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Rear disk brakes on motorcycle are not working

Cant get fluid to back brake calipers cant figure out why

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  • Expert
  • 430 Answers

Assumeing you have been trying to bleed the brakes and assumeing you tried that because your brakes quit working. Check a couple things. First try opening the bleeder first then pushing the peddle and see if fluid moves. Next make sure the piston in the master cylinder has its full range of motion ( not a lot of slop in the pedal at rest ). If you have these symptoms then you likely need a master cylinder rebuild. If you keep losing fluid you have a leak, and if you just changed a a bunch of stuff then its start at the beginning by bleeding the master cylinder.

Posted on Oct 25, 2012

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6ya6ya
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Posted on Jan 02, 2017

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  • 249 Answers

SOURCE: rear brake caliper removal

remove the two bolts holding it on

Posted on Nov 29, 2008

sunnymeadcyc
  • 11 Answers

SOURCE: 1979 Lowrider shovel rear brake calipers rattle

Here is a link to the aftermarket service manual.>>

http://sunnymeadcycles.com/files/1966-84_Shovels_Aftermarket_Service.pdf

Posted on Jun 02, 2009

  • 6 Answers

SOURCE: installing rear brake caliper rebuild kit.

To remove piston safely use the brake pedal to press out piston. You will need to remove the pads so it can do this. You will need a container to catch the fluid when the piston comes out. Clean the the piston with a fine polishing cloth 600 grit or higher so as not to leave scratches, replace piston if it pitted or burred. Clean inside of caliper, remove inside seal with dental type tool. Roll in the new seal, position same as old one. install new outter dust boot if equipped with one. Lubricate seal and leading edge of piston with brake fluid. Slide piston into calipier. You will need to make sure it is started straight and then use a C-clamp to compress the piston all the way in. Never ever use any oils or grease any any internal brake parts because it will cause seal failure. Clean parts are critical, but again , no petroleum products. Good luck

Posted on Jun 10, 2009

ginocussen
  • 216 Answers

SOURCE: rear brake caliper suzuki burgman an400

Have never seen any bike fitted with cam type pistons as per cars, should be a simple job.

Posted on Jun 29, 2009

bulldogchief
  • 388 Answers

SOURCE: rear brake pad change 07 streetglide

You don't have to but you should pull the caliper anyway, to clean it and check the anti-rattle spring.

Posted on Sep 08, 2009

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How do you replace the rear brake caliper on a 2006 hd sportster


Start with a suitable container placed under the rear caliper brake line banjo fitting to catch any brake fluid that may leak out. NEVER reuse brake fluid. Use only Dot 5 Brake Fluid in a 2006 XLH motorcycle. NEXT remove the banjo bolt and both washers to detach the rear brake line from the brake caliper and throw away the washers, remove the pad pin plug, unscrew and remove the brake pad pin, remove the brake pads, unscrew and remove the caliper bolt pin, slide the brake caliper on the rear bolt pin away from the brake disc as far as possible. THEN with an open end wrench unscrew the mounting bracket bolt pin from the caliper mounting bracket and lift the brake brake caliper straight up and away from the brake disc and the caliper bracket.

LUBRICATING THE REAR CALIPER BOLT PINS AND BOOTS
FIRST apply about 0.4 g of G40M BRAKE GREASE inside the caliper bushing boot and the caliper pin boot and inside the boot lip to prevent sticking between the boots and the bolt pins and insert the mounting bracket bolt pin into the caliper bushing boot.

INSTALLATION
Before installing the caliper ensure that the retainer bracket is properly installed on the mounting bracket, then apply a small amount of LOCTITE 272 THREADLOCKER to the threads of the mounting bracket bolt pin, place the rear caliper assembly onto the mounting bracket and using an open end wrench thread the mounting bracket bolt pin into the caliper mounting bracket and tighten it to 87-130 in-lbs (9.8-14.7 Nm). THEN apply a small amount of LOCTITE 272 THREADLOCKER to the threads of the caliper bolt pin, slide the caliper bolt pin through the front mounting hole in the caliper, carefully insert the bolt pin shaft into the caliper pin boot in the mounting bracket and screw the bolt pin into caliper and tighten it to 15-18 ft-lbs (20.4-24.6 Nm).
NOTE that the brake caliper housing has a positive stop for banjo fitting and so when tightening the banjo bolt into the brake caliper you will need to rotate the banjo fitting clockwise until it contacts the positive stop.
THEN position a new washer onto each side of the hydraulic brake line banjo fitting, insert the banjo bolt through the washers and fitting into the caliper housing and tighten it to 20-25 ft-lbs (27.1-33.9 Nm). THEN insert the brake pads into the caliper with the friction material on the pad towards the brake disc and with the curved portion of the pad fitting into the recessed area of the caliper and the brake pad front mounting tab fitting into its slot in the caliper mounting bracket. THEN press the brake pads tightly up and against the brake pad spring and install the brake pad pin but if the pin does not easily fit in ensure that you are suing the correct brake pads and not two identical pads, that the brake pad spring is oriented correctly, that the brake pad front mounting tabs are properly seated in the slots in the mounting bracket and that the brake pads are correctly pushed tight up against the brake pad spring BEFORE the brake pad pin is installed. AND THEN tighten the brake pad pin to 131-173 in-lbs (14.8-19.6 Nm). THEN install the brake pad pin plug and tighten it to 18-25 in-lbs (2.0-2.9 Nm). THEN with the rear brake master cylinder reservoir in a level position verify the brake fluid level in the reservoir. If necessary and with the bike upright and not resting on its jiffy stand remove the rear brake master cylinder reservoir cap and add sufficient new D.O.T. 5 BRAKE FLUID to the reservoir to cause the fluid to reach the upper fluid level mark, but do not exceed this mark. THEN verify the proper operation of the master cylinder relief port because a plugged or otherwise blocked relief port could cause the brakes to drag or stick on. Do this by pressing against the rear brake caliper to push the caliper piston back into its bore and push brake fluid back through the master cylinder and into the reservoir. THEN pump the brake pedal until the caliper piston pushes the brake pads out against the brake disc and firm pressure is returned to the brake system.THEN turn ignition switch ON and pump the brake pedal to verify correct operation of the brake lamp and test ride the motorcycle at low speed to safely test the brake system. If the brakes feel at all soft or spongy, bleed the system until you get a firm, hard pedal and avoid making hard stops for the first 100 miles (160 km) to allow the new pads to become conditioned to the brake disc.


