Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Ranger789 on March 18, 2014, 02:29:42 PM

Title: 1980 CJ7 Brakes
Post by: Ranger789 on March 18, 2014, 02:29:42 PM

I have decided to replace the complete servo and master cylinder unit on the CJ as it hasn't operated in at least 6 years and looks well past its sell by date. I am considering getting a full unit from the US but notice that the push rod hinge pin is at the bottom on the US units and at the top on mine. Also the unit overall is some 4" longer. Does anyone have any experience of fitting these units? Any help appreciated. Thanks. :017:

Title: Re: 1980 CJ7 Brakes
Post by: Dave69 on March 18, 2014, 08:48:34 PM

a YJ servo/master cylinder is considered an upgrade. plenty of info in tinterweb

Title: Re: 1980 CJ7 Brakes
Post by: Ranger789 on March 19, 2014, 01:47:04 PM

Thanks for that. I will do some more research.

Title: Re: 1980 CJ7 Brakes
Post by: WillCJ on March 20, 2014, 10:19:43 PM

Quote from: Ranger789 on March 18, 2014, 02:29:42 PM

I have decided to replace the complete servo and master cylinder unit on the CJ as it hasn't operated in at least 6 years and looks well past its sell by date. I am considering getting a full unit from the US but notice that the push rod hinge pin is at the bottom on the US units and at the top on mine. Also the unit overall is some 4" longer. Does anyone have any experience of fitting these units? Any help appreciated. Thanks. :017:

I have the Rough Trail one on my '83, fit fine and made all the difference on 33's.
 Took a bit of setting up to get the pedal to feel right, there is also an adjustment between the diaphram unit and the master cylinder, spoke the manufacture in Arizona (I think), very helpfull.
 I actually extended the pedal rod a bit, but I am running auto box, and rear discs. The brakes are actually even better since I switched from the 4.2 to AMC 360, must be more vacuum!

Title: Re: 1980 CJ7 Brakes
Post by: Ranger789 on March 25, 2014, 02:02:59 PM

Thanks for that. Did you leave the pivot pin on bottom or change to top. Can't quite tell from photo.
Thanks again.

Title: Re: 1980 CJ7 Brakes
Post by: Bulldog67 on March 25, 2014, 06:47:09 PM

Is this any good: http://www.ifsja.org/forums/vb/showthread.php?t=106056

I got the set up for the Chief and it locks the wheels up on 35s without any bother at all, whereas previously stopping was something you planned a week or so in advance

Title: Re: 1980 CJ7 Brakes
Post by: wildwood on March 25, 2014, 07:00:58 PM

Bloody hell Ade your going to excel yourself with info like that........


I was so impressed I had to bookmark it and sit down for a Tea :hysterical:

Title: Re: 1980 CJ7 Brakes
Post by: Bulldog67 on March 25, 2014, 07:13:49 PM

I is a guru innit  :icon_super:

Title: Re: 1980 CJ7 Brakes
Post by: Lornaben on March 25, 2014, 07:23:10 PM

OK, who has hacked BD's account ?