How to bleed linked brakes


Information and questions on GL1500 Goldwings (1988-2000)
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Woehrer
Posts: 6
Joined: Sun May 20, 2012 2:10 pm
Location: Slinger, WI
Motorcycle: 1998 GL1500

How to bleed linked brakes

Postby Woehrer » Sun May 20, 2012 2:34 pm



My rear brake pedal became extremely spongy two years ago, had a dealer flush and bleed and the pedal returned to normal. This year after taking out of storage it did it again. Is this something normal? What is the proper sequence to bleed out the linked braking system and do I need to do the fronts with them? Thanks, PW



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zamboni920
Posts: 250
Joined: Sun Aug 14, 2011 5:15 am
Location: Stavanger, Norway
Motorcycle: 1996 GL1500 SE with Hannigan 2+2 sidecar

Re: How to bleed linked brakes

Postby zamboni920 » Sun May 20, 2012 7:42 pm

On the linked brakes, the brake pedal activates the rear brake and the left front brake. The brake lever is only for right front disc. Manual says to bleed front (left front) first, then rear. Basically start with the one furthest from the master.
If brakes bleeds down like yours, I would guess a leak somewhere. Might not be fluid coming out, but perhaps air getting in. Check around lines,master and calipers for any sign of leaks, new or old.

teal92
Posts: 3
Joined: Wed May 23, 2012 11:06 am
Location: Middletown, Ohio
Motorcycle: 1992 GL1500SE

Re: How to bleed linked brakes

Postby teal92 » Sun May 27, 2012 10:26 am

Woehrer wrote:My rear brake pedal became extremely spongy two years ago, had a dealer flush and bleed and the pedal returned to normal. This year after taking out of storage it did it again. Is this something normal? What is the proper sequence to bleed out the linked braking system and do I need to do the fronts with them? Thanks, PW



Did you ever find out the reason for your spongy brakes. I am having the same problem with my 92 1500SE ?

Woehrer
Posts: 6
Joined: Sun May 20, 2012 2:10 pm
Location: Slinger, WI
Motorcycle: 1998 GL1500

Re: How to bleed linked brakes

Postby Woehrer » Sun May 27, 2012 12:12 pm

Zamboni920, Thanks! I did bleed brakes and it worked. Started with left front and then rear X2 for peace of mind. I did not see any issues with lines or leaking. I'm wondering if there was water in the brake fluid so when it froze and thawed caused air bubbles. Not sure if that is even possible:) I will wait to see what happens next spring when I take it out of storage. PW

Woehrer
Posts: 6
Joined: Sun May 20, 2012 2:10 pm
Location: Slinger, WI
Motorcycle: 1998 GL1500

Re: How to bleed linked brakes

Postby Woehrer » Sun May 27, 2012 12:15 pm

Teal92, Is it just your back brakes (pedal)? Try bleeding as we have posted and do it twice to make sure you get all the air out if that is the problem. My pedal did not seem hard when I was bleeding them but responding nicely once I got it on the road. PW

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chouston99
Posts: 24
Joined: Tue Jan 18, 2011 9:56 am
Location: Amarillo,Tx
Motorcycle: 1994 GL1500 se

Re: How to bleed linked brakes

Postby chouston99 » Thu Jan 30, 2014 9:12 am

Can you bleed rear brakes without removing saddle bags?
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RBGERSON
Posts: 2625
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: How to bleed linked brakes

Postby RBGERSON » Thu Jan 30, 2014 10:18 am

Old brake fluid absorbs water and it gets spongy..change your brake fluid at least every two years.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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WingAdmin
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Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
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1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: How to bleed linked brakes

Postby WingAdmin » Thu Jan 30, 2014 12:46 pm

chouston99 wrote:Can you bleed rear brakes without removing saddle bags?


Yes, there is an access hole in the left saddlebag. When its cover is removed (from inside the bag), you can reach the brake bleeder on the rear wheel.

Be careful however - if brake fluid squirts or spills onto the plastic saddlebag, it can damage the paint and cause the plastic to become brittle and easily broken.

Melloreel
Posts: 50
Joined: Tue Nov 19, 2013 4:17 pm
Location: Coastal Ga.
Motorcycle: 1992 GL1500 aspencade
2009 Streetglide

Re: How to bleed linked brakes

Postby Melloreel » Thu Jan 30, 2014 4:37 pm

? I'm not sure how firm the rear brake pedal should be, so I'm not sure what is normal here? Bike sat for 5 years before I got it so I decided to change all brakes and fluid just to be safe. Now I can't get the pedal to be firm when applied. My Harley is very firm with just a little pressure.
I have bled the brakes per service manual. Can't find any leaks. At first I was getting a lot of small air bubbles, then after several bleeds only fluid. Then when I rode the bike the pedal goes 1inch or so and feels spongy? Normal?
Could air be trapped in the banjo bolt? I read that somewhere else.




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