The most typical state of affairs when extended brake strains are vital is whenever you set up a raise in your Jeep. The space between the body/body of the Jeep and axles will increase after a suspension carry, subsequently longer brake strains are required during articulation. You may also need to substitute your stock rubber brake strains with chrome steel braided brake strains if you understand that the inventory strains are deteriorating on account of weather circumstances (very excessive temperatures in the summer or plenty of salt on the street resulting from ice and snow in the winter) and once you start noticing a much softer, spongy brake pedal feel. That feeling is most probably resulting from moisture stepping into the brake strains, which results in lowered boiling level of the fluid and forming of air bubbles, in addition to corrosion of the metallic elements of the system and consequently contamination of the fluid.
Any time you open up the brake system, like whenever you substitute the flexible brake strains, it’s essential to carry out a proper bleeding process. When bleeding the brakes you will have to add more fluid to your grasp cylinder. I might recommend that when you’re at it, you may as nicely flush the complete braking system and substitute all the brake fluid with recent one. It is truly beneficial that trendy automobiles have their brake fluid changed as soon as every 2 years.
This is due to the fact that most automobiles immediately use DOT brake fluid, and the traits of that fluid.
DOT brake fluid is hygroscopic, which suggests it attracts moisture. Over time brake fluid will accumulate a specific amount of moisture; a research by the Nationwide Highway Visitors Security Administration found that 20 % of the automobiles they tested had brake fluid with 5-percent moisture content material. A 3-percent moisture content material in DOT Three brake fluid reduces the boiling level of the fluid by more than 100 levels.
When moisture within the brake fluid boils because of the super quantity of heat generated by the brakes, you possibly can truly lose the power to cease. In addition to that, the moisture may cause corrosion of the wheel cylinders or brake calipers and ultimately cause a leak.
The opposite thing to be careful for is soiled fluid. Brake fluid can get very soiled if left unchanged yr after yr. I’ve seen some grasp cylinders that look as in the event that they have been crammed with mud.
With newer model automobiles like the Jeep JK, commonest points stem from the degrees of dissolved copper and depleted additive package deal in trendy brake fluids. When the additive package deal of brake fluid is depleted, one of the unfavourable results could also be inner brake system element corrosion and sludge construct up.
In this write-up I can be describing the process of changing all four flex brake strains in addition to flushing the whole brake system and bleeding the brakes. With brand new, prolonged chrome steel flex strains and recent brake fluid flowing through the complete brake system, in addition to changed brake pads and new, bigger brake rotors (see my publish), my Jeep’s brakes are going to work as new once more. I’m performing an entire brake system overhaul in preparation for a suspension carry, to ensure I can confidently drive my lifted Jeep each day, as well as take pleasure in wheeling it over some enjoyable obstacles.
Disclaimer: Like I all the time point out I’m not knowledgeable mechanic, I simply attempt to do as much work on my Jeep as potential. It helps me study extra about my car and avoid wasting cash that can be spent on elements and upgrades.
I take no duty for any damage or breakage which might occur in the event you determine to comply with these steps. You need to determine in the event you’re snug working in your Jeep. In case you’re not, please have knowledgeable full this venture for you.
Elements and instruments wanted:
1. Rear Brake Line Package with Hardware and Front Brake Line Package with Hardware
2. TeraFlex JK Front Brake Line Anchors (optionally available)
Three. Brake Fluid – 1 Quart
four. 500ml Plastic Bottle and Plastic Hose
5. Plastic Funnel
6. Turkey Baster or Plastic Syringe
7. Zip Ties
Eight. Energy Drill with Drill Set
9. Flare Nut Wrench Set
10. Drain Pan
11. Tongue and Groove Pliers and Hammer
12. 3/Eight-Inch Drive Ratchet and Socket Set
13. Pry Bar or a Flat Screwdriver
14. 1 in. x 14 ft. Ratcheting Tie Down Strap (elective)
15. Brake Cleaner
16. Shop Towels or Paper Towels
Put together your tools and get the whole lot prepared before you begin the challenge. Park your Jeep on a degree floor, apply your emergency brake and put your transmission in park or in gear if in case you have a 6-speed guide transmission. Chock the entrance wheels.
Be sure to have sufficient recent brake fluid to finish the undertaking. 1 quart ought to be just the correct quantity to switch all of the brake fluid within the system for all 4 brakes.
You possibly can construct your personal brake bleeder package utilizing a clean 500ml plastic bottle (find one produced from arduous plastic in case you can), about 30″ of 3/8″ OD clear hose and a zipper tie.
Turkey baster or giant syringe can be needed to remove a number of the previous brake fluid from master cylinder, and a funnel will assist with including recent brake fluid to prime off the master cylinder.
Drill a 3/8″ gap within the water bottle cap and feed sufficient hose through to have it contact the bottom of the bottle. Drill a second, smaller vent gap within the cap. In an effort to forestall the hose from coming out of the bottle, place a zip tie in the location right beneath the cap (you’ll be able to glue it to the hose if it retains sliding).
