VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 03-19-2019, 11:51 AM
fbrewer fbrewer is offline
 
Join Date: Sep 2017
Location: Leander
Posts: 92
Default Leaky Brake Fittings

OK, so we have leaky fittings on the right side brakes.



We've tried tightening the plastic fittings without stripping the threads -- no dice. Still leaks.

I think I want to replace the semi clear tubing and replace with the black hose and new fittings. Where is the best place to buy these replacement parts?

Any other suggestions to my leaky brake fitting problems?

Last edited by fbrewer : 03-19-2019 at 11:56 AM.
Reply With Quote
  #2  
Old 03-19-2019, 12:11 PM
TS Flightlines TS Flightlines is offline
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,322
Default

you could up grade to teflon and save some weight over the H8794 black hoses
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
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
Reply With Quote
  #3  
Old 03-19-2019, 12:19 PM
fbrewer fbrewer is offline
 
Join Date: Sep 2017
Location: Leander
Posts: 92
Default

Tom,

I see on your website dual brake hose kits. Are those hoses stainless braid Teflon hose?

What is the cost of the kit?
Reply With Quote
  #4  
Old 03-19-2019, 12:23 PM
pazmanyflyer's Avatar
pazmanyflyer pazmanyflyer is online now
 
Join Date: Jul 2007
Location: Litchfield Park, AZ
Posts: 910
Default

Quote:
Originally Posted by fbrewer View Post
OK, so we have leaky fittings on the right side brakes.

We've tried tightening the plastic fittings without stripping the threads -- no dice. Still leaks.

I think I want to replace the semi clear tubing and replace with the black hose and new fittings. Where is the best place to buy these replacement parts?

Any other suggestions to my leaky brake fitting problems?
If your looking just to replace the plastic fittings then call Vans and order their F69-F-04X02 brass elbow brake assembly. Mine is a -7 but this shouldn't matter as I think all Vans planes use these. See upper left corner of build sheet for specifics.



Here's the link to zoom in.
https://photos.google.com/album/AF1Q...Rz04O4J18QNJvW
__________________
Carlos in Arizona
EAA Chapter 538 President, www.538.eaachapter.org
Wittman Tailwind W8 N53CH (built & sold)
Pazmany PL-1 N2029 (bought & sold)
RV7 - N537TC (reserved & building)
Emp, Wings & Fuse done - working on FWF

"The air is an extremely dangerous, jealous and exacting mistress. Once under the spell most lovers are faithful to the end, which is not always old age." - Winston Churchill
Reply With Quote
  #5  
Old 03-19-2019, 12:48 PM
Mel's Avatar
Mel Mel is offline
 
Join Date: Mar 2005
Location: Dallas area
Posts: 10,364
Default

The nylon tubing works fine, but the brass fittings work MUCH better than the plastic.
IMO the plastic fittings should be used only on the reservoir (non-pressurized) side.
Also, when using the brass fittings, don't forget the brass inserts. They are a VERY important part of the fitting.
__________________
Mel Asberry..DAR since last century
A&P/EAA (LifeTime) Tech Counselor/Flight Advisor/Nat'l Test Pilot School
Specializing in Amateur-Built and Light-Sport Aircraft
<rvmel(at)icloud.com>
North Texas (8TA5)
RV-6 Flying since 1993, 172hp O-320, 3-Blade Catto (since 2003)Sold
Legend Cub purchased 12/2017
FRIEND of the RV-1
Eagle's Nest Mentor
Recipient of Wright Brothers "Master Pilot" Award

Last edited by Mel : 03-19-2019 at 12:52 PM.
Reply With Quote
  #6  
Old 03-19-2019, 01:34 PM
sjhurlbut sjhurlbut is offline
 
Join Date: Jan 2005
Posts: 643
Default Brake Lines

I never use plastic lines after multiple issues in the past. Its very cheap to upgrade to flexible AN3 pre made hoses. Give Tom at TSFlightlines a call. Ask for AN3 fittings with narrow brake lines. Easy upgrade and trouble free forever.

