Question about 2003 Harley Davidson XL 1200 S Sportster Sport

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I have a 2003 sportster sport with dual 4 pot calipers on front.I have some ''brake drag''Master cylinder appears ok,i have changed seals in both calipers,repeatedly bled brakes but still have some dragAny ideas please

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If your hearing a noise like a herd of locus in your front wheel*slight brake drag sound) then that is normal, sadly yes I said that is normal.

Posted on May 20, 2010

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Just replaced rear shocks on 96 1200 sporty. Took for test ride and found that the front caliper appears frozen. The bike was moved earlier with no problem of moving.


Hi, Tony it happens probably need to rebuild the master cylinder and caliper for this scenario you will need your service/owners manual if you can not find the first and best tool you ever bought for your Harley, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below and for more specific information or questions at no charge please feel free to contact me at xlch@mail.com. Good luck and have a wonderful day.
Harley front brake caliper rebuild
HARLEY DAVIDSON FT MASTER CYLENDER REBUILD KIT INSTALL
https://www.carlsalter.com/pdfs/Harley%20Davidson%20%20Sportster%201986-2003%20Service%20Manual.pdf
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Apr 13, 2017 | 2000 Harley Davidson XL 1200 S Sportster...

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How do I bleed the brakes on a 2009 Pontiac G6?


when replacing the brakes you usually dont bleed the system ---usually bleed system when air gets in from like changing a line master cylinder or caliper-- and or master is empty .but to bleed you start at passenger rear first than drivers side rear,up to passenger side front ending at drivers side front

May 25, 2016 | 2009 Pontiac G6

2 Answers

Brake system failure


I think brake proportional Valve (or Brake pressure regulator) which usually a part of Master cylinder is suspicious.
It regulates pressure to Front and Rear brake line.

If I were you, I try to draw air from Master-cylinder side (not Caliper side).
(Bleed from connector between Master-cylinder and pipe, same way as caliper. someone keep pushing brake then you lose connector then tight. Don't forget to put towel under master cylinder to catch brake fluid)
If air trapped in Proportional valve (pressure regulator), pressure won't relay to rear brake line but only front side.
Front has two separate line from master cylinder (right and left) but rear goes in one line from master cylinder then separate at rear.

Did you noticed both rear brake dragged when it's hot day ?
Because when air get hot, air expand and pushes to caliper and drag but not respond to your pedal.
(calipers don't respond when you push pedal, but it's pushes calipers by itself even you are not pushing pedal, when it's hot because air expand)
Sometimes, seal get old and lose pressure for only one side (front or rear).

if this happened after you did brake job, or you notice your brake was vapor locked (too much brake on hot day then brake fluid boiled), maybe air bleed and whole fluid change may solve.
if you didn't have any unusual activity but it gradually losing pressure to rear, I suspect master cylinder (proportional valve seal).

Sorry I don't have exact e46 master cylinder diagram but basic diagram, hope you can understand what I am talking about.
Picture shows "leak" but this case "Air" in somewhere in pink.
or lose seal on rear piston.

25989474-goldldc3aki35lcvobofcxjr-2-0.gif

Dec 02, 2015 | Halonet 99-05 BMW E46 3-SERIES 2/4/5DR,...

2 Answers

02 Ford Explorer sporttrac xlt. New rotors calipers pads and master cylinder. Bled it twice stream looks good new fluid. One day breaks stick then the next no breaks Break light on Proportional valve?


For some reason these vehicles you need to bleed brakes several times, had same problem, so air hangs up in lines somewhere it apears. When you say brakes sticks, describe it better, locked up, or dragging on rotors?
CERACOAT-NANOTECH.com

Apr 21, 2015 | 2002 Ford Explorer Sport Trac

1 Answer

79 sportster rear brake starts to drag in the heat


Hi Anonymous, and the usual suspects are:
1. Brake disc badly worn or warped.
2. Insufficient brake pedal freeplay.
3. Brake caliper pistons/bore contaminated or damaged.
4. Master cylinder piston not returning all the way.
5. Brake line inner liner collasped
6. Dot 3 used in a Dot 5 system
Good luck

Jul 04, 2012 | 1979 Harley Davidson XLH 1000 Sportster

1 Answer

Harley electra glide front brakes rubbing


Hi Anonymous, check for warped disc, faulty front brake master cylinder, front brake caliper or inner liner of front brake line collapsed. Good luck

Apr 17, 2012 | 2003 Harley Davidson FXDX Dyna Super Glide...

3 Answers

Trying bleed the brake after a front caliper and front pads changed, all air is out of the system, but we don't have a good brake pedal, Please respond asap!!!!!!!


u pushed pedal down to far when bleeding, now u have a bad seal at master cylinder.the pushrod overextended. did u deplete brake before changing caliper and pads ? anti lock vehicles have to be depleted of all pressure before beginning work. have u bled all brakes? air could have been pushed to rear.

Apr 07, 2011 | 2003 GMC Yukon XL

1 Answer

Need help in replacing front and rear brakes on a 2003 mitsubishi montero full size


Hi there,

The pads are easy to change. You do not need any special tools. If there are no grooves in the rotors I would just put on new pads. Don't get cheap pads or they will squeek. I would strongly suggest that you flush out the old brake fluid. You will be amazed at how brown and gunky the old fluid is. Flushing the fluid regularly will help make your calipers and master cylinder last a long time. I like to use Valvoline Synpower brake fluid, it is a couple bucks more but it is DOT 4.

One last tip. When compressing the brake caliper piston you do not want to push the fluid back up to the system, because you might get some crud into the ABS module. Therefore, when compressing the piston, loosen the bleed screw to let the fluid flow out of the bleed screw.

This is how to get it done:
  • Remove the old fluid from the master cylinder resevior with a turkey baster. Top up master cylinder with fluid.
  • Remove the right rear wheel and bleed/flush the brakes with the old pads on. Top up master cylinder with fluid(important). Remove the caliper, open the bleed screw and compress the piston, close the bleed screw.
  • Install new pad and caliper
  • Bleed again. Top up master cylinder with fluid.
  • Repeat on remaining 4 wheels RR, LR, RF, LF.
Glad to be of help!!!

Jan 21, 2011 | 2003 Mitsubishi Montero Sport

1 Answer

How easy is it to rebuild the front brake master cylinder on a 2003 883 Hugger?


Rebuilding the master cylinder is relatively easy. Simply purchase a rebuild kit, take the master cylinder off the bike, Take the lever off and then most of the internal parts will simply come right out. With the internals out, you'll probably need to lightly hone the bore with a flex hone of the proper size. Lubricate the parts and install them just as they came out and reassemble the master cylinder. Then bleed the cylinder, hook up the brake hose on the bike and bleed the brakes at the caliper.

Go here to see an exploded view of your front master cylinder.
http://www.bikebandit.com/2003-harley-davidson-sportster-883-standard-xlh883/o/m18404#sch609894

Good Luck
Steve

Jan 21, 2011 | 2003 Harley Davidson XLH Sportster 883...

1 Answer

2006 chevrolet 1500 brakes shimmy without touching them,also when setting still mash couple times let off ,wheels hard to turn


check for front brake calipers dragging, if the are replace calipers and front brake hoses, if calipers ok replace master cylinder, This is how to check calipers, jack up front of truck have some one apply brakes and release as soon as they release the brake peddle the wheels should spin freely if not brake the brake line lose at master cylinder if wheels spin free with line loose replace master cylinder, if not replace calipers and hoses.....HOPE THIS HELPS

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