---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Thu 10/22/09: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:37 AM - Front Gear Leg Bolt Hole Wear (Stucklen, Frederic W) 2. 05:45 AM - Re: Front Gear Leg Bolt Hole Wear (Karl Ahamer) 3. 06:29 AM - Re: Front Gear Leg Bolt Hole Wear (Dale Ensing) ________________________________ Message 1 _____________________________________ Time: 04:37:43 AM PST US From: "Stucklen, Frederic W" Subject: RV-List: Front Gear Leg Bolt Hole Wear I posted this on the Van's Airforce site last week, but thought that it might be a good idea to add it to this site as well. The type of locktite I think was #609, but am not sure as the container label has worn off.. It's interesting to note that , while the front gear leg mounting holes have worn, there haven't been any reported instances of the main gear leg m ounting hole wearing.... This front gear fix probably should be used on all new assemblies..... Fred Hi All, I just got done repairing the front gear leg mount bolt hole on my RV-7A a while back. There was a slight bit of wear due to the bolt either loosening and/or the front fork being too tight, causing excessive torque on the gea r leg during turns. In any case, there was a slight amount of rotation in t he gear leg with the bolt loose, indicating that the bolt holes were slight ly oblong... Here's what I did to fix the problem. First I tied down the tail, and remov ed the front gear leg. Next, I cleaned both the top mount area and the lowe r mount area of any grease. I did the same to the gear leg, but re-greased the lower mount area where it comes into contact with the mount. Then I app lied permanent Lock-Tight to the inside of the upper mount area, and also c oated the top mount area of the gear leg. The gear leg was then inserted ba ck into the mount and the bolt partially re-inserted. (My bolt inserts from the top. The firewall has an indentation for the nut. There is no hole in the firewall for the bolt...). Next I used a small amount of "Liquid Steel" into the worn areas of the gea r leg mounting bolt holes. (Since there was very little wear, I did this in stead of drilling out the mount/gear to a larger size bolt, or inserting a taper pin.) The bolt was then torqued normally. I let the assembly dry befo re testing it for any movement. Solid.... I've flown over 100 Hours after that fix was performed, and still have no m ovement in the front gear leg upper mount area. I have checked it at every oil change for any signs of movement.... With the history of issues in this area, it would seem prudent to do the fi nal front gear leg assembly with Lock-Tight on the upper mount area. This w ould prevent the re-occurring issue that we've seen in this area on the -A RV models.... And I've seen it happen to every RV-XA that I've owned.... __________________ Fred Stucklen RV-7A N924RV Flying RV-6A N926RV 875 Hrs (Sold) RV-6A N925RV 2008 Hrs (Sold) ________________________________ Message 2 _____________________________________ Time: 05:45:29 AM PST US From: "Karl Ahamer" Subject: RE: RV-List: Front Gear Leg Bolt Hole Wear I used LOCTITE 680 on top and bottom area(nose gear) and no movement after 90 hours any more.. Karl 7A _____ From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@matronics.com] On Behalf Of Stucklen, Frederic W Sent: Thursday, 22 October 2009 10:19 PM Subject: RV-List: Front Gear Leg Bolt Hole Wear I posted this on the Van's Airforce site last week, but thought that it might be a good idea to add it to this site as well. The type of locktite I think was #609, but am not sure as the container label has worn off.. It's interesting to note that , while the front gear leg mounting holes have worn, there haven't been any reported instances of the main gear leg mounting hole wearing.. This front gear fix probably should be used on all new assemblies... Fred Hi All, I just got done repairing the front gear leg mount bolt hole on my RV-7A a while back. There was a slight bit of wear due to the bolt either loosening and/or the front fork being too tight, causing excessive torque on the gear leg during turns. In any case, there was a slight amount of rotation in the gear leg with the bolt loose, indicating that the bolt holes were slightly oblong... Here's what I did to fix the problem. First I tied down the tail, and removed the front gear leg. Next, I cleaned both the top mount area and the lower mount area of any