Rear brake issue - '85 LTD


Information and questions on GL1200 Goldwings (1984-1987)
  • Sponsored Links
Post Reply
User avatar
Phunnybone
Posts: 211
Joined: Mon May 28, 2012 3:48 am
Location: Rock Hill SC
Motorcycle: 1985 GL1200 LTD (undergoing re-assembly)
1985 GL1200 LTD (#2) (undergoing re-assembly)
1985 GL1200 LTD (#3)
Contact:

Rear brake issue - '85 LTD

Post by Phunnybone » Mon Oct 23, 2017 3:36 am



Front calipers were an easy rebuild, but when I got to the rear, the hanger pins for the brake pads are stuck (yes, I removed the bracket). Any suggestions on getting them out? At least it's still an available part if I mess one or both up.



User avatar
Rednaxs60
Posts: 1289
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD, 2008 GL1800

Re: Rear brake issue - '85 LTD

Post by Rednaxs60 » Mon Oct 23, 2017 9:55 am

I found the pins get stuck on the driving end - mushrooming effect. Knock the pins back in and try filing the ends. Had to do this several times to get the pins out of the front calipers.

I am going to replace the pins on my next service if I can find some. Make sure you use a small brush that fits the pin holes - something like in a gun cleaning kit. Moisture does get in between the pin and caliper case, and corrosion starts. I also take some fine sand paper/emery cloth and clean the pins before putting back in.

I'm also thinking that with these older GWs a service every year may be in order just to lube the pivot/slide pin and to make sure the pad pins are loose as well - do it on a rainy Saturday. I also have speed bleeders installed to make bleeding easier.

In your case with the number of '85 LTDs you have, it may be a full time service job. :lol: :lol: :lol:

Hope this helps.

Cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

User avatar
SilverDave
Posts: 467
Joined: Sun Aug 09, 2009 9:39 am
Location: Langley, BC
Motorcycle: 1985 GL1200 GoldWing Aspy

Re: Rear brake issue - '85 LTD

Post by SilverDave » Mon Oct 23, 2017 1:06 pm

Those pins are very soft metal, and do mushroom quite easily . The first time I found this, about 11 years ago, I had just purchased a digital caliber.
The hole they go into is 6.00 mm. My pins were from 6.05 to 6.13 over quite a length . No wonder they were stuck
I used an old phillips screwdriver, cut off, dia 5.8 mm to drive them out .

Solution #1 When you get them out .. trash them and get a new set from Honda .... :(

Solution #2 I own a multi speed drill press, and also a small lathe. With good quality emory cloth , you can easily spin them down, till they measure about 5.85 to 5.9 mm.along the entire length .( or less than 6.00 at the very least )

Good enough for a drop of oil to fill the gap .. They should slide in with just a little finger push .

Have Fun

SilverDave

User avatar
WingAdmin
Site Admin
Posts: 18226
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: Rear brake issue - '85 LTD

Post by WingAdmin » Thu Oct 26, 2017 6:44 pm

Yup, same thing happened with my 1100. I used a drift to pound them out of the calipers, then I spun them in a drill press and various grits sandpaper to bring them down to a diameter at which they would fit again.

User avatar
Phunnybone
Posts: 211
Joined: Mon May 28, 2012 3:48 am
Location: Rock Hill SC
Motorcycle: 1985 GL1200 LTD (undergoing re-assembly)
1985 GL1200 LTD (#2) (undergoing re-assembly)
1985 GL1200 LTD (#3)
Contact:

Re: Rear brake issue - '85 LTD

Post by Phunnybone » Thu Nov 02, 2017 5:36 pm

Took me a little while, but I got them out. Between WD40, heat, and use of a hammer, they came out. No drill press, but I have sanded them down some. Will prob put them in a drill chuck and do it a little faster.

The other issue I had was when I went to replace the rear brake line with an HEL line. Once I took the old line off, the flare nut wouldn't connect with the new line. Final solution was to cut off a little of the old line and put a new flare nut on and re-flare the line. That worked just fine, but I may end up doing the same thing to the hard line from the rear master cylinder to the right front.

