Front brake reservoir


Information and questions on GL1100 Goldwings (1980-1983)
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lowmanj
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Front brake reservoir

Postby lowmanj » Sat Jan 15, 2011 6:44 pm



I found and read previous posts on rebuilding the front master cylinder. Great help, as I need to do just that this weekend.

However, I can find no directions on how to remove and replace the actual plastic reservoir. I bought a new one. It came with just a rubber o-ring. For the life of me I can't get the old one to come out, and so have no idea how the new one would be installed correctly.

If I missed a post cover that, please steer me to it.
Thanks very much.



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virgilmobile
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Re: Front brake reservoir

Postby virgilmobile » Sat Jan 15, 2011 9:31 pm

I had to rebuild mine (front brake would seize up) master cyl did not bleed off the pressure. It came off with a bunch of twisting And prying. The " O " ring had it stuck pretty tight.Look verrrry closely,about 3/8" in front of the main feed hole there is a bleeder hole.It's very small,but must be clear.smaller than a sewing needle.

lowmanj
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Re: Front brake reservoir

Postby lowmanj » Sat Jan 15, 2011 11:12 pm

Thanks very much. I didn't want to just muscle it out, not knowing if that was called for. I'll try that bleeder hole too. It might release some suction.

I presume installing it involves simply pressing it into the body with the new o-ring. Is that right?
Thanks for the quick and hepful response too.

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MJSantos
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Re: Front brake reservoir

Postby MJSantos » Sun Jan 16, 2011 9:36 am

The small hole they are talking about looks like the one in the phote VERY SMALL. When you get ready to reseat the reservoir use a little vaselene to lube the oring, heps it getting it back together without rolling it.
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lowmanj
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Re: Front brake reservoir

Postby lowmanj » Sun Jan 16, 2011 8:44 pm

It was tough to get out, as you said. I hope I can get the master cylinder body looking as clean as the one in your photo.
I expect the rebuild key next week. I'll wait on installing reservoir until I do it all together.
I'll use the vaseline as advised then.
Thanks very much.

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WingAdmin
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Re: Front brake reservoir

Postby WingAdmin » Mon Jan 17, 2011 10:19 am

You can see the small hole that needs to be cleared here:

Image

I did not remove the reservoir when I wrote How to rebuild your front master cylinder, but like mentioned here, it just takes a lot of twisting and effort to remove. It's been in there for a long time!

lowmanj
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Re: Front brake reservoir

Postby lowmanj » Mon Jan 17, 2011 8:23 pm

Long time indeed. Crud and corrosion looks lie 30 years worth. I see the small hole. It is tiny, like a hole inside another.
The reservoir is out. I finally got the snap ring out today, and pistion won't come out. It will push in with much force. I've hit it hard with brake cleaner and penetrating oil.
Hate to just muscle it out with vice grips. I know that aluminum cylinder body can be scored pretty easily.
Any tips?
Thanks.

Also, what paint might dress up the master cylinder? Much black paint was removed with exposure to brake fluid over time.
Whats the best way to clean up the aluminum before reassembling the master cylinder?

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WingAdmin
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Re: Front brake reservoir

Postby WingAdmin » Mon Jan 17, 2011 9:38 pm

Are you replacing the piston? Most of the rebuild kits come with a new piston, so if you have a replacement, just clamp a slide hammer or other brute force tool and knock the old one out. You just don't want to score the inner wall of the cylinder, obviously.

You could try soaking in solvent, I suppose, to try to dissolve some of the crud, and see if it loosens up at all.

lowmanj
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Re: Front brake reservoir

Postby lowmanj » Tue Jan 18, 2011 1:18 pm

Yes, I'll replace the piston and all "innards". Been soaking for a few days now, and not getting much looser. I'll have to be a bit more aggressive in pulling it out now.

It was REALLY bad. The fluid all ran out of dried up over the 7 year park. Left behind some kind of mess. Brake cleaner and light scraping is doing wonders.

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MJSantos
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Re: Front brake reservoir

Postby MJSantos » Tue Jan 18, 2011 2:23 pm

Mine was so bad that what I did, was take a flat headed punch and go through the brake line end. It's a straight shot to the plunger. Gave it a hit and out it popped from the other side. Just make sure you centered on it so you don't score the cylinder wall and the c-clip is out. As far as painting I'm doing mine with caliper paint. Figured if it's tough enough to be in that enviorment with brake fluid, then it should work for the master too.

lowmanj
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Why Trans Fluid?

Postby lowmanj » Tue Jan 18, 2011 3:38 pm

Why is it recommended to lube brake components with ATF on installation? Why not brake fluid?
Just curious.
Thanks

Also, thanks for the punch tip. I'll look for that paint at the parts shop too.

UPDATE: The punch at the hose inlet did the trick. Just getting it cleaned well till kit arrives tomorrow or next day.
Thanks

lowmanj
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Re: Front brake reservoir

Postby lowmanj » Tue Jan 18, 2011 8:44 pm

Just thought I'd mention this; I got into my tackle box and straightened out a bream fish hook. With a pliers for a firm grip, the barbed end of the straightened hook made short work of that smallest hole.
Then I cut off the barbed end to ream out the larger hole with the shaft of the hook.
Give it a try.
Beats looking all over the garage for a wire small and stiff enough for the job.
Thanks

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WingAdmin
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Re: Front brake reservoir

Postby WingAdmin » Tue Jan 18, 2011 10:06 pm

Excellent idea about the fish hook - you might want to post a message on the how-to thread mentioning that idea!

The reason I use ATF instead of brake fluid for lubrication is because the brake fluid is extremely hydroscopic, will damage paint quickly if dripped onto it, and will destroy ABS (i.e. every piece of plastic on our bikes) if spilled onto it. ATF will do none of these things, is much cheaper, and works just as well.

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MSGT-R
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Re: Front brake reservoir

Postby MSGT-R » Wed Jan 19, 2011 10:08 am

lowmanj wrote:Yes, I'll replace the piston and all "innards". Been soaking for a few days now, and not getting much looser. I'll have to be a bit more aggressive in pulling it out now.

It was REALLY bad. The fluid all ran out of dried up over the 7 year park. Left behind some kind of mess. Brake cleaner and light scraping is doing wonders.


Have you considered just "trading up" to the Randakk master cylinder? With one of those and some steel braided lines, you'll stop so well you'll be doing nose prints on the windshield!

http://www.randakks.com/Brake%20Parts.htm

I have this set up and am very glad I did it!
Don't spook the road sheep.

lowmanj
Posts: 52
Joined: Thu Dec 30, 2010 7:42 pm
Location: Merritt Island, FL
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Re: Front brake reservoir

Postby lowmanj » Wed Jan 19, 2011 10:52 pm

Thanks for explaining the ATF as lube/ primer for the cylinder innards. I looked at the Randakk set up. Had I not already bought parts I'd probably go that route this time. I got a kick out of the "nose on the windshield" line. Thanks all.

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virgilmobile
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83 GL1100 standard
84 GL 1200 I

Re: Front brake reservoir

Postby virgilmobile » Thu Jan 20, 2011 12:26 pm

The steel braid line is a good idea,my 30 year old lines would expand and the lever felt mushy.good fix.

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MSGT-R
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Re: Front brake reservoir

Postby MSGT-R » Thu Jan 20, 2011 1:15 pm

Steel lines are good, the addition of the sport bike master cylinder is better!


Don't spook the road sheep.


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