Re-building Calipers


Information and questions on GL1500 Goldwings (1988-2000)
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Seo
Posts: 6
Joined: Mon Jul 01, 2013 10:32 am
Location: Homosassa
Motorcycle: 1999 Goldwing 1500 SE

Re-building Calipers

Post by Seo » Thu Feb 28, 2019 11:51 am



I’m working on my 1998 SE, updating break pads. After removing the breaks and looking at the calipers they too needed re-building. So working from the left rear to the left front cleaning the calipers, then re-placing the piston rubber rings and pistons and finally bleeding the break oil I then moved to the right front side.
When I removed the break and caliper, I for some reason did not look at the break oil and breeder valve. I simply remover the caliper and set it aside while I cleaned the disc, wheel and then took the caliper apart and cleaned it, replacing the rubber oil rings and new pistons. That done I replaced the break on the disc and began to purge and replace the oil from the reservoir down. It was thenInoticed the intake from the reservoir to the break was lover then the bleeder.
Now, I am not a great mechanic or a professional by any stretch of the imagination. I thoug I remembered on disc break replacements that normally the bleeder is lower on the caliper (lower to the ground) than the break oil intake; allowing gravity and easier bleeding. IS this not normal on the 1500 breaks? I’ve looked at the how to on caliper and how too on Front break pad replacement and the pictures all show the bleeder higher on the caliper than the intake. I am confused....
Seo



kane67
Posts: 286
Joined: Tue Aug 18, 2015 2:15 pm
Location: Finland
Motorcycle: Honda GL1500-88

Re: Re-building Calipers

Post by kane67 » Thu Feb 28, 2019 3:10 pm

Hi,
I believe air (lighter) is easier to get out from the top.
I prefer to use vacuum (large syringe with tube) than pressure.
Especially my clucth slave needed vacuum ;)

br, kane

Seo
Posts: 6
Joined: Mon Jul 01, 2013 10:32 am
Location: Homosassa
Motorcycle: 1999 Goldwing 1500 SE

Re: Re-building Calipers

Post by Seo » Thu Feb 28, 2019 3:48 pm

Kane,
I have a small vacuum too. But right now after rebuilding the right front and placing it on the disc, I cannot get enough pressure on the break no matter how much new break oil I push in. When I put the oil on, the break lever is secured back against the arm, then vacuum the oil, closing it when the bubbles stop. Still no pressure on the disc.

Thoughts?

tomk1960
Posts: 18
Joined: Thu Sep 27, 2018 8:19 am
Location: Worcester, MA
Motorcycle: 2010 Kawasaki Nomad, 1986 Honda VFR750F, 1983 CB1100F Super Sport, (3) 1978 Honda GL1000, 1974 CB750 Four

Re: Re-building Calipers

Post by tomk1960 » Thu Feb 28, 2019 4:53 pm

The bleeder is always higher than the banjo bolt.

Check out my how-to video on YouTube for brake bleeding:

It's a relatively simple process that can be finished during the consumption of one beer. (or two if you drag your feet)

You don't need any special tools or a MityVac, as long as you prime your master cylinder before the actual bleeding process.

Seo
Posts: 6
Joined: Mon Jul 01, 2013 10:32 am
Location: Homosassa
Motorcycle: 1999 Goldwing 1500 SE

Re: Re-building Calipers

Post by Seo » Sun Mar 31, 2019 2:11 pm

This was great how to... thanks

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Snowmoer
Posts: 107
Joined: Fri Jan 25, 2013 12:23 pm
Location: Cedar City UT
Motorcycle: 2012 GL 1800
1988 GL 1500
1977 GL 1000
2012 KLR 650

Re: Re-building Calipers

Post by Snowmoer » Mon Apr 01, 2019 9:54 am

When using a Mity Vac, you do not pull back the break lever. You hook up the vac, pump up some pressure on the vac, and open the bleeder. The fluid will be sucked out of the master cylinder fluid tank. Close the bleeder before you drain the tank and refill. Repeat if needed. Just make sure you do not suck all the fluid out and get air back into the system.

On some of my bikes and vehicles, air will leak in around the bleeder. I just keep sucking fluid until the color changes. If their is air in the break system, it gets sucked out even though you still see air bubbles in the vac fluid line. Those are the ones coming in around the bleeder.

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DougEFresh1123
Posts: 161
Joined: Mon Aug 27, 2018 10:22 am
Location: Villa Park, IL
Motorcycle: 2002 Honda Magna VF750
1994 GL1500SE

Re: Re-building Calipers

Post by DougEFresh1123 » Wed Apr 03, 2019 1:45 pm

tomk1960 wrote:
Thu Feb 28, 2019 4:53 pm
It's a relatively simple process that can be finished during the consumption of one beer. (or two if you drag your feet)
Great video! I must be a slow learner/worker, I finished 3 beers. :D :lol:


'02 Magna VF750
'96 GL1500SE
- Doug

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