Grant Posted November 18, 2009 Share Posted November 18, 2009 I am looking at the e brake cables on my comanche and the cables enter the backing plate from the rear? Is this normal? I don't see how they could have been taken off and reversed. Also, Is there a source for the suspension activated porportioniong valve and bracket? Thanks Grant 86 Comanche 2.5l 4x4 :USAflag: Link to comment Share on other sites More sharing options...
Wildman Posted November 19, 2009 Share Posted November 19, 2009 If you have a D35 for a rear axle, the parking brake cables should enter the backing plate from the front, Unless.......you have something else for an axle :hmm: The only source for the rear height proportioning valve is here - viewtopic.php?f=4&t=19661 They have not been made since 1992, and parts are long gone for 're-building' the valve, most of us, just remove the valve and run one rear line to the rear brakes. Link to comment Share on other sites More sharing options...
Eagle Posted November 19, 2009 Share Posted November 19, 2009 I am looking at the e brake cables on my comanche and the cables enter the backing plate from the rear? Is this normal? Seems to be normal for the longbeds, but the opposite for the shortbeds. I can't explain why. Doesn't make any sense whatsoever. Link to comment Share on other sites More sharing options...
HOrnbrod Posted November 19, 2009 Share Posted November 19, 2009 Hmmm. Before I swapped the rear disk brakes in, my 91 LWB ebrake cables entered from the front. They still do. Must have been a backing plate design change between 86 and 91. :hmm: Link to comment Share on other sites More sharing options...
Wildman Posted November 19, 2009 Share Posted November 19, 2009 Yea, I'm sure the parking brake cables enters the front of the backing plate on the SWB and LWB D35's :hmm: Guest I'm going to craw under a couple tomorrow at the shop to double check this.......and I just happen to have a '86 sitting some where over there...... Link to comment Share on other sites More sharing options...
Grant Posted November 19, 2009 Author Share Posted November 19, 2009 So I should just cut the porportioning valve out of the system and put in a conventional y block for the brake lines? I'm going to change all the lines this week. any recomendations? I'm sure that the past owner didnt mess with the rear brakes but thast only accounts for the past 12 years. weird to see cables looping around to the back od the brakes! Link to comment Share on other sites More sharing options...
HOrnbrod Posted November 19, 2009 Share Posted November 19, 2009 I like my load sensing valve and have retained it since it's still doing it's job, but in your case (an 86 MJ in MA), I'd recommend plumbing it out of the system since you're replacing all the brake lines. It's on the edge of reliability, if not past............ Link to comment Share on other sites More sharing options...
Eagle Posted November 19, 2009 Share Posted November 19, 2009 So I should just cut the porportioning valve out of the system and put in a conventional y block for the brake lines? I'm going to change all the lines this week. any recomendations? What do you mean by a "conventional y block"? A Cherokee proportioning valve? IMHO that's just exchanging one problem for another. The Cherokee proportioning valve is known for gumming up and causing you to have no rear brakes. All I did when I eliminated my height-sensing valve was to plug the bypass outlet on the MJ front metering block and run a single hard line to the rear flex hose. Simple. Rear brakes are a good thing. Especially when you haven't had any for awhile. Link to comment Share on other sites More sharing options...
1986Comanche Posted November 19, 2009 Share Posted November 19, 2009 I am looking at the e brake cables on my comanche and the cables enter the backing plate from the rear? Is this normal? I don't see how they could have been taken off and reversed. Also, Is there a source for the suspension activated porportioniong valve and bracket? Thanks Grant 86 Comanche 2.5l 4x4 :USAflag: I went through this same issue with my 1986 Comanche. I believe this is a 1986 Comanche thing only. All 1986 Comanches are longbeds. The Shortbed didn't come out until 1987. I don't think this has anything to do with the truck being a shortbed or a longbed. The 1987 and up Comanches have the cables going into the backing plates from the front. I have two 1986 Comanches, one that I drive and one for parts. The parking brake cables on both of them go into the backing plates from the rear. This makes the rear brakes completely opposite of all the others. The parking brake arms inside the drums are on the front side of the drum instead of the rear side. All the brake parts like the adjusters and the brake adjusting levers are marked with either an L or an R. The adjuster and adjusting lever marked with an L is supposed to be for the drivers side, but instead is on passenger side on the 1986 Comanches, so of course the adjuster and adjusting arm marked with an R goes on the drivers side on the 1986 Comanches instead of the passenger side like it is supposed to. You have to know this when getting parts. None of the auto parts have this correct on their computers when you look up brake parts for a 1986 Comanche. The adjusting cables inside the drum are also opposite they are on the front side of the drum instead of the rear side where they are on all other drum brakes I've seen. I hope this info helps. Link to comment Share on other sites More sharing options...
