1800 rear brakes

Information and questions on GL1800 Goldwings (2001-2017)
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1800 rear brakes

Post by fanman7 » Sat Jun 11, 2011 10:00 am

I recently went riding on a very hot day. when all of a sudden my rear brakes started to lock up. Had to stop for a while and it would loosen up , but the problem recurred after another period of riding. Eventually found out the rear brake line was melting. Anyone else ran into a similar problem with their bike?

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Re: 1800 rear brakes

Post by wingfart » Sat Jun 11, 2011 2:42 pm

Brake fluid will expand from heat. The initial expansion may have been caused by the hot weather and may have caused the caliper to clamp the disk a bit more. Now you have a real good source of heat from brake pad/disk friction, causing a lot more expansion and more brake lock. Fluid expansion should be taken care of at the rear master cylinder where the fluid should back up into the reservoir. If for some reason this does not happen (Is the reservoir filled to the top? Orifice in reservoir blocked?) voila! I still don't understand why this would affect your brake lines, unless you are collecting exhaust heat somehow.

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Gl 1800 2003

Re: 1800 rear brakes

Post by FlyBoy2121 » Sat Jun 11, 2011 5:19 pm

I fanman7

I agree with WingFart.

If your oil tank is full, like you said it was very hot and oil expention takes to heat and is not too elastic, it has applied the brakes.
You should remove a little oil in your tank for a little room for expention. And redo a test when its hot.


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Re: 1800 rear brakes

Post by monkeebutt52 » Mon Jul 04, 2011 11:04 am

When was the last time you bled your brakes? Old fluid can attract moisture. Sounds like vapor lock to me!

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Steve F
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'03 GL1800

Re: 1800 rear brakes

Post by Steve F » Mon Jul 04, 2011 6:43 pm

A member from another GW forum had a similar porblem, and the mechanic told him it was probably due to moisture in the lines, and the moisture reaching or above the boiling point, vaporizing and expanding, which causes the brake to actuate. A total removal and thorough bleeding of all the old fluid is required. This also happens to clutches too, which causes slipping.

"To ride is the reason, the destination the excuse."

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