---------------------------------------------------------- RV10-List Digest Archive --- Total Messages Posted Thu 11/16/17: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:40 AM - Re: Unservicable bearing cups (Phillip Perry) 2. 08:22 PM - Re: Unservicable bearing cups (David Saylor) ________________________________ Message 1 _____________________________________ Time: 10:40:15 AM PST US From: Phillip Perry Subject: Re: RV10-List: Unservicable bearing cups Dave, Do you recall which grease you were using while the airplane set? Just curi ous as I=99m getting ready to repack (hopefully not replace!) my beari ngs. I=99ve got Aeroshell 5 in them now. The supplied wheels and bearings f rom Cleveland had Mobil SHC 100 installed in them from the factory. I=99m wanting to look at the corrosion inhibitors in each available gr ease going forward. Thanks, Phil Sent from my iPhone > On Nov 11, 2017, at 6:40 PM, David Saylor wrote: > > Ya l think ya got it narrowed down there ;-). > > It was parked for engine work for spring/summer 2016. It sat in a hangar i n San Jose, so probably less salt air than Watsonville but still maybe some. I=99ve heard the rule of thumb is within 30 miles of salt water. But then it=99s lived at WVI since 2007 without any real corrosion anywhe re to speak of. > > The marks aren=99t gonna polish out. They=99re significant. > > =94Dave > >> On Sat, Nov 11, 2017 at 3:21 PM Tim Olson wrote: >> >> Thanks for posting the pics and part number recap for the people who want to >> save this for future reference! >> >> Those marks almost have to not be from USAGE wear, but from sitting wear. >> Notice how they are only on 1/2 of the race...that seems to indicate, >> in my non-expert opinion, that either that is the side that all the weigh t >> was on, or that was the side that had not much weight and therefore >> had enough of a gap that moisture got in. >> >> I would think that these went bad strictly from sitting too long with >> moisture around. Was this still somewhat near the ocean? >> I bet if you had flown regularly you wouldn't have seen this. >> >> The unevenness of the marks also make me wonder if maybe the >> bearings were just slightly loose. That's just thinking out loud...not >> that I'd advise you to do anything different. >> >> Anyway, very interesting. If you scotchbrite those marks, do they polish >> off? I wonder how deep they go. >> Tim >> >> On 11/11/2017 12:21 PM, David Saylor wrote: >> > Here's a picture of some of the cups I just changed. I change them >> > when they have even just one of the marks on the inner surface. So >> > obviously these are toast. >> > >> > My plane sat in 2016 from April to October. I suspect that may have >> > something to do with these marks. I'll be paying closer attention >> > next year. All the bearings in both MLGs and one side of NLG were >> > replaced. >> > >> > The rollers had corresponding marks. >> > >> > PNs for future reference: >> > >> > MLG >> > Timken LM29749 Cone (the part with the rollers) >> > Timken LM29710 Cup (the part pressed into the wheel) >> > Add "20629" or "2-629" the end of the PN for FAA approved parts >> > >> > NLG >> > Timken LM67000LA Cone >> > Timken LM67010 Cup >> > (as listed on the MATCO drawing) >> > >> > >> > --Dave >> >> >> ========== >> -List" rel="noreferrer" target="_blank">http://www.matronics.com/Navi gator?RV10-List >> ========== >> FORUMS - >> eferrer" target="_blank">http://forums.matronics.com >> ========== >> WIKI - >> errer" target="_blank">http://wiki.matronics.com >> ========== >> b Site - >> -Matt Dralle, List Admin. >> rel="noreferrer" target="_blank">http://www.matronics.com/contributio n >> ========== >> >> >> ________________________________ Message 2 _____________________________________ Time: 08:22:34 PM PST US From: David Saylor Subject: Re: RV10-List: Unservicable bearing cups I had Shell 5 in the mains and SHC100 in the nose. The nose failed one of the two. All the mains failed. --Dave On Thu, Nov 16, 2017 at 10:38 AM, Phillip Perry wrote: > Dave, > > Do you recall which grease you were using while the airplane set? Just > curious as I=99m getting ready to repack (hopefully not replace!) m y bearings. > > I=99ve got Aeroshell 5 in them now. The supplied wheels and bearin gs from > Cleveland had Mobil SHC 100 installed in them from the factory. > > I=99m wanting to look at the corrosion inhibitors in each available grease > going forward. > > Thanks, > Phil > > > Sent from my iPhone > > On Nov 11, 2017, at 6:40 PM, David Saylor wrote: > > Ya l think ya got it narrowed down there ;-). > > It was parked for engine work for spring/summer 2016. It sat in a hangar > in San Jose, so probably less salt air than Watsonville but still maybe > some. I=99ve heard the rule of thumb is within 30 miles of salt wa ter. But > then it=99s lived at WVI since 2007 without any real corrosion anyw here to > speak of. > > The marks aren=99t gonna polish out. They=99re significant. > > =94Dave > > On Sat, Nov 11, 2017 at 3:21 PM Tim Olson wrote: > >> >> Thanks for posting the pics and part number recap for the people who wan t >> to >> save this for future reference! >> >> Those marks almost have to not be from USAGE wear, but from sitting wear .. >> Notice how they are only on 1/2 of the race...that seems to indicate, >> in my non-expert opinion, that either that is the side that all the weig ht >> was on, or that was the side that had not much weight and therefore >> had enough of a gap that moisture got in. >> >> I would think that these went bad strictly from sitting too long with >> moisture around. Was this still somewhat near the ocean? >> I bet if you had flown regularly you wouldn't have seen this. >> >> The unevenness of the marks also make me wonder if maybe the >> bearings were just slightly loose. That's just thinking out loud...not >> that I'd advise you to do anything different. >> >> Anyway, very interesting. If you scotchbrite those marks, do they polis h >> off? I wonder how deep they go. >> Tim >> >> On 11/11/2017 12:21 PM, David Saylor wrote: >> > Here's a picture of some of the cups I just changed. I change them >> > when they have even just one of the marks on the inner surface. So >> > obviously these are toast. >> > >> > My plane sat in 2016 from April to October. I suspect that may have >> > something to do with these marks. I'll be paying closer attention >> > next year. All the bearings in both MLGs and one side of NLG were >> > replaced. >> > >> > The rollers had corresponding marks. >> > >> > PNs for future reference: >> > >> > MLG >> > Timken LM29749 Cone (the part with the rollers) >> > Timken LM29710 Cup (the part pressed into the wheel) >> > Add "20629" or "2-629" the end of the PN for FAA approved parts >> > >> > NLG >> > Timken LM67000LA Cone >> > Timken LM67010 Cup >> > (as listed on the MATCO drawing) >> > >> > >> > --Dave >> >> >> ========== >> -List" rel="noreferrer" target="_blank">http://www. >> matronics.com/Navigator?RV10-List >> ========== >> FORUMS - >> eferrer" target="_blank">http://forums.matronics.com >> ========== >> WIKI - >> errer" target="_blank">http://wiki.matronics.com >> ========== >> b Site - >> -Matt Dralle, List Admin. >> rel="noreferrer" target="_blank">http://www.matronics.com/contributi on >> ========== >> >> >> >> ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv10-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV10-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/rv10-list Browse Digests http://www.matronics.com/digest/rv10-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.