grease. I did the same to the gear leg, but re-greased the lower mount area where it comes into contact with the mount. Then I applied permanent Lock-Tight to the inside of the upper mount area, and also coated the top mount area of the gear leg. The gear leg was then inserted back into the mount and the bolt partially re-inserted. (My bolt inserts from the top. The firewall has an indentation for the nut. There is no hole in the firewall for the bolt...). Next I used a small amount of "Liquid Steel" into the worn areas of the gear leg mounting bolt holes. (Since there was very little wear, I did this instead of drilling out the mount/gear to a larger size bolt, or inserting a taper pin.) The bolt was then torqued normally. I let the assembly dry before testing it for any movement. Solid.... I've flown over 100 Hours after that fix was performed, and still have no movement in the front gear leg upper mount area. I have checked it at every oil change for any signs of movement.... With the history of issues in this area, it would seem prudent to do the final front gear leg assembly with Lock-Tight on the upper mount area. This would prevent the re-occurring issue that we've seen in this area on the -A RV models.... And I've seen it happen to every RV-XA that I've owned.... __________________ Fred Stucklen RV-7A N924RV Flying RV-6A N926RV 875 Hrs (Sold) RV-6A N925RV 2008 Hrs (Sold) 16:44:00 ________________________________ Message 3 _____________________________________ Time: 06:29:04 AM PST US From: "Dale Ensing" Subject: Re: RV-List: Front Gear Leg Bolt Hole Wear Thanks Fred, Could you give us some tech data on the "Liquid Steel" please? Dale Ensing ----- Original Message ----- From: Stucklen, Frederic W To: rv-list@matronics.com Sent: Thursday, October 22, 2009 7:19 AM Subject: RV-List: Front Gear Leg Bolt Hole Wear I posted this on the Van's Airforce site last week, but thought that i t might be a good idea to add it to this site as well. The type of locktite I think was #609, but am not sure as the container label has worn off.. It's interesting to note that , while the front gear leg mounting hole s have worn, there haven't been any reported instances of the main gear leg mounting hole wearing.. This front gear fix probably should be used on all new assemblies... Fred Hi All, I just got done repairing the front gear leg mount bolt hole on my RV-7A a while back. There was a slight bit of wear due to the bolt either looseni ng and/or the front fork being too tight, causing excessive torque on the g ear leg during turns. In any case, there was a slight amount of rotation in the gear leg with the bolt loose, indicating that the bolt holes were slig htly oblong... Here's what I did to fix the problem. First I tied down the tail, and rem oved the front gear leg. Next, I cleaned both the top mount area and the lo wer mount area of any grease. I did the same to the gear leg, but re-grease d the lower mount area where it comes into contact with the mount. Then I a pplied permanent Lock-Tight to the inside of the upper mount area, and also coated the top mount area of the gear leg. The gear leg was then inserted back into the mount and the bolt partially re-inserted. (My bolt inserts fr om the top. The firewall has an indentation for the nut. There is no hole i n the firewall for the bolt...). Next I used a small amount of "Liquid Steel" into the worn areas of the g ear leg mounting bolt holes. (Since there was very little wear, I did this instead of drilling out the mount/gear to a larger size bolt, or inserting a taper pin.) The bolt was then torqued normally. I let the assembly dry be fore testing it for any movement. Solid.... I've flown over 100 Hours after that fix was performed, and still have no movement in the front gear leg upper mount area. I have checked it at ever y oil change for any signs of movement.... With the history of issues in this area, it would seem prudent to do the final front gear leg assembly with Lock-Tight on the upper mount area. This would prevent the re-occurring issue that we've seen in this area on the - A RV models.... And I've seen it happen to every RV-XA that I've owned.... __________________ Fred Stucklen RV-7A N924RV Flying RV-6A N926RV 875 Hrs (Sold) RV-6A N925RV 2008 Hrs (Sold) ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv-list Browse Digests http://www.matronics.com/digest/rv-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.