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
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| Subject: | 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
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| Subject: | 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
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| Subject: | Re: 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)
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