Question about Jaguar Cars & Trucks
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Posted on Jan 02, 2017
First look for obvious leaks under the vehicle, especially the inside area of each wheel... If you see fluid, you have either a blown cylinder seal or a bad line (check the rubber hoses to the front and back brakes too) Repair the offending part and bleed the air out of the system... (remember to clean pads or shoes if they have fluid on them)... If you see no hint of leakage anywhere, then suspect the master cylinder... if you remove the master cylinder, check and make sure that it didn't leak fluid into the brake booster diaphragm (Brake fluid will destroy the booster)... as in any repair when you open the system (lose fluid), you will need to bleed out the air to restore function... hope this helps...;-)
Posted on May 04, 2009
If the brake lines and fluid is clear then you may have to look at the brake booster found at the other end of the brake pedal under the hood...
Posted on Jul 23, 2009
Check the reservoir to be sure the fluid is full. If not, top it off and try it again. If there's still trouble building pressure, pump the brakes a bunch of times, and then check around each wheel for fluid on the ground. If you see none, it's possible that you have a break in the line somewhere through the chassis and that the fluid is leaking out inside. If you see no evidence of leakage, and the reservoir is still full, you need a new brake master cylinder - what will have happened is that the diaphragm around the plunger inside the master cylinder (which moves through the cylinder when you push the pedal, and forces fluid out to the wheels) has a hole or tear in it, so instead of pushing the fluid out to the brakes, the plunger simply moves through the fluid. It never builds pressure, and your brakes don't work.
Posted on Dec 22, 2009
Testimonial: "thanks for the info. very helpful. harry Newman"
SOURCE: brake problem
hi this is air in the system if you pump them do they go hard as normal? what you will need to do is , starting from the furthest caliper away from the fluid bottle you have to bleed the air out, you can buy bleeding systems for a few bucks/pounds but you can also do it yourself, to do this, find a length of small bore clear hose/pipe, locate the bleed nipple on the caliper, find a wrench/spanner that will fit the bleed nipple, put that on first, then get your pipe/hose, and slide that over the end of the bleed nipple ( make sure the pipe/hose is a nice tight fit ) locate a small clear glass jar partly fill it with brake fluid, put the hose/pipe into the jar so the fluid covers the end ( we don't want air to go up the pipe/hose ) then get a friend to pump hard on the brake pedal till it goes hard, and when it does tell them to keep their foot hard on the pedal , you then undo the bleed nipple ( you should get some fluid come out fast) when the pedal reaches the floor ( this happens immediately if you have opened the nipple far enough, then when it has hit the floor do the bleed nipple up again before they raise the pedal keep doing this till you see no bubbles coming through the hose/pipe, repeat the operation on the next furthest away, and so on till all the air has been removed from the system, be sure to check the fluid in the reservoir regularly as this will cause air to get back into the system again if it runs to low....hope this has helped and good luck, please vote thanks
Posted on Mar 20, 2010
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