Author Topic: selfadjusting nightmerries  (Read 4075 times)

Offline Belgium Cuda

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selfadjusting nightmerries
« on: January 24, 2008 - 02:12:49 PM »

 The Cuda has all new brakeparts from pedal to brakeshoe. Everything mounted, adjusted and the drum turns good around but after driving 10
minutes the left rear get stucked. I have removed and mounted everything several times but always the same result. The selfadjusting schrew adjusts itself
to much so the drum get stucked. What do I do wrong?  :bricks1:
1970 Challenger Convertible - to become a Hemi tribute
1968 Charger R/T 500 cui stroker




Offline duodec

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Re: selfadjusting nightmerries
« Reply #1 on: January 25, 2008 - 01:27:24 AM »
Are those 11" drums?

The service manual images I have do show a few differences from what you have set up.

The anti-rattle spring on the strut just below the wheel cylinder appears to be backwards; the tab/tail of the spring should be against the tab of the shoe right