'81 GL1100 Rear Brake Fluid Reservoir


Information and questions on GL1100 Goldwings (1980-1983)
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rkmason
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'81 GL1100 Rear Brake Fluid Reservoir

Postby rkmason » Wed Oct 08, 2014 4:16 pm



I'm in the middle of reassembling my newly rebuilt rear brakes. Just found that the fluid reservoir is plugged up at the outlet and will not drain at all. My question is; does the fluid reservoir have a screen / strainer at the outlet? I was about to run a drill bit thru the outlet to open it up, but I wanted to check first in case it's actually a screen at the outlet that just needs clearing. I can't tell for sure looking at it. Thx



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WingAdmin
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Re: '81 GL1100 Rear Brake Fluid Reservoir

Postby WingAdmin » Wed Oct 08, 2014 10:03 pm

rkmason wrote:I'm in the middle of reassembling my newly rebuilt rear brakes. Just found that the fluid reservoir is plugged up at the outlet and will not drain at all. My question is; does the fluid reservoir have a screen / strainer at the outlet? I was about to run a drill bit thru the outlet to open it up, but I wanted to check first in case it's actually a screen at the outlet that just needs clearing. I can't tell for sure looking at it. Thx


Nope, no strainer or screen, it's just a reservoir with a nipple that a hose clamps onto.

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Oldbear
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Re: '81 GL1100 Rear Brake Fluid Reservoir

Postby Oldbear » Thu Oct 09, 2014 12:32 am

Check the condition of the hose (if you didn't already). They can look great on the outside, but swell and fall apart on the inside.
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rkmason
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Re: '81 GL1100 Rear Brake Fluid Reservoir

Postby rkmason » Thu Oct 09, 2014 8:42 am

Thanks. I pushed the obstruction out of the reservoir outlet. Not sure how that blockage got there; the whole system had no fluid in it at all. I guess strange things happen after 18 years of settting unused....

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Re: '81 GL1100 Rear Brake Fluid Reservoir

Postby RBGERSON » Thu Oct 09, 2014 8:44 am

Don't drill..pick with needle and there are two holes a smaller one next to the "big" one clean both smaller is the return if not open brake will stay locked. try a solvent or brakes clean just not on the rubber stuff in the plunger arm.
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rkmason
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Re: '81 GL1100 Rear Brake Fluid Reservoir

Postby rkmason » Thu Oct 09, 2014 8:55 am

RBGERSON wrote:Don't drill..pick with needle and there are two holes a smaller one next to the "big" one clean both smaller is the return if not open brake will stay locked. try a solvent or brakes clean just not on the rubber stuff in the plunger arm.

You are referring to the rear master cylinder; I am talking about the plastic rear fluid reservoir that is attached to the master cylinder by a hose. My fluid reservoir outlet was plugged up by something. I've already cleaned and rebuilt the master cylinder.

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Oldbear
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Re: '81 GL1100 Rear Brake Fluid Reservoir

Postby Oldbear » Sat Oct 11, 2014 6:07 pm

Any luck yet? The bottom of the tank should be wide open.
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rkmason
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Re: '81 GL1100 Rear Brake Fluid Reservoir

Postby rkmason » Sun Oct 12, 2014 10:32 am

Oldbear wrote:Any luck yet? The bottom of the tank should be wide open.

I ended up pushing a semi-solid plug of something out of the reservoir outlet. No idea what the plug was; the rear brake system was completely empty of fluid both above and below the plug.

I guess odd things happen when motorcycles set unused for 18 years.

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Oldbear
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Re: '81 GL1100 Rear Brake Fluid Reservoir

Postby Oldbear » Sun Oct 12, 2014 1:45 pm

I'm baffled as to what that could be made of, I image that brake fluid will change state as it collects moisture. I'd be replacing the hose; anything that collected into a "plug" may also have collected elsewhere. Was there similar debris in the master when you rebuilt it?
My wife is the greatest - she won't let me sell my bike - I'm less grumpy when I ride...

rkmason
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Re: '81 GL1100 Rear Brake Fluid Reservoir

Postby rkmason » Sun Oct 12, 2014 2:17 pm

Oldbear wrote:I'm baffled as to what that could be made of, I image that brake fluid will change state as it collects moisture. I'd be replacing the hose; anything that collected into a "plug" may also have collected elsewhere. Was there similar debris in the master when you rebuilt it?

The only thing I found in the master cyl was crystallized brake fluid around the piston in the volume between the two rubber cups. I found nothing similar in any other part of the system. I am replacing the hose between the reservoir and master cyl.




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