Replace brake pads at any time the brake pad friction material on either the front or rear caliper is worn to 0.04 in. (1.02 mm) or less above the backing plate and always replace both pads in a caliper as a set.

The minimum brake disc thickness is stamped on the side of the disc and it must be replaced if and when it is badly scored or worn past the minimum thickness. Maximum brake disc lateral runout and warpage is 0.008 in. (0.2 mm) when measured near the outside diameter.

May 21, 2014 | 2004 Harley Davidson XL 883 Sportster

1 Answer

Rear brake problems


"pedal all the way down, no movement of caliper"
Sounds like hydraulic problem.

Check if you have enough brake fluid.

If so, it could be a bad master cylinder.
Rear brake light switch won't work without hydraulic pressure (which also works the caliper), while front brake light switch is mechanical.

Sep 02, 2013 | Harley Davidson FLSTF - FLSTFI Fat Boy...

2 Answers

Rear brakes don't work on my 2004 Sportster


Air in system push caliper piston right in & hold while bleeding

Ride Safe

Bike-Doc

Jan 22, 2012 | 2004 Harley Davidson XL 883C Sportster...

1 Answer

I have a'90 goldwing,I cannot get brake fluid thru


Your rear brake pedal operates the rear caliper and the front disc. When you tried to bleed the left front caliper you let air into the rear brake system. Bleed the rear brake and front left caliper using the rear brake pedal that should restore the rear (and front) brakes.

Jul 20, 2011 | 1990 Honda GL 1500 SE Gold Wing

1 Answer

My foot brake pedal will not come back up. I add fluid but did not work . I also need to change the back brakes. Thanks


If you added dot 3 fluid yu have a problem ..only use dot 5 fluid.. if you use dot 3 you will have to clean the whole system with mineral spirts then replace with dot 5 fluid .. may even have to replace line and caliper ..to change the brake pads undo the 2 tork screw in the caliper then remove the caliper from the brake disk change the pad and reinstall the caliper .. good luck

Feb 10, 2011 | 2003 Harley Davidson FXD Dyna Super Glide

2 Answers

I cant seem to get the rear brake caliper to compress so it will fit over the new pads


There are two stlyes of calipers for the rears. One is ratcheting so the piston has to be turned back to colaspe. The other type compresses with a C clamp. If a large retaining spring is on the inner part of the caliper you have the ratcheting type. A brake cable will attach to the spring as well. If not it will compress instead

Apr 10, 2010 | 2004 Mazda 6

1 Answer

98 harley davidson rear brake assembly for a fat boy


The rear brake system consist of a rear brake master cylinder, a metal line that has a tee in it for the rear brake switch, a rubber brake hose and a rear caliper.

I'm not sure what you are wanting to know. The rear brake caliper is held into the rear caliper bracket by two bolts. Remove the bolts and the rear caliper will lift off of the caliper bracket. With the brake caliper off the bracket, notice the position of the pads and especially the stainless steel anti-rattle clips. When you replace the pads and clips, make sure you get them in correctly.

Now, you'll have to compress the piston back into the caliper. To do this use either a large pair of slip joint pliers or a large C-clamp. Use a rag or something to protect the paint on your caliper. Carefully slid the caliper back down over the pads while not disturbing them. Install the two bolts and torque them to 25 foot pounds.

You brake systems, both the front and the rear, take type DOT 5 brake fluid as best as I can remember. Harley has changed the type of brake fluid but I cannot keep up with the year model. It should tell you on the tops of the master cylinder.

Extreme care must be taken whenever working on brakes. Make sure they work properly. Failure to test the brakes for proper operation prior to riding the bike can result in sever injury or death.

Apr 09, 2010 | 2000 Harley Davidson FLSTF Fat boy

2 Answers

How to collapse rear calipers on mini cooper


Did you notice the brake fluid level in the master cylinder before you tried to collapse the calipers? You should see a rise in level as you collapse them (however far they did collapse). If you're not seeing any change in the level (it should fill up) you might have a plugged valve between the caliper and the master cylinder. Loosen the brake fluid line to the caliper and try collapsing it again. If still no go, start dismantling the caliper and look for bent, broken, stuck or mal-adjusted pieces.

Feb 07, 2010 | 2005 Mini Cooper

1 Answer

Rear Brakes


First open the fluid tank and put a cloth around it not to spill any fluids.Push the rear caliper slowly and strongly against the disk rotor so that the caliper's piston go all the way in.If the fluids overflow the tank remove some.Unscrew the pin's plug at the rear end of the caliper with a flat screwdriver.Inside there is the pin's head witch is a 5mm allen bolt.Unscrew the pin and work backwards installing the new brake pads.After tightening the pin (18Nm) and the plug (12Nm), push the brake pedal many times until it's fully engaging the brake.Then add some brake fluid to the tank until it reaches the "max" mark and close it.And you're done.

Jun 27, 2009 | 2000 Honda CBR 600 F(4)Y

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