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  #1  
Old 11-30-2022, 06:21 PM
fehdxl fehdxl is offline
 
Join Date: Mar 2005
Location: Bellevue, NE
Posts: 712
Default RV-12iS Throttle Cable

We had the throttle cable wear to the point the throttle body spring couldn’t overcome the friction and allow the engine to go to full throttle; thankfully on the ground and not during a go-around. Interesting the MM describes a procedure to lube the cable but the initial, build instructions do not. Guess by that point certain things are assumed.

Anyway, just wanted to point out there’s a lube procedure and also a timing test to make sure it moves forward w the friction knob loose in a certain period of time.

Fly Safe!

Jim
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  #2  
Old 11-30-2022, 07:03 PM
Piper J3's Avatar
Piper J3 Piper J3 is offline
 
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Location: Hinckley, Ohio
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On J-3 Cub I owned…. vibration caused the spiral wind of the carb heat cable jacket to wear a like pattern on the solid push-pull inner wire to the point where the cable finally locked-up...
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Jim Stricker - EAA #499867
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80 hrs Flying Aeronca Chief 11AC N86203
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Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 830

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  #3  
Old 11-30-2022, 09:21 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
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Quote:
Originally Posted by Piper J3 View Post
On J-3 Cub I owned…. vibration caused the spiral wind of the carb heat cable jacket to wear a like pattern on the solid push-pull inner wire to the point where the cable finally locked-up...
I'm pretty sure the cables used on the RV-12 have a teflon inner liner so there is never any contact between the cable housing and the inner wire.
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Scott McDaniels
Hubbard, Oregon
Formerly of Van's Aircraft Engineering Prototype Shop
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RV-6A (aka "Junkyard Special ")
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  #4  
Old 12-06-2022, 12:54 PM
fehdxl fehdxl is offline
 
Join Date: Mar 2005
Location: Bellevue, NE
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Just to follow up, replaced the cable and lubed with LPS2 before installation. All works well now.

Here’s the throttle cable lubing info from the maintenance manual.

Fly safe!

-Jim
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