Question about 1992 kawasaki ZXR 750

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Rear brake problem zxr750

Put second hand reconditioned brake caliper on rear and it will not bleed up to give pressure does any one know if it has to be pressue bled?thanks jigs

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  • louise_jigs Feb 28, 2009

    worked like a dream saved me 50 quid thanks 4 ur help jigs

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Hey there,, just gonna guess that u are tryin to bleed the caliper with it on the wheel already,,if u are m8 then itl take ages to pressure up,, im takin it that the caliper has never been split appart b4,, so any way,,take the caliper off the wheel ,but still leave it connected to the brake line,,take pads out to, and just place a pad in between the to pistons,,fill up the resevoir with fluid,, leave the cap off and just put the rubber cap in ,,start pumpin the foot brake,u should see the pistons moving,,keep pumpin till the pistons are a fair way in,, then if u have some put some copper grease on the pistons, then prize them back in,,then replace the pads then pump the foot brake again,just to check,its all moving,, put caliper bk on the wheel ,then bleed as normal,, gettin all air bubbles out,, ,hope that all makes sense m8,, any probs ,,shout and stage 2 story il tell yuh,, cheers now

Posted on Feb 27, 2009

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1 Answer

What causes my rear brakes not to get enough pressur to bleed them


Because of ABS you can't use the traditional method of bleeding brakes. You have to bleed them by forcing fluid from the bleed nipple up to the master cylinder.

Apr 18, 2016 | Cars & Trucks

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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,...

1 Answer

Rear passenger brake dosen't work


Are there two brake fluid reservoirs? And are both full? This would be a split-diagonal brake system-front driver and rear passenger are one brake system. Front passenger and rear driver are the other system. You have the one system working-the front passenger and rear driver side works. You will have to keep bleeding the rear passenger side and the front driver side-always start farthest from the master cylinder, but if that wheel just won't bleed air out, make sure the driver front is working and bleeds good. If all else fails, there are pressure bleeder kits available, I don't know the cost, but they work great. They are also a one man bleeding job, as I understand.

Dec 10, 2013 | 2000 Chrysler Concorde

1 Answer

Brake


There are several problems. Your caliper could be stuck and that is a problem. You probably have a rubber brake hose that is clogged up internally and restricting the flow of fluid, a second problem.
The internal rubber hose can form flaps which close off the flow of fluid. You only have pressure in 1 direction so it is easier to have a stuck caliper because the fluid will trap in the caliper and refuse to return to the Master cylinder.
But this must really be blocked or the safety valve has shut off the diagonal lockout for the ABS. For safety when fluid pressure is lost, a valve shifts and tries to keep a front and a rear brake diagonally supplied with fluid.
What you need to try before giving up on the current project is bleed your brakes starting from the longest rear line and work your way forward with the last line being the shortest.
You may discover that you now have fluid bleeding from the problem caliper. If so, part of the problem was the safety valve killed the fluid flow. You still have a bad rubber line, and possibly a stuck caliper, but now you may have fluid flow.
If I were you, I would buy a rubber brake line and change it before bleeding the system. Then you can see if the caliper is working or not. Rubber lines are cheap compared to most parts.
By bleeding the lines as I recommend, you stand a chance of centering the safety valve and solving part of your problems. If a rear line diagonal to the problem front caliper is also dry, then the safety valve was tripped.
With the rubber brake line removed, you should be able to compress the problem caliper with ease; if not, it is stuck and should be replaced.
At this point, I should mention the ABS box. Pressure coming from the box can be measured as well as Master cylinder pressure going to the box. Hydraulic gauges would be necessary. It would be the final explanation to your problems should the easier solutions fail. Testing price versus component price should be considered.
You will restore fluid flow and be able to test your stuck caliper using what I gave you.

Jun 02, 2013 | 1998 Mercury Mystique

1 Answer

I just had new tires installed on my 99 sportster 883. Went riding for 2 and half hours , came home was going to leave again and the rear brakes were locked up i took the caliper apart and knocked off...


Normally, just having a tire put on should not effect your brakes in any manner. However, I do not know what the people that changed the tire did. Usually when a brake caliper locks up, it's caused by air in the system. They may have taken the brake line loose from the caliper but it was not necessary and there's no way to prove it. Also, there is a small hole in the bottom of the master cylinder that allows the pressure to bleed off the caliper. If this hole is blocked, it will not allow all the pressure to bleed off properly. Another thing that could cause it is the rear rubber brake hose. If the people that changed the rear tire allowed the this rubber line to bend too sharply, it could have damaged the inner lining of the brake line. This will allow the brakes to be applied due to the high pressure but restrict the bleeding off of the pressure. I've seen this many times and this is my best guess as to the problem, damaged rubber brake line.

Good Luck
Steve

May 30, 2011 | 2003 Harley Davidson XLH 883 Sportster

3 Answers

After putting on new calipers on both sides of my dodge ram 2005 1500 and bled brakes I have no brakes. What is the problem they worked fine until I did the caliper and brake


Did you bleed rear brakes also? Should do all 4 whenever bleeding brakes starting w/ right rear, left rear, right front then left front. Sounds like air in lines.

Mar 22, 2011 | 2005 Dodge Ram 1500

1 Answer

Wondering how to bleed rear barkes and calipers on


If you have two people.....press brake pedal...open bleeder screw then close, release brake...repeat until you hear no air bubbles. Fluid will comes out of bleeder. do not reuse. Brake fluid must be clean.
Do one brake at a time. You should feel normal pedal pressure when complete.
If you are by yourself, you can put tubing over the bleeder screw and insert into a small bottle to catch the fluid, and create a air tight seal. It is called a one man bleeder kit.
One other way, is to use a hand vaccum pump to **** to fluid through the lines.
Good Luck! It is easy as pie.

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1 Answer

I am having problems finding a peddle after replacing the rear brake caliper any tips?There is no pressure at the caliper end of the brake line. I have checked the master cylinder and it is pumping...


it sounds like the brake pipe is blocked up with dirt or somthing,,,take the brake pipe off the rear caliper and stamp on the foot brake peddle if no fluid comes out there is the problem,,,it may be an air lock or just a blockage like you may have twisted the pipe closed doing it up to tightly? or only using one spanner insted of two!!!! if you have closed the pipe up, it would be safer to replace the pipe,,, before it blows out on you! also when you do finaly get brake fludid to the rear caliper,, press the pistons right into the caliper before bleeding the alr out then finaly pump up the brakes,,, dont bleed the brakes to slowly or the air will run back up the pipe,,,,undo the bleed nippel put your finger over the end of it and pump the foot brake about once every second till all the air is out then nip up the nippel,i hope this helps you out

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2 Answers

I need to know how to bleed the brakes on a 1999 chevy blazer


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1 Answer

Brake pedal won't return.


There could be a couple reasons for this. First thing to check is your return spring, is it still there and attached properly? Next thing to check is your master cylinder pressure release. Loosen the bleed nipple on the rear caliper. Does the brake release now? If so, your master cylinder has some debris clogging the fluid return passageway. Remove and clean it. If the brake still does not release after opening the bleed nipple, at least one of your caliper pistons is binding. Remove the rear caliper and the brake pads. Now press the pedal and force the pistons out. Looses the bleed nipple and attempt to press the pistons back into place. They should move smoothly when you apply firm pressure. Clean the caliper thoroughly. If you have a rebuild kit for the caliper this is a good time to rebuild it. After cleaning, put it back together, bleed the brakes and test again. It is normal for disk brakes to drag SLIGHTLY on the rotor, but they should not stop a free spinning wheel in less than a coupld revolutions when spun by hand.

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