Fill the bottle 1/4 of the best way with recent brake fluid. It is necessary that the hose stays submerged within the fluid and doesn’t come out throughout all the bleeding process.
In case you are replacing all four brake strains or need to flush your complete brake line system, you’ll need to start out this job from the passenger aspect rear brake. In case you are solely working on your entrance brake strains, then you have to begin at your passenger aspect entrance brake.
The thought is that it is advisable start from the brake that’s farthest from the grasp cylinder.
Raise the rear axle and relaxation it on no less than two jack stands. Take away each wheels.
Locate the versatile section of brake line that can be replaced with new chrome steel extended line. You can start disconnecting at both the body bracket or at the banjo bolt. I might recommend starting with the frame bracket end, since you may have the ability to stop the fluid from dripping sooner and restrict the mess.
Loosen the 12mm flare fitting connecting the flex line and bracket to the strong brake line. Take away the 10mm bracket bolt.
Disconnect stock flex line from the strong line utterly.
After disconnecting the stock flex line, you possibly can both join your new extended line instantly and raise the opposite end of it as high as attainable, or you should use a 1/8″ female thread brass pipe cap to cease the brake fluid from dripping out of the brake strains (don’t over tighten or you can injury the threads).
Place a drain pan underneath the brake caliper.
Rigorously take away the banjo bolt. I might recommend using a flare nut wrench in an effort to forestall injury to the bolt.
Let the fluid drain out of the flex line and brake caliper.
Clean the banjo bolt with brake cleaner and set up new copper crush washers as pictured.
As a way to correctly join your new extended brake line and new frame bracket to the strong brake line, you may need to push the strong brake line in the direction of the rear of the Jeep. The line is supported with a plastic bracket but it is going to slide through with somewhat little bit of pressure.
Align the whole lot and tighten the 12mm fitting, while holding the brand new bottom nut with an 18mm open finish wrench. Tighten body bracket’s 10mm bolt.
Push in the offered spring clip. Gently faucet with a hammer if vital or rigorously use a pair of tongue and groove pliers.
With the whole lot tighten and spring clip in place, the connection should really feel strong and secure.
Join the opposite finish of your new, prolonged flex brake line to the brake caliper (be sure brake line isn’t twisted). Catch the banjo bolt by hand to stop cross threading, and tighten to 23 ft. lbs.
You at the moment are prepared to begin the flushing and bleeding procedure for the passenger aspect rear brake.
Take away the rubber cap hooked up to the brake caliper bleeder valve. Push the hose onto the valve and place a 11mm wrench on the brake caliper bleeder screw.
Place your plastic bottle in a safe, secure location, above the level of the caliper bleeder valve.
Clear your grasp cylinder to stop any dust or contaminants from stepping into the fluid and probably clogging brake strains.
Utilizing a turkey baster or a large syringe, take away a number of the previous brake fluid from grasp cylinder. Don’t empty all the grasp cylinder since it’s going to introduce air into the brake system, which can must be pushed through the whole length of brake strains.
Slowly prime off the master cylinder with recent fluid and close the cap.
Relying on your state of affairs, you’ll be able to perform a two-person or a one-person brake bleeding process.
In case you do have a helper, ask them to hop into the Jeep and depress brake pedal few occasions when you function the wrench on the bleeder valve and observe the fluid flowing through the hose.
In this instance I performed a one-person bleeding process. It means you do both the brake pedal depressing and checking the fluid popping out of the caliper and flowing through the hose, as well as making sure the grasp cylinder in being topped off with recent brake fluid.
Open the bleeder valve with the 11mm wrench. Turn the valve screw solely about 1/four of a flip, since loosening it too much will trigger the brake fluid to leak out and air to return through which defeats the purpose of bleeding the strains.
Depart the bleeder valve open, get behind the wheel of your Jeep and depress brake pedal five occasions. Get out and examine the fluid going through the hose. Previous fluid shall be actually dark and there shall be air being pushed out.
Hold depressing the brake pedal five occasions directly, return and make it possible for master cylinder is refilled (it is rather essential to NOT let your master cylinder run dry throughout this process), and verify if the fluid flowing through the hose becomes clearer, with no air pockets.
As soon as the fluid coming out of the caliper and through the hose is obvious and there’s no air bubbles, you’ll be able to shut and tighten the caliper bleeder valve.
You’ll be able to disconnect your bleeder package and put the rubber cap again on the bleeder valve. Verify to ensure there isn’t a leaks from the banjo bolt. Tighten the bolt if essential.
Passenger aspect rear brake is the farthest from grasp cylinder, subsequently it should take the longest to push recent fluid through the strains.
Driver aspect rear brake ought to take a bit less time to flush and bleed.
