How to bleed cutting brakes?

[Ganzo]

Hey guys whats up? So i was wondering what you guys do to bleed your cutting brakes? I have the jamar cutting brake that i put in my baja but could bleed it properly. Any suggestions? Thanks 

 

[Superdaveaz]

This is what I do:

Push down the brake pedal and then push and hold the cutting brake lever.

Purge the air from the caliper.

close the bleeder but continue to hold the cutting brake.

release the pedal but not the cutting brake.

pump the pedal slowly, allowing the cutting brake to return but with hand pressure against it until the pedal pumping has pushed the cutting brake handle back to neutral.

start process all over again.

 

[SANDFORME]

This is what I do:

Push down the brake pedal and then push and hold the cutting brake lever.

Purge the air from the caliper.

close the bleeder but continue to hold the cutting brake.

release the pedal but not the cutting brake.

pump the pedal slowly, allowing the cutting brake to return but with hand pressure against it until the pedal pumping has pushed the cutting brake handle back to neutral.

start process all over again.

What he said   :thumb:

 

[ChasingSand]

or use a pressure bleeder. That had the best results for me.

 

[Rockwood]

If your brake lines have an upside down U anywhere in them, raise the MC or caliper above everything (jack up the front, or disconnect the calipers, put a spacer for the pads to squeeze) and bleed that way.  The small MCs we generally use won't displace enough fluid to fully push a bubble out of a trap in the line, so the bubble just walks back and forth and never leaves.

Or just use a power bleeder. :biggrin:

 

[Rockwood]

BTW, the upside down U includes the turning brakes themselves. If they’re the high point, be prepared for much frustration. 

 

[Ganzo]

This is what I do:

Push down the brake pedal and then push and hold the cutting brake lever.

Purge the air from the caliper.

close the bleeder but continue to hold the cutting brake.

release the pedal but not the cutting brake.

pump the pedal slowly, allowing the cutting brake to return but with hand pressure against it until the pedal pumping has pushed the cutting brake handle back to neutral.

start process all over again.

Ok so i will try this and if this doesnt work out i will get a pressure bleeder. Thanks guys

 

[dunenigma]

I've even had problems with a pressure bleeder. Make sure your turn brake housing is at least level or uphill to the bleeder screws, and you only need a lb or two of pressure.

 

[dunenigma]

You don't by chance have an 05 ish DD car do you ?.

 

[Ganzo]

You don't by chance have an 05 ish DD car do you ?.

Me? No sir

 

[dunenigma]

Just curious. Mine had the trailing arm plates welded backwards or wrong. Meaning the caliper bracket mount was off by a 1/2". Once I realized the issue and fixed it I never had a brake pad or bleeder issue ever again. And my brakes were awesome !.

 

[Ganzo]

update, my brakes still suck, have not gotten my cutting brake to work. I repositioned the cutting brake and the bleeder of the lever is now the highest point in the brake system.

 

[JM PRO]

Getting the air out of the system can be a total Beotch. I have battled this on a couple cars after adding turn brakes. Traditional bleeding will never work.

You need to use a pressure bleeder. I drilled my cap and installed a fitting that installs to the pressure bleeder I built. I add roughly a gallon of brake fluid to the pressure bleeder.

The key to success is to move as much fluid as possible. I disconnect both brake lines from the calipers in the rear and place them into a bottle. I then turn on the pressure bleeder and let the fluid flow and turn the air pressure up to roughly 30PSI. Fluid will be spraying out of the brake lines with a good amount of volume. As the fluid is flowing, tap on the turn brake with a hammer to help dislodge any possible trapped air and you can pump the handles a few times. After you run a 1/2 gallon or so of brake fluid thru your system, shut off the air pressure and reconnect brake lines. Open up caliper bleeders and turn the pressure back on. Tap the calipers with a hammer while you push another 1/4 gallon thru the system. Front calipers are easy to bleed, no need to disconnect the brake lines, just turn on pressure bleeder on and tap the calipers with a hammer.

I am located in Placentia and you are more than welcome to borrow my pressure bleeder and my master cylinder cap. I have a cap for both a Jamar and a CNC.

 

[Jtmoney714]

While pressure bleeding I’ve also had to simultaneously have someone press the pedal like the standard way of bleeding.