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Moondog
Flying Brick Rider
Joined: 09 Oct 2004
Posts: 670
Location: Richmond Hill, Georgia
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 Posted: Wed Aug 04, 2010 5:13 am Post subject: 1996 K1100RS - ABS II bleed brakes |
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What is the preferred method to bleed the ABS and calipers, suction or pressure?.
I have hand Might-Vac. I had the ABS modulator out and when I bled it, no bubbles. Went to the calipers and bled them, no bubbles but still not firm, front or back.
I also have the check valved bleeders on the calipers. Does that effect the vacuum method?
A friend at work thought about pressure from caliper up. Anybody have any success with that method?
_________________
"Badges? We don't need no stinking badges"!
I like the social aspect of riding. Rally's, socializing, drinking beer, fartin' and carrying on. 
2004 R1150RS
1996 K1100RS (moved on to new home) |
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whyoldbill
Flying Brick Rider
Joined: 12 Jun 2006
Posts: 440
Location: in the boonies, northwest of Columbus, Ohio
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| Posted: Wed Aug 04, 2010 6:55 am Post subject: ABSII Bleeding |
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Moondog,
I had the same problem when I had mine apart.
I would not recommend pressure from the caliper up. I've heard that you can damage the valving inside the ABS unit, but I don't know if that's true or not.
After futzing about with a MityVac and getting nowhere, I resorted to the tried and true method of pumping the master cylinder up 6-8 times, cracking open the bleeder screw (starting with the ABS unit first), push fluid out, close bleeder, add fluid.... ad nauseum. Repeat on the calipers.
If you've got those check-valved bleeders, you should have no problems
I ended up using about a pint and a half or so of brake fluid.
Hang in there, you'll get it.
regards,
Bill
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'02 - GL1800
The desired effect is what you get when you improve your interplanetary funksmanship - George Clinton
Last edited by whyoldbill on Wed Aug 04, 2010 12:41 pm; edited 1 time in total |
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Scott_Anderson
Site Admin
Joined: 05 Sep 2006
Posts: 3122
Location: Central Iowa, USA
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| Posted: Wed Aug 04, 2010 7:16 am Post subject: |
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M-D, I haven't tried to use the small mightyvac, but I use a larger (air conditioning service grade) vac pump and havent' had any problems with leaving any air in the system.
Bleed the abs 1st then the calipers 2nd.
You may even try to find a used medical suction pump, would work better too.
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Ride safe.
1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold) |
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2xcelr8
Big Brick Rider
Joined: 29 Sep 2009
Posts: 71
Location: SE Wisconsin
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| Posted: Wed Aug 04, 2010 1:01 pm Post subject: Re: ABSII Bleeding |
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| whyoldbill wrote: | Moondog,
I had the same problem when I had mine apart.
I would not recommend pressure from the caliper up. I've heard that you can damage the valving inside the ABS unit, but I don't know if that's true or not.
After futzing about with a MityVac and getting nowhere, I resorted to the tried and true method of pumping the master cylinder up 6-8 times, cracking open the bleeder screw (starting with the ABS unit first), push fluid out, close bleeder, add fluid.... ad nauseum. Repeat on the calipers.
If you've got those check-valved bleeders, you should have no problems
I ended up using about a pint and a half or so of brake fluid.
Hang in there, you'll get it.
regards,
Bill |
+1 here. Buy the large bottle of brake fluid and you will use up most of it. I did this with both of mine this last winter.
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Doug
'96 K1100RS, '94 K1100LT, '84 Honda VF700F Interceptor (4 sale) |
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old guy old bike
Flying Brick Rider
Joined: 18 Jul 2007
Posts: 373
Location: Lisbon, OH
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| Posted: Wed Aug 04, 2010 1:05 pm Post subject: |
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I also used the Might-vac on mine and had what I considered a mushy pedal. All I did was give it a few pump and purge cycles and it came right around for me.
Jeff
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1993 K1100LT
2003 K1200GT Gone but not forgotten
2014 Victory Crossraods |
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Tim (Midland Section)
Flying Brick Rider
Joined: 08 Apr 2005
Posts: 960
Location: Pinxton, Nottingham, England.
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| Posted: Wed Aug 04, 2010 5:27 pm Post subject: Re: 1996 K1100RS - ABS II bleed brakes |
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| Moondog wrote: | What is the preferred method to bleed the ABS and calipers, suction or pressure?.
A friend at work thought about pressure from caliper up. Anybody have any success with that method? |
I have indeed bled from caliper to ABS & from ABS to master using a squirty oil can full of new fluid. My reasoning being that:- if the fluid & air are both rising the air will come out easier. Worked for me. Like yourself, I only needed to do it after removing the ABS 2 unit for access to clutch. The routing of the pipes does seem to cause air locks in an empty system.
Didn't use enough backwards pressure to annoy ABS or even to feel any.
HTH
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Grey haired riders don't get that way by pure luck
1996 Guzzi Cali3 LAPD
1972 750 Commando
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