Heres a pic from a while ago. I use Grove reservoirs mounted to pedals.

__________________
"Aerodynamics is for people who can't build engines"
Enzo Ferrari

Steve H
Cold Lake, Alberta
RV7A #70015 - C-FZQX - built - sold
RV7A #71629 - C-FSIS - built - sold across Atlantic
RV7 #70215 - C-GOJU - flying - sold
RV7 #70703 - C-GMIY - flying - sold
RV6 #60119 - C-FHBZ - built - Airventure 2016 Bronze Lindy - sold
RV10 #41779 - built emp - sold
RV8 #82842 - C-FSBG - Fastback with big hp IO-360-A1B6 10:1 - built - flying
Reply With Quote
  #7  
Old 03-19-2019, 01:58 PM
snopercod's Avatar
snopercod snopercod is offline
 
Join Date: Aug 2016
Location: Asheville, NC
Posts: 1,834
Default

Quote:
Originally Posted by Mel View Post
The nylon tubing works fine, but the brass fittings work MUCH better than the plastic.
What Mel said! Going one step further, I recommend the Parker Brass Compression Fittings with the hex nuts rather than the knurled ones. ACS calls them "SAE fittings". Definitely use the inserts, which come in different diameters depending upon the wall thickness of your tubing.
__________________
(2019 dues paid)
Reply With Quote
  #8  
Old 03-19-2019, 07:58 PM
rapid_ascent rapid_ascent is offline
 
Join Date: Mar 2008
Location: Dublin, CA
Posts: 1,058
Default

Hey Frank,

I'm building braided lines for my brake lines. I think I probably have the brass fittings that you need that came with my kit. PM me with what you think you need. I'll check what I have when I'm out at my hangar this weekend. I can drop them in the mail to you.

Ray
__________________
Ray Tonks
2018 Donation Paid
Titan IOX-370 on order
RV-7 Fuselage in progress
* Cabin Interior - In progress
RV-7 SB Wings
* Both Wings fully skinned
* Fuel Tanks Complete - No leaks finally
* Ailerons Complete
* Flaps Complete
RV-7 Empennage - Complete (a little fiberglass work left)
Vans Training Kit # 2 - Complete
Shop Setup - In Progress (Gathering Tools, Never Complete)
RV-7 Preview Plans
Vans Training Kit #1 - Complete
EAA Sheet Metal Class - Complete
Reply With Quote
  #9  
Old 03-20-2019, 08:24 PM
RViter RViter is offline
 
Join Date: Jun 2009
Location: Mesa, AZ
Posts: 232
Default

Quote:
Originally Posted by Mel View Post
Also, when using the brass fittings, don't forget the brass inserts. They are a VERY important part of the fitting.
What Mel said... I missed that detail 'once' and found out quickly they leak.
__________________
gary
RV-6A QB Tip-Up, 1st Flight 3/18/17
O-360-J2A (modified & F/I), Sensenich FP (cruise)
VP-X Sport, Dynon SkyView, VFR day
(FFZ) Mesa, AZ - N234GB -
www.mykitlog.com/garyc
Reply With Quote
  #10  
Old 03-20-2019, 11:26 PM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 4,137
Default

Quote:
Originally Posted by Mel View Post
The nylon tubing works fine, but the brass fittings work MUCH better than the plastic.
IMO the plastic fittings should be used only on the reservoir (non-pressurized) side.
Also, when using the brass fittings, don't forget the brass inserts. They are a VERY important part of the fitting.
Those two lines have no pressure other than gravity induced. However, there is constant movement of the tubing and those plastic fitting are simply not up to the task. Those plastic fittings seal via an oring that has probably dried up and shrunk. The simple fix is to replace the orings. However, I would recommend replacement with the specified brass fitting with ferrules and inserts.

Larry
__________________
N64LR
RV-6A / IO-320, Flying as of 8/2015
RV-10 in progress

Last edited by lr172 : 03-20-2019 at 11:29 PM.
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 06:28 PM.


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.