---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Mon 04/18/11: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 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 _____________________________________ Time: 04:56:15 AM PST US From: Charles Kuss Subject: RE: RV-List: "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 wrote: > From: Ken Cantrell > 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" > > 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 _____________________________________ Time: 05:45:48 AM PST US Subject: RV-List: Re: RV-List Digest: 2 Msgs - 04/17/11 From: Mark Frederick ________________________________ Message 1 > _____________________________________ > > > Time: 03:26:28 PM PST US > From: Matt Dralle > 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! 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