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Apr 13th, 2008, 01:37 PM
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#1 | | Very Active Poster 50+
Join Date: May 2007 Location: Whitehall, Pennsylvania
Posts: 68 Model: 06 sportster 883/1250 Interests: riding and computers Occupation: Technical Assistant
| Rear master cylinder failure This really is wierd, installed second rear brake light switch in less then two years (first two were the motor company). Went to bleed the brakes got two solid pumps from the master cylinder and then nothing. Seems as if the mastercylinder just decided it had enough after 14k miles. Reservoir still had fluid in it so i did not run out. Took cylinder apart nothing real obvious. Do not know if i should put the rebuild kit in or replace completely. Anybody have any thoughts on this?
Tim |
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Apr 14th, 2008, 02:13 AM
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#2 | | Has posted 500+
Join Date: Feb 2007 Location: middleburg, pa
Posts: 730 Model: 06 FLST hertiage, stage 1 1450 pc111 Interests: hunting,wood working Occupation: medical asst. tech/DPW
| not sure, on cars it's pretty much a waste of time due to the cheap cost of a rebuilt unit. from what i've seen mc fail with age due to corrosion resulting in a pitted plugger. doubt thats the case in your situation. yours sounds more like some premature failure due to workmanship at the plant, or maybe a stuck valve, i'd definately let the steeler know about it. if i were in your situation i'd want a new unit. |
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Apr 14th, 2008, 03:34 AM
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#3 | | 200+ posts and climbing
Join Date: Jun 2004 Location: Massachusetts
Posts: 464 Model: 1999 Fatboy Interests: Bikes, Cars, Woodworking, etc. Occupation: Jack of all trades and master of none
| It seems that the rear MC can be a real PITA to bleed sometimes, at least in my experience. Before you go and replace the whole thing, I would try some other bleeding techniques. I've used a vacuum pump and sucked it down from the caliper bleeder screw with success. You can also get a hand vacuum pump at some of the local auto parts places. I think Advance Auto simply calls them "Self Bleeders". There are others. Once I used a block of wood and some wire ties to hold the brake lever down over night. Then I bled the air out the next morning. That seemed to work well too.
Good luck.
__________________ "In my family, goodness is just badness that hasn't had a drink yet." -Christopher Titus |
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Apr 14th, 2008, 03:58 AM
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#4 | | Very Active Poster 50+
Join Date: May 2007 Location: Whitehall, Pennsylvania
Posts: 68 Model: 06 sportster 883/1250 Interests: riding and computers Occupation: Technical Assistant
| thanks guys, my experience with the car type also the same. rebuilts are cheaper and less of a hassel. I already have tried to pull the fluid thru with a hand vacum pump thru the caliper bleed hole with no success. According to the HD manual this master cylinder can be just hooked up and it should start pumping fluid. Does not say anything about bench bleeding the cylinder first. Guess we will head to the dealer and see if he has the cylinder in stock, otherwise i will try the repair kit. |
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Apr 14th, 2008, 12:48 PM
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#5 | | Has posted 500+
Join Date: Mar 2006 Location: spokane, wa.
Posts: 1,009 Model: 03 883 XLC-CHOPPER Occupation: welder
| Maybe Something In The Line, I'm Sure You Use The Right Fluid, Don't Understand Why Your Switch Would Keep Going Out, Could Try To Take It All Apart And Clean It Out, Could Take The Switch Off And Pump To See If The Fluid Makes It That Far, And Back Track. |
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Apr 14th, 2008, 05:54 PM
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#6 | | Very Active Poster 50+
Join Date: May 2007 Location: Whitehall, Pennsylvania
Posts: 68 Model: 06 sportster 883/1250 Interests: riding and computers Occupation: Technical Assistant
| well , Had to put a rebuild kit in it , that solved the whole problem pumped right up. went for a test ride all was well with the brakes. Got back into my driveway and guess what fuel is coming out of the carb overflow like it is going out of style and the bike is about to shut off. What now , pulled the carb bowl and whole bunch of fine dirt in the bottom of the bowl , evidently there is a bigger piece logged in the needle and seatand will not shut off the fuel. Looks like the carb comes off now to get cleaned out |
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Apr 14th, 2008, 06:16 PM
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#7 | | Moderator Has posted 500+
Join Date: Jul 2005
Posts: 8,709
| it is all part of the fun of owning a fossil fuel burning vehicle!!!!!!!!!!!!!!!!
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Apr 14th, 2008, 08:23 PM
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#8 | | 200+ posts and climbing
Join Date: Apr 2007 Location: Central Valley, CA
Posts: 258 Model: 2005 RoadGlide, 1996 RoadKing, 2005 Delu Interests: Motorcycles, Grandkids Occupation: HD Service Tech
| Look at the bright side, you are capable of doing the work yourself so you don't have to put out the bucks to have someone else clean out your carb. You might try pulling out your petcock and checking the screen/filter for small holes. Blow out all of the jets and the air passages to make sure there isn't any crude waiting to give you a return problem.
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but while we're here let's ride.... |
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Apr 14th, 2008, 08:30 PM
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#9 | | Has posted 500+
Join Date: Sep 2006 Location: I'm everywhere, I'm everywhere
Posts: 1,152 Model: 06 flhxi Interests: family,fun, fast chrome Occupation: causing hate and discontent
| dang I got confusededed, went from brakes to carbs and didn't miss a beat......wow.  ok good to go again
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