With the engine off, depress the brake pedal about 6 times, all the way up and down. While holding the hard pedal down, start the engine, and if the booster is working properly, the pedal will fade down a little bit.
SOURCE: have replaced front brake disc,pads,calaipers,master
you have air in the lines. you need to bleed them.
SOURCE: brake air leak noise
check under dash for a leaky vaccum switch. if booster was faulty brake pedal would be very hard to depress.
SOURCE: where do you add brake fluid
Please don't add brake fluid to the engine, you'll ruin it. Brake fluid is added to the Brake Master Cylinder.
Hood open, viewing your Jeep from the front, (Facing the windshield)
The Brake Master Cylinder is on the upper right, mounted fairly close under the windshield.
(If you have Power Brakes it is mounted on a Power Booster. If you do not have power brakes it is mounted directly to the firewall)
This link below will show you what it looks like,
http://www.autozone.com/autozone/catalog/parts/partsProduct.jsp?skuDescription=Fenco+New+/+Master+Cylinder+%28Brake+System%29&categoryDisplayName=&fromString=&itemIdentifier=248428_56045_0_3482&productId=248428&sortType=&parentId=44-0&filterByKeyWord=&isSearchByPartNumber=&navValue=14400007&categoryNValue=14499999&fromWhere=&itemId=7-0&displayName=Master+Cylinder+%28Brake+System%29&store=1623&searchText=&brandName=Fenco+New
This link shows what the brake master cylinder looks like, not installed. You are looking at the back view of it.
From the mounting flange that has a hole on each side, to the tip of that rod sticking out, is a view you will not see.
The photo is to illustrate the top cover, and the wire looking device that holds the cover on.
Viewing the Jeep from the front, the wire device you see is moved to the ->Right.
A common tool used to move it would be a sturdy flat tip screwdriver.
It is very stiff to move, but be sure you are trying to move it the correct direction.
When you go to fill the master cylinder the proper level for the brake fluid is one-eighth inch below the rim edge. (1/8th inch)
You will see two compartments. You will also see that the master cylinder sits at an angle. It's angled toward the back. The back edge of each compartment's rim edge, is what you use to judge the brake fluid level. (1/8th inch below that edge)
SOURCE: no brake fluid reaching rear brakes after changing
Replace the master cylinder the rear has failed due to lack of fluid.
SOURCE: Leaking Brake Fluid from rear right disc brake
dont drive this vehicle take to machanic and get repaired have it towed. the hose could be the problem or were the drums are at a blown boot they push the shoes out aganist the drums to stop if fluid is leaking you well lose all brakes the emergency brake well work. but only use for emergenys only. good luck
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