When you end bleeding both rear brakes, you possibly can put the wheels again on and lower your Jeep to the bottom. I might advocate doing a fast check drive to ensure the whole lot works appropriately, before shifting on to the entrance brakes.
Park on a good floor and chock the rear wheels. Carry the entrance axle and relaxation it on a minimum of two jack stands. Remove both wheels.
Entrance inventory flex brake line in hooked up to a bracket, situated between the shock and coil spring. I might recommend uninstalling the bracket and transferring the whole brake line to the other aspect of the shock. Meaning the shock’s backside bolt needs to be eliminated and brake line must go around backside of the shock.
Take away the bracket’s 10mm bolt.
Remove the nut from shock’s backside bolt, using an 18mm socket and 18mm wrench to keep the bolt from spinning.
You need to use a 1″ large ratcheting strap to keep the shock from absolutely extending as soon as faraway from lower mounting bracket, which can help with re-installing backside bracket bolt whenever you’re accomplished shifting the brake line.
Remove the brake line bracket, ranging from the bolt aspect, and switch the whole brake line meeting to the other aspect of the shock, rigorously going across the backside of the shock.
Align the shock back into mounting bracket and install the bolt.
Disconnect the ABS line from brake line.
Loosen the 12mm flare fitting connecting flex line and bracket to the strong brake line. Remove the 10mm bracket bolt.
Disconnect inventory flex line from strong line utterly.
After disconnecting the inventory flex line, join your new prolonged flex line immediately and carry the opposite end of it as excessive as attainable.
Your new flex line goes through the new L-shape bracket and connects to the flare becoming. Align all the things and tighten the 12mm fitting, while holding the new bottom nut with an 18mm open end wrench.
Place a drain pan beneath the entrance brake caliper.
Rigorously unscrew the banjo bolt. I might recommend utilizing a 15mm flare nut wrench with a purpose to forestall injury to the bolt.
Let the fluid drain out of the flex line and brake caliper.
Clear the banjo bolt with brake cleaner and install new copper crush washers as pictured.
Join the other end of your new, prolonged flex brake line to the brake caliper (make certain brake line just isn’t twisted). Catch the banjo bolt by hand to stop cross threading, and tighten to 23 ft. lbs.
Choose greatest orientation of the elbow coming from the banjo bolt. You may want it to level in the direction of the rear and up. I decided to put in it in the direction of the front and up, to align flex brake line with the ABS line better.
Push within the offered spring clip on prime of your new body bracket. Gently tap with a hammer if crucial or rigorously use a pair of tongue and groove pliers.
Tighten the body bracket’s 10mm bolt. With every little thing tighten and spring clip in place, the connection ought to feel strong and secure.
Connect the ABS line to brake line with a zipper tie.
You’ll be able to optionally set up the TeraFlex JK Entrance Brake Line Anchors, as I made a decision to do. It’s versatile in all directions so it doesn’t prohibit brake line motion while offroading.
Set up the brake line anchor onto the decrease shock bolt and tighten the nut to 56 ft. lbs.
Push the ABS line and brake line into the anchor and safe with three zip ties. Connect both strains along with few zip ties as properly.
You at the moment are prepared to begin the flushing and bleeding process for the passenger aspect front brake.
Remove the rubber cap hooked up to the brake caliper bleeder valve. Push the hose onto the valve (you may need to minimize off half″ of the hose to ensure the top is tight) and place a 11mm wrench on the brake caliper bleeder screw.
Place your plastic bottle in a safe, secure location, above the extent of the caliper bleeder valve.
Open the bleeder valve with the 11mm wrench. Flip the valve screw solely about 1/four of a flip.
Depart the bleeder valve open, get behind the wheel of your Jeep and depress brake pedal 5 occasions. Get out and verify the fluid going through the hose. Previous fluid might be really dark and there can be air being pushed out.
Hold depressing the brake pedal 5 occasions directly, go back and ensure that grasp cylinder is refilled (it is rather necessary to NOT let your grasp cylinder run dry during this course of), and examine if the fluid flowing through the hose becomes clearer, with no air pockets.
As soon as the fluid popping out of the caliper and through the hose is obvious and there’s no air bubbles, you possibly can close and tighten the caliper bleeder valve.
You possibly can disconnect your bleeder package and put the rubber cap back on the bleeder valve. Examine to ensure there isn’t a leaks from the banjo bolt. Tighten the bolt if needed.
Repeat similar steps with the driving force aspect brake strains, as well as flushing and bleeding procedure.
Once you finish bleeding each front brakes, you’ll be able to put the wheels back on and decrease your Jeep to the ground. Do a quick check drive to ensure every little thing works appropriately (brake pedal should really feel agency, and there ought to be no leaks at any connection factors – maintain checking the subsequent few days).
Congratulations, you now have model new prolonged brake strains, and recent fluid flowing through your Jeep’s braking system.
In case you have any questions or ideas, be happy to comment under.
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