Wildman Posted November 19, 2009 Share Posted November 19, 2009 Grant - Check out this topic first, there's some info on the combo valve for you - http://comancheclub.com/forums/viewtopic.php?t=4917 Swapping in a XJ Porp valve is not a total solution. Using the OEM MJ combo valve is the correct answer, by plugging the lower front outlet, the front "nose" outlet is the main service line to the rear brakes. I've used the "T" from the rear, and connect both of the line together at the combo valve (can't find the picture now) near the master cyl. And........I'll be check out MJ's this morning for the parking brake lines..... ;) But........I think.........1986Comanche is going to be getting a Gold star on this one :D Link to comment Share on other sites More sharing options...
possum Posted November 19, 2009 Share Posted November 19, 2009 My E-brake cables also enter from the rear of the backing plates on my 86'. Link to comment Share on other sites More sharing options...
Wildman Posted November 20, 2009 Share Posted November 20, 2009 So........in the pouring rain today..........But, I had fun checking the fleet over :D I did check the lwb, the swb, and the '86 and................. Give 1986Comanche the Gold MJ badge :yes: And possum is correct too. The parking brake cables indeed enter the backing plate from the rear. All other models and years the cables enter from the front. Another reason to stay away from the '86 model year :doh: So, I'll make note of this for future reference :typing: Link to comment Share on other sites More sharing options...
Grant Posted November 20, 2009 Author Share Posted November 20, 2009 That cool so my ebrakes are not a freak! yeah I'm contemplating changing all my steel brake lines with SS. what size tubing? and recomendation on the process? I'll do the ss hoses to the wheel cyls and calipers as well. Link to comment Share on other sites More sharing options...
Wildman Posted November 21, 2009 Share Posted November 21, 2009 All the steel brake lines on the MJ are 3/16" The most important step on doing your own brake lines is, Double Flare !!!! Every connection. Most of the the line fitting are 3/8" X 3/16" hollow nuts (shorts). There are one or 2 "odd" fittings at the distribution valve (near master cyl) which you can re-use. This place is around the corner from me, and the at one time carried XJ brake lines, which would do the front for the most part. http://www.classictube.com/index.asp They also sell stock and accessories. Link to comment Share on other sites More sharing options...
Grant Posted November 21, 2009 Author Share Posted November 21, 2009 awesome, thanks Link to comment Share on other sites More sharing options...
Grant Posted November 23, 2009 Author Share Posted November 23, 2009 I picked up a cherokee porp valve today. I am looking for some sort of diagram as to what line goes where. the "new to me" porp valve has 5 line openings. I assume that the top 2, on either side of the the presure sensing electric sender, are from the master. The rearward facing one is the right front. That would make the rear bottom one the left front and the bottom front goes to the rear, now brake hose, where I'm iliminating the hight porp valve??? Link to comment Share on other sites More sharing options...
Pete M Posted November 24, 2009 Share Posted November 24, 2009 the bottom one is the emergency line. note that I made that mistake already when I eliminated that line from my truck. :shake: Link to comment Share on other sites More sharing options...
Grant Posted November 24, 2009 Author Share Posted November 24, 2009 Is that the stock MJ valve? Here is the xj valve I aquired today. Ar my markings good? I'm sure about the right front , I traced it. What is the best line to run? I don't want to do just regular brake line. I hear NAPA has sometinh new that is virtually indestructable. Link to comment Share on other sites More sharing options...
Grant Posted November 25, 2009 Author Share Posted November 25, 2009 is the above a correct drawing of the cherokee porp as used in a comanche? Thanks Link to comment Share on other sites More sharing options...
Pete M Posted November 25, 2009 Share Posted November 25, 2009 I believe so. my photo is of a stock MJ unit. Link to comment Share on other sites More sharing options...
Grant Posted December 2, 2009 Author Share Posted December 2, 2009 I found some cool stuff! *******Factory parts lists in pdf"s for 80-86 and 88-90 including MJ's******** Height valve parts list http://www.massachusettsflagger.com/mj/HV.jpg Parts 80 -86 http://www.massachusettsflagger.com/mj/Jeep80.pdf parts 88-90 http://www.massachusettsflagger.com/mj/Jeep88.pdf Link to comment Share on other sites More sharing options...
Grant Posted December 3, 2009 Author Share Posted December 3, 2009 The rear hight sensing porportioning valve is out, hanger bracker and axle barcket too! The new/old cherokee porp all cleaned inside and out. ready to go. New coated lines in the rear with new hose. now for the long run to the front. If anybody wants it let me know. Link to comment Share on other sites More sharing options...
Grant Posted December 3, 2009 Author Share Posted December 3, 2009 p.s. with just lung powered air pressure, I don't see any pressure difference in the old rear valve. Mignt not be enough, or may need fluid to work. could be junk too! Link to comment Share on other sites More sharing options...
1986Comanche Posted December 3, 2009 Share Posted December 3, 2009 The rear hight sensing porportioning valve is out, hanger bracker and axle barcket too!The new/old cherokee porp all cleaned inside and out. ready to go. New coated lines in the rear with new hose. now for the long run to the front. If anybody wants it let me know. Grant, I sent you a private message. Thanks Link to comment Share on other sites More sharing options...
Grant Posted December 16, 2009 Author Share Posted December 16, 2009 new brakes are awesome. all new coated lines, no more ride hight porp valve, used 89xj porp. replaced clutch master and slave, new line for it too. all i need now is ahte ambassador paint job now! still have the old rear porp valve above is anybodys interested. Link to comment Share on other sites More sharing options...
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