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
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 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 <saylor.dave@gmail.com> 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 <Tim@myrv10.com> 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
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 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 <philperry9@gmail.com>
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 <saylor.dave@gmail.com> 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 <Tim@myrv10.com> 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
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|