Front Brakes - 1980 GL1100 Interstate


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Front Brakes - 1980 GL1100 Interstate

Postby Wingsconsin » Fri Oct 12, 2012 2:44 pm



This would seem to be a really small thing...but it is bugging me...so I thought I would ask the experts....

The '80 front system uses a splitter valve to actuate both front brakes L & R.
I rebuilt both calipers and the Master cylinder and flushed new fluid through the entire system .
Steel braided brake lines also. Bleed with Miti-vac.
The calipers pump up and pressurize perfectly, and return nicely as well so they SHOULD work fine (and mostly do)
But ~~
When I am riding I can occasionally hear the pads rubbing the rotor (lightly?) and sometimes squeeking. A gentle tap of the lever (quick squeeze) can usually make them stop--for a while...
It seems the pads are floating in the caliper (they actually sit in a receiver of sorts with no top pins and the calipers wrap around them) and when I turn they might(?) be falling into the pads a bit...

For those with 1980's or others with this style brake system -- Does this seem normal...?

This week I rmoved the calipers, and made sure the shims(holders) were in place, and properly greased and all seemed right...
Since I did this I have not been able to get out for a ride -the weather has been poor and time is against me - but I wanted to get opinions on this from others with experience with these older Goldwings...

THANKS



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Re: Front Brakes - 1980 GL1100 Interstate

Postby WingAdmin » Fri Oct 12, 2012 3:17 pm

First off - that isn't a splitter valve, it's just basically a "T" junction to connect both calipers into a single master cylinder. No valve or any other mechanism inside there.

Next - did you install shims on the brake pads when you replaced them?

1980 GL1100 Front Pad
1980 GL1100 Front Pad

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Re: Front Brakes - 1980 GL1100 Interstate

Postby scotterichmond » Fri Oct 12, 2012 3:52 pm

do the calipers "slide" easily on their pins?

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Re: Front Brakes - 1980 GL1100 Interstate

Postby Wingsconsin » Fri Oct 12, 2012 4:13 pm

T junction ---yes agreed
Answers -
Shims in place as shown.
Calipers "slide" -- not so much really..This has me thrown a bit...The will slide if I leave the bolts loose(ish) but when I tighten them they do not slide..I suppose that is my answer...remove, clean and regrease (again) the slider bolt..
#17 & 18

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Re: Front Brakes - 1980 GL1100 Interstate

Postby scotterichmond » Fri Oct 12, 2012 4:17 pm

they do need to slide after they are tight. I would look deeper into this if it were me.

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Re: Front Brakes - 1980 GL1100 Interstate

Postby Wingsconsin » Fri Oct 12, 2012 5:02 pm

This has occured to me (and I will check it out)...
On the drawing above...
Parts # 24 & 26 seem to be the same as #23..? caliper mounting bolts...Right...?
If so...I do not remember the washers being there...(#26)..
That would cause an over tight condition....? yes...?
The bike came with some after market rotor & caliper covers.
I liked it better with out the caliper covers so I left them off..but I think now that the caliper covers acted as the sapecer (washer) too...
Hmmm....
I have something to do this weekend now...seeing as it's going to rain all day tomorrow & Sunday..
Thanks for helping me find my way...This may be the answer....
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Re: Front Brakes - 1980 GL1100 Interstate

Postby scotterichmond » Fri Oct 12, 2012 5:06 pm

# 23 are the bolts that hold the caliper halves together

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Re: Front Brakes - 1980 GL1100 Interstate

Postby Wingsconsin » Sat Oct 13, 2012 11:22 am

scotterichmond wrote:# 23 are the bolts that hold the caliper halves together


Makes perfect sense now...the washers (spacers#26) are not there when I removed the caliper covers..the covers act like the spacer it seems as this is the attachment point for the bracket.
No spacers = overtight..>Right...?
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Re: Front Brakes - 1980 GL1100 Interstate

Postby scotterichmond » Sun Oct 14, 2012 9:34 am

I think so, but I don't have them in front of me , so it is diffecult to sat for sure.

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Re: Front Brakes - 1980 GL1100 Interstate

Postby Wingsconsin » Sun Oct 14, 2012 10:11 am

scotterichmond wrote:I think so, but I don't have them in front of me , so it is diffecult to sat for sure.


I guess I wasn't really expecting you to know for sure...I just like "talking" it out...
:lol:

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Your results may vary. Universal disclaimers apply.


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scotterichmond
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Re: Front Brakes - 1980 GL1100 Interstate

Postby scotterichmond » Mon Oct 15, 2012 8:16 am

well then , you should keep talking it out , seem like it will help .It does for me




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