engagement due to a sticky Bendix. Most of the Bendix drives I seen have a sticker on them calling for 25 hr lubrication intervals. Yes it is a PITA, but if followed, I've found much of my starter angst goes away. However installing a B&C starter eliminated all my starter problems and no more frequent cleaning and lubing and the access hassle that comes with that. I feel it was money well spent.

George
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  #30  
Old 04-05-2018, 09:29 AM
JimRice JimRice is offline
 
Join Date: Aug 2014
Location: Collierville, TN
Posts: 92
Default New Bendix

The Bendix indeed seems to have fixed the problem. Good thing is now I should have no starter troubles for some time now. I've rebuilt the entire system from battery to starter, with exception of mag/starter switch. At this point I'm tempted to go ahead and get a kit for it and rebuild it too.

Just waiting for some decent weather to go flying after having plane down for extensive Condition Inspection.
__________________
Jim Rice
Collierville, TN

1994 RV-4 N4WJ (Purchased/Flying)
1946 J-3 Cub N7155H (Restored/Flying)
1946 Globe Swift N3368K (Purchased Restored/Flying SOLD)
1987 Starduster Too SA-300 (Purchased/Flying/SOLD)
1994 V6STOL (Built w/dad/SOLD)

US Army Retired (still working to pay for flying)

When my ship comes in, I'll probably be at the airport.
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