VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #1  
Old 09-10-2021, 01:29 PM
bernsbm bernsbm is offline
 
Join Date: Nov 2015
Location: Mequon, WI
Posts: 64
Default Brake fitting leakage.

Any thoughts on how to approach a leaking brake line fitting (see photo). The fitting was initially installed before the landing gear was mounted. Given the tight space, is it possible to get a wrench with decent leverage on the fitting, and if so, what type of wrench? If not, I will need to remove the gear to address the leak. I'm thinking removal and reinstallation of the fitting may be required. Thanks in advance!
Attached Thumbnails
Click image for larger version

Name:	IMG_1870.jpeg
Views:	187
Size:	60.9 KB
ID:	15672  
__________________
Barry Bernstein
N12BB RV12 Skyview flying since Oct 2016 (Sold)
N122B RV12iS Garmin flying since Oct 2020
https://eaabuilderslog.org/?s=bbernstein
2021 dues paid. Best bargain in aviation!
Reply With Quote
  #2  
Old 09-10-2021, 09:38 PM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 3,146
Default

The fittings on my master cylinders require periodic tightening. Usually about 1/8 turn.
Reply With Quote
  #3  
Old 09-11-2021, 02:04 PM
drill_and_buck's Avatar
drill_and_buck drill_and_buck is offline
 
Join Date: Feb 2005
Location: Bridgewater, MA - KPYM
Posts: 473
Default

Barry,
Lots of good discussion on this issue in the following thread: https://vansairforce.net/community/s...d.php?t=198437.

If it were my plane I would take a day, remove the gear and fix.
__________________
Mike Draper
RV-8 N468RV
First Flight 11/13/2011
TMX0360, Dual Pmags, CS

Last edited by drill_and_buck : 09-11-2021 at 02:08 PM.
Reply With Quote
  #4  
Old 09-11-2021, 03:38 PM
jrs14855 jrs14855 is offline
 
Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,589
Default Fitting

The information shown in post #4 will lead you to the previous discussions about how this can be done without removing the gear. In that case it was a Grove gear on a RV8.
As far as tools there are a couple of options. Remove the nylon line and fitting. Screw a nut on the 90 degree fitting and turn it with an open end wrench or even an adjustable wrench, starting with the wrench on the nut.
Second option is to cut off the end of a cheap open end wrench and weld on a flat steel bar at a 90 degree angle. It may be necessary to create two wrenches with different angles.
Another alternative is to cut off the end of the 90 degree fitting and remove the remaining piece with vice grips. In that case replace the 90 degree fitting with a 90 degree street elbow and appropriate straight fitting for the nylon line.
The street elbows are automotive or industrial fittings
Reply With Quote
  #5  
Old 09-12-2021, 08:45 AM
TS Flightlines TS Flightlines is offline
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,893
Default

Barry, you just might have enough room to tighten the fitting. The compession fittings use with the plastic hose are alittle shorter on the hose side, so it just might clear the the roof and the side so you remove it, reseal it, and reinstall getting it tight. A really good open end wrench with a wide face, but NOT a large head area may clear. Probable have to make that wrench. Hello bench grinder.
Make sure to use a really good sealer, and get it tight.

Tom
__________________
Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7A Tail Kit Completed, Fuse started-Pay as I go Plan, on hold while we develop new products for RV builders
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
Reply With Quote
  #6  
Old 09-12-2021, 09:12 PM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 3,146
Default

I cut down a box end wrench to tighten my brake fittings under the wing box bulkhead.
Reply With Quote
  #7  
Old 09-14-2021, 05:44 AM
bernsbm bernsbm is offline
 
Join Date: Nov 2015
Location: Mequon, WI
Posts: 64
Default

Thanks for all the information, links and ideas on how to address the leaking fitting. Still deciding which way I'll approach the issue (literally and figuratively). With my first condition inspection coming up, I'm leaning towards removing the gear leg to fix the leak.

Might want to assemble a few of the suggested wrenches for use down the road!
__________________
Barry Bernstein
N12BB RV12 Skyview flying since Oct 2016 (Sold)
N122B RV12iS Garmin flying since Oct 2020
https://eaabuilderslog.org/?s=bbernstein
2021 dues paid. Best bargain in aviation!
Reply With Quote
  #8  
Old 09-14-2021, 10:58 AM
NinerBikes NinerBikes is offline
 
Join Date: Dec 2018
Location: Granada Hills
Posts: 1,191
Default

Quote:
Originally Posted by bernsbm View Post
Thanks for all the information, links and ideas on how to address the leaking fitting. Still deciding which way I'll approach the issue (literally and figuratively). With my first condition inspection coming up, I'm leaning towards removing the gear leg to fix the leak.

Might want to assemble a few of the suggested wrenches for use down the road!
If you haven't already, you might want to consider painting the gear legs while they are off of the plane, to prevent corrosion.
__________________
Donated
RV-12, KWHP based

"Time to Spare, go by Air."
Reply With Quote
  #9  
Old 09-14-2021, 04:56 PM
fr0gpil0t fr0gpil0t is offline
 
Join Date: Apr 2013
Location: Colorado Springs
Posts: 72
Default

Barry

I have recent experience of this fitting and would recommend removing the gear leg. I noticed a leak there and it is possible to remove the fitting from the gear leg. But what neither I or my partner could do is get the AN fitting started as we tried to put it back in. We could not get our hand at the right angle to do that one turn to get the first thread started before getting a wrench on it. On top of that you have sealant on the threads so you will get that all over the gear leg or you.

I'm still in the building process but it probably took 30 mins to remove the tank and get the leg out and then another 45 mins to put it back and torqued correctly vs the 1.5 hour we wasted getting the fitting out and our attempt to get it back in.

I'm still having problems getting the fitting to be leak free at the base of the gear leg but will post on a separate thread.

Robert
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 11:05 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.