95 Dual diaphram booster/master cylinder upgrade - Page 5 - JeepForum.com

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post #61 of 69 Old 09-19-2013, 09:46 AM
Que89YJ
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Luuca, I just sent a PM to Moderator to add it.

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post #62 of 69 Old 04-03-2015, 09:02 AM
mooncruiser
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Excellent write up, this is the way it's done! Great pics and showing part numbers, thank you!

93 YJ - 2.5 5spd, NP231 tcase, SYE, CV driveshaft 7"slip spicer, 2.5" Old MAn Emu 36r's all 4 corners, Bilstein 5100's, 4.10 f & r , Posi-Lock front axle, Tuffy boxes, MM winch.
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post #63 of 69 Old 08-24-2015, 10:48 PM
baritone_mike
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Quote:
Originally Posted by 5.7YJ View Post
Due to the master cylinder having bubble type fittings, I purchased adapters for the master cylinder. The fittings you will need are Edelmann #265000 and #271300. They both adapt to standard 3/16 brake line fittings.
How did you stop the 265000 from leaking? The other three fitting work fine, but I have tried two different 265000 fitting and they both leak between the fitting and the master cylinder.

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post #64 of 69 Old 08-27-2015, 06:30 PM
baritone_mike
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Took the old master back and got another one, this one does not leak.

Just got back from the inaugural drive with the new system, it stops much much better. My only complaint is that the pedal is less firm than the old one was, the Jeep stops wonderfully and is completely derivable, the pedal is just a little soft. It is not like it goes to the floor or anything like that, just before my pedal was solid as a rock.

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post #65 of 69 Old 08-27-2015, 08:54 PM
mikeyd99
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I put on a used 95 yj dual diaphragm booster with a used tj master cylinder. My brakes are better but my pedal is way softer than it was as stock. My brakes are bled correctly
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post #66 of 69 Old 08-27-2015, 10:58 PM
baritone_mike
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I was expecting it to be a little softer, bigger booster means a softer pedal. I was just a little shocked by how soft it is, I have been driving it around a little more and am starting to get used to it. With the Jeep off the pedal gets nice and hard like it should, so everything is bleed correctly.

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post #67 of 69 Old 08-28-2015, 06:24 AM
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Quote:
Originally Posted by baritone_mike View Post
I was expecting it to be a little softer, bigger booster means a softer pedal. I was just a little shocked by how soft it is, I have been driving it around a little more and am starting to get used to it. With the Jeep off the pedal gets nice and hard like it should, so everything is bleed correctly.
It may not be. You may still have some air in the system. If you do I'm willing to be its in the master cylinder. Sometimes you really got to work to bench bleed all of the air out. Making sure it is level is crucial. You cant bench bleed on the vehicle because it does not sit level. Try bench bleeding the master again. Your pedal may firm up. Or adjust the rear drums.

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post #68 of 69 Old 08-28-2015, 07:43 AM
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If you are sure all the air is out of the system it also could be the bolt in between the master and the booster.
You may need to adjust the length.
The way I did mine was on a driveway with a small incline.
I ran the bolt out until the brakes were dragging, which you can tell by putting the Jeep in Neutral and letting it roll.
Then keep adusting it untill the Jeep rolls without any resistance.

93 YJ SOA 2" springs front, XJ springs rear w/main leaf added, High pinon 9 inch rear detroit locker front Dana 44 ARB 4.56 Gears, 36 inch Irok tires too much to list. www.mijc.org
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post #69 of 69 Old 08-28-2015, 09:48 PM
baritone_mike
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Quote:
Originally Posted by 87TPIYJ View Post
It may not be. You may still have some air in the system. If you do I'm willing to be its in the master cylinder. Sometimes you really got to work to bench bleed all of the air out. Making sure it is level is crucial. You cant bench bleed on the vehicle because it does not sit level. Try bench bleeding the master again. Your pedal may firm up. Or adjust the rear drums.
Well that sucks, and I thought I was being clever by doing that. I made sure to get all of the bubbles out of the master with it attached to the Jeep.

The Jeep locks the tires up just fine at about 15 mph, it is just the first inch or so of pedal if very soft. I may try to adjust the booster rod.

EDIT:

Just adjusted the booster rod, jeep still rolls freely due to the slope on my garage floor and the pedal feels like I expected it to. I think I got lucky bleeding the master on the Jeep and managed to get all of the air out of the system.

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