Brake Bleeding

By Jeep Experts


Eventually, we are going to all have to do some work on our brake system that may lead to the necessity to bleed the system. If air turns into trapped within the brake strains, which occurs after we disconnect a metallic line or rubber brake hose, the brake pedal will really feel tender and mushy. When you push the brake pedal, the air compresses whereas the fluid doesn’t, and can typically permit the pedal to backside out on the ground boards. In order to have efficient brakes, you need to bleed the air from every brake line (all 4 corners of the automobile) within the correct sequence assuming you probably did one thing like changing the grasp cylinder. If you solely labored on one of many axles, then you definately solely have to bleed the 2 brakes on that axle. If you impacted each axles, begin with the rear passenger facet tire and observe up with the rear driver facet tire. Next, transfer to the entrance passenger facet tire and end with the entrance driver facet tire. In different phrases, you begin on the brake cylinder or caliper that’s farthest from the grasp cylinder and end with the one that’s nearest the grasp cylinder.

Here is my typical brake bleeding setup. Pretty fancy, eah? I’ll inform you proper now that you’ll at all times get higher outcomes if you happen to use a Pooh Bear glass! LOL I put about an inch of brake fluid within the glass. I take advantage of an 18″ lengthy piece of vacuum line hose that matches tightly over the bleeder nipple.

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Here you may see the rubber line connected to the bleeder nipple. As you may see, there may be nonetheless room to place a small wrench in place so the the bleeder nipple will be opened and closed in the course of the bleeding process.

With the engine NOT working (sure, I stated not working), crack open the bleeder valve and let it gravity drain for a minute or two. You might or might not see any fluid come out. Now, with the valve nonetheless open, have your helper sit within the driver seat in order that she or he can fully depress the brake pedal. Instruct your helper to push laborious on the pedal and proceed doing so till you inform them to cease. When they’ve utilized pedal stress and it has gone to the ground, shut the bleeder valve and instruct your helper to slowly launch the brake pedal. Wait about 5~8 seconds and repeat this course of once more… bleeder valve, apply laborious brake pedal stress….watch the air and fluid bubble out….shut the bleeder nipple…..slowly launch the brake pedal.

Depending on how a lot air is within the brake strains, you will have to do the above process a lot of occasions. Once I get three or 4 good “flows” on the bleeder valve, the place there isn’t a longer any air effervescent out, I transfer to the subsequent tire. If it has been some time since your brake fluid has been flushed, you’ll discover some fairly darkish fluid popping out the road. When the brand new recent fluid replaces the previous fluid within the brake strains, you’ll see a lot cleaner fluid popping out (which is why I want to make use of a glass container). On the entrance axle, it’s possible you’ll need to change again and re-do the passenger caliper as soon as once more after ending with the motive force’s facet caliper.

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Be positive to test your grasp cylinder degree earlier than you begin bleeding the primary time and after ending with every tire. The brake fluid degree within the grasp cylinder reservoir will drop because the trapped air is pushed out of the brake strains. If you let the reservoir degree drop to low, it’ll suck air and put it into the system. This is NOT cool after which you’ll have to begin throughout since you should have air on the very starting of the brake strains and all of it must be bled off. You don’t need this to occur! I can often bleed each again brakes earlier than I want so as to add fluid. I then can usually do each entrance brakes earlier than topping off the reservoir and calling the job accomplished.

Be cautious NOT to get brake fluid in your paint end. The two don’t get alongside and your paint would be the one which comes out on the quick finish of the stick.

I believed I might give you a close-up of the Pooh Bear glass so you already know which one to get. Like I stated, I get superior outcomes when Pooh helps me! LOL

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