Today's Message Index:
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1. 04:56 AM - Re: "Worn Out" CT-Q67 Cable Assembly (Warning!) (Charles Kuss)
2. 05:45 AM - Re: RV-List Digest: 2 Msgs - 04/17/11 (Mark Frederick)
Message 1
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Subject: | "Worn Out" CT-Q67 Cable Assembly (Warning!) |
Matt,
If you would like a cleaner method to accomplish what Ken suggested below, simply
buy a motorcycle cable oiler from your local motorcycle shop or online. See
http://www.jpcycles.com/product/9100065
These work great and are inexpensive.
Charlie Kuss
--- On Sun, 4/17/11, Ken Cantrell <kcflyrv@comcast.net> wrote:
> From: Ken Cantrell <kcflyrv@comcast.net>
> Subject: RE: RV-List: "Worn Out" CT-Q67 Cable Assembly (Warning!)
> To: rv-list@matronics.com
> Date: Sunday, April 17, 2011, 6:52 PM
> "Ken Cantrell" <kcflyrv@comcast.net>
>
> Matt,
> I had a similar experience with my prop cable and talked to
> my local A&P. He
> suggested the following:
> Take a short piece of rubber tubing with an I.D. the same
> as the O.D. of the
> prop cable.
> Slip it over the disconnected cable (governor end) and put
> a small hose
> clamp on it to make it a snug fit.
> Spray some Gunk spray lube in the short piece of rubber
> tubing. Hold the end
> up so a small amount of liquid lube is in the tubing.
> Take your compress air supply and spray it into the end of
> rubber tubing,
> holding it tight in your hands; forcing the lube into the
> prop cable
> housing.
> Be sure to put a rag around the other end to avoid a big
> mess.
> I did this and my prop cable operates like new now.
>
> Ken Cantrell
> RV-6, 1054 hours.
>
> -----Original Message-----
> From: owner-rv-list-server@matronics.com
> [mailto:owner-rv-list-server@matronics.com]
> On Behalf Of Matt Dralle
> Sent: Sunday, April 17, 2011 3:23 PM
> To: rv-list@matronics.com;
> rv3-list@matronics.com;
> rv4-list@matronics.com
> Subject: RV-List: "Worn Out" CT-Q67 Cable Assembly
> (Warning!)
>
>
> Dear Listers,
>
> At 170 hours on my RV-8 now, the Prop control had become
> increasing more
> difficult to move starting around 100 hours. The
> Mixture and Throttle have
> worked fine and continue to. All three controls use
> the standard "Green"
> control cables from Vans, typically a "CT-Qxx" part.
>
> A couple of weeks ago, I disassembled the Governor end of
> the assembly and
> made sure that there was no binding or issues on that
> end. I even lightly
> lubed up the various moving bits. Yesterday, the Prop
> control became so
> difficult to move that I had trouble cycling the prop
> during run up. I
> pulled the whole throttle quadrant installation apart today
> to have a look.
> I got the cable completely out of the airplane and there
> are NO outward
> signs of wear or abuse of *any kind*. But even with
> the cable completely
> out of the plane and nothing connected to either end, it is
> almost
> impossible to move the cable!! I have a new CT-Q67
> cable assembly for my
> front-mounted governor installation and I'm going to
> install that next.
>
> But, I wanted to give everyone a heads up on these CT-Q
> controls. These
> things are built like they go on a Caterpillar Tractor, so
> I can't figure
> out why they would wear out like this.
>
> If one of these controls starts getting stiff and tight,
> its probably not
> going to get any better. Replace it before it becomes
> a safety issue! Not
> a big deal on the Prop control, but on a throttle or
> mixture it could be a
> serious concern.
>
> Best regards,
>
> Matt
>
> -
> Matt Dralle
> RV-8 #82880 N998RV
> http://www.mattsrv8.com - Matt's RV-8 Construction
> Blog
> http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV
> YouTube Channel
> Status: 170+ Hours Total Time Since May 2 2010 Test
> Flight!
>
>
>
>
>
>
> Forum -
> FAQ,
> - MATRONICS WEB FORUMS -
> List Contribution Web Site -
> -Matt
> Dralle, List Admin.
>
>
>
>
Message 2
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Subject: | Re: RV-List Digest: 2 Msgs - 04/17/11 |
________________________________ Message 1
> _____________________________________
>
>
> Time: 03:26:28 PM PST US
> From: Matt Dralle <dralle@matronics.com>
> Subject: RV-List: "Worn Out" CT-Q67 Cable Assembly (Warning!)
>
>
> Dear Listers,
>
> At 170 hours on my RV-8 now, the Prop control had become increasing more
> difficult
> to move starting around 100 hours. The Mixture and Throttle have worked
> fine
> and continue to. All three controls use the standard "Green" control
> cables
> from Vans, typically a "CT-Qxx" part.
>
> A couple of weeks ago, I disassembled the Governor end of the assembly and
> made
> sure that there was no binding or issues on that end. I even lightly lubed
> up
> the various moving bits. Yesterday, the Prop control became so difficult
> to
> move that I had trouble cycling the prop during run up. I pulled the whole
> throttle
> quadrant installation apart today to have a look. I got the cable
> completely
> out of the airplane and there are NO outward signs of wear or abuse of
> *any kind*. But even with the cable completely out of the plane and
> nothing
> connected to either end, it is almost impossible to move the cable!! I
> have a
> new CT-Q67 cable assembly for my front-mounted governor installation and
> I'm
> going to install that next.
>
> But, I wanted to give everyone a heads up on these CT-Q controls. These
> things
> are built like they go on a Caterpillar Tractor, so I can't figure out why
> they
> would wear out like this.
>
> If one of these controls starts getting stiff and tight, its probably not
> going
> to get any better. Replace it before it becomes a safety issue! Not a big
> deal
> on the Prop control, but on a throttle or mixture it could be a serious
> concern.
>
> Best regards,
>
> Matt
>
> -
> Matt Dralle
> RV-8 #82880 N998RV
> http://www.mattsrv8.com - Matt's RV-8 Construction Blog
> http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
> Status: 170+ Hours Total Time Since May 2 2010 Test Flight!
>
>
> Hey Fellas:
I have seen this too many times - looks like heat is the killer. Move the
cables away from the killer exh system, then you can wrap the cables with
spark plug wire insulation - - a smaller version of the normal hose type
heat protective stuff. Lube will not work, as the nylon inner wrap is balled
around the wire - hanging on for dear life! If this persists, you can try
the 920 cables from ACS, or buy replacement cables from Cablecraft -
certified stuff, thus very expensive.
Carry on!
Mark
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