User avatar
SilverDave
Posts: 467
Joined: Sun Aug 09, 2009 9:39 am
Location: Langley, BC
Motorcycle: 1985 GL1200 GoldWing Aspy

Re: Rear brake issue - '85 LTD

Post by SilverDave » Thu Nov 02, 2017 8:46 pm

Now that your pins are out, borrow a digital micrometer

.... and check them over their entire length to be less than 6.00 mmm... say down to 5.95 mm or less after sanding in a drill press

( Top to bottom !! )

SilverDave

User avatar
Phunnybone
Posts: 211
Joined: Mon May 28, 2012 3:48 am
Location: Rock Hill SC
Motorcycle: 1985 GL1200 LTD (undergoing re-assembly)
1985 GL1200 LTD (#2) (undergoing re-assembly)
1985 GL1200 LTD (#3)
Contact:

Re: Rear brake issue - '85 LTD

Post by Phunnybone » Fri Nov 03, 2017 10:43 am

Thx SilverDave - I would'v e forgotten to check that.

User avatar
Rednaxs60
Posts: 1289
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD, 2008 GL1800

Re: Rear brake issue - '85 LTD

Post by Rednaxs60 » Fri Nov 03, 2017 11:19 am

Just did my rear brake caliper. lubed up the slide pin (will replace next time) and had to sand and fit the pins. Going to get a brush set that will fit into the caliper holes to clean, thinking a gun cleaning kit will fit the bill. Lots of crud in the holes where the pins fit, need to clean these out.

Cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

User avatar
Phunnybone
Posts: 211
Joined: Mon May 28, 2012 3:48 am
Location: Rock Hill SC
Motorcycle: 1985 GL1200 LTD (undergoing re-assembly)
1985 GL1200 LTD (#2) (undergoing re-assembly)
1985 GL1200 LTD (#3)
Contact:

Re: Rear brake issue - '85 LTD

Post by Phunnybone » Mon Nov 06, 2017 3:01 pm

Got the pins out, stuck em in a cordless drill and got them down under 6mm. Now I have stuck pistons. Tried hooking up to a brake line - no go. Tried to get them out with air - no go. So now, I went ahead and filled them up with WD-40 to loosen the crud on them. Hopefully that'll work.

User avatar
Phunnybone
Posts: 211
Joined: Mon May 28, 2012 3:48 am
Location: Rock Hill SC
Motorcycle: 1985 GL1200 LTD (undergoing re-assembly)
1985 GL1200 LTD (#2) (undergoing re-assembly)
1985 GL1200 LTD (#3)
Contact:

Re: Rear brake issue - '85 LTD

Post by Phunnybone » Tue Nov 07, 2017 5:54 pm

Hurray! Got the pistons out. Couldn't get the hydraulics to push them out and air didn't work either. So, went the grease gun route - worked like a charm. Will just have to do extra cleaning on the caliper to make sure all the grease is gone.

User avatar
SilverDave
Posts: 467
Joined: Sun Aug 09, 2009 9:39 am
Location: Langley, BC
Motorcycle: 1985 GL1200 GoldWing Aspy

Re: Rear brake issue - '85 LTD

Post by SilverDave » Thu Nov 09, 2017 1:37 pm

The top 1/8 to 1/4 in of the pistons does nothing critical . ... the small clear ring spot just above the corrosion line .

You don't want to actually gouge it ... but I have found that if Hydraulic fluid pressure does not push them out .. I take a break... to think ...
Then clean that top 1/4 inch , and wrap a thin strip of quality cloth duct tape around it .
... them ... VERY careful use of slip lock pliers ( possibly with taped jaws ) on the stuck piston .
I start by moving it radially , back and forth to loosen it up. Usually Hydraulic pressure will then remove it .
If not, wiggle back and forth and pull outwards till it frees up . Maybe a wood pry block under the slip-locks to get some more leverage .

I always carefully examine the top edge after removal to be sure I have not scored or gouged it

Piston is going to be sanded anyway with 1000 grit till it shines anyway .

So far I have not damaged any pistons . This takes less time than cleaning grease out of entire caliber... but you have to be very careful ..

SilverDave



Post Reply