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| Re: Stubborn Brake Lines [message #311818 is a reply to message #311812] |
Wed, 04 January 2017 07:51   |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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Russell K. wrote on Wed, 04 January 2017 06:38I'm in the process of replacing all of the brake components. Some of the brake line fittings are very challenging to remove. I've been using liquid wrench with limited success. Below are pictures of my proportioning valve. I have the parts in hand, so maybe I should just cut the lines. Anyone have a silver bullet for stubborn brake lines?
<pictures cut>
Russell,
For penetrant, Make you own. Here is the whole story.
Years back, a magazine "Machinist Workshop"(?) decided to do an article about penetrating lubricants.
They bought samples of everything that they could find.
They made up some carefully corroded assemblies and got test instruments together.
And then someone said that to be a proper engineering study, they should have an easily reproducible baseline.
Well, a participant suggested that his father had always used a 50/50 of acetone and ATF. - Great
That was the test baseline. They collected data.
Problem: In such a test, your would like the baseline to be in the middle of the population.....
The homebrew was WAY of the end of the data to the better side....
OK, they published the article anyway. This was about 10 years ago.
Jon is correct about those vice grips. (Ask JimK, he got to use mine at Mansfield.)
Actually, if you buy the whole set, you will never regret the money spent.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: Stubborn Brake Lines [message #311820 is a reply to message #311818] |
Wed, 04 January 2017 08:02 |
Russell K.
Messages: 178
Registered: October 2016
Location: Dunedin, Florida
Karma: 4
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Senior Member |
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Thank you Matt.
50/50 acetone and tranny fluid. Wow, who knew?
I am going to find a set of those special vice grips.
1978 Eleganza II, Dunedin, Florida
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| Re: Stubborn Brake Lines [message #311822 is a reply to message #311812] |
Wed, 04 January 2017 08:30 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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The problem is not turning the nut. That's easy. The problem is getting the tube to break free from the nut and not twist like a watch spring.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Stubborn Brake Lines [message #311828 is a reply to message #311823] |
Wed, 04 January 2017 10:49 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Depending upon where the fittings are located, several methods will work.
Around the distribution valve where the lines are short, figure on
replacing them. It is easier than fighting a day or more to free up rusted
lines. In the rear of the coach on the wheel cylinders, use penetrant, and
a very high quality fitting wrench. If the fitting breaks free of the
cylinder, remove the bolts holding it and unscrew the cylinder while
holding the fitting from turning. Then, use a bernz o matic torch and
alternately heat and qwench the fitting on the line until it breaks free.
Waaaaay better than fighting to replace those rear brake lines. Spend a
little time now, save a lot later. Just a couple of tricks I use.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Jan 4, 2017 8:37 AM, "Kingsley Coach" wrote:
Heat fitting red hot with a torch, dump a cup of water on it. Twist out
with a wrench.
Mike in NS...land of rust and salted winter roads
On Wed, Jan 4, 2017 at 11:40 AM, Russell Keith wrote:
> Thank you John and Mr. Fisher
> --
> Russell Keith
>
> 1978 Eleganza II
>
> Dunedin, Florida
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS
Life is too short to hold a grudge; slash some tires and call it even !
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| Re: [GMCnet] Stubborn Brake Lines [message #311835 is a reply to message #311827] |
Wed, 04 January 2017 15:06 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Kingsley Coach wrote on Wed, 04 January 2017 10:36Heat fitting red hot with a torch, dump a cup of water on it. Twist out
with a wrench.
Mike in NS...land of rust and salted winter roads
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS
Life is too short to hold a grudge; slash some tires and call it even !
I do the same ting EXCEPT I do not heat them to read hot. I quench them with Kroil, acetone/trans fluid, or PB blaster. Allow them to cool a while soaking with Kroil, etc. You may have to do it more than once.
The problem is getting the penetrating oil in between the line and the nut. That is why I like some good penetrating oil for quenching and soaking rather than water. Keep the torch away from the fitting when you quench them or the penetrating oil will ignite. I have never had to cut or replace a steel line doing it this way.
Coat the line under the nut with anti-seize when reinstalling and next time you will not have the problem.
The special Irwin vice grips mentioned earlier are a great help.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
[Updated on: Wed, 04 January 2017 15:07] Report message to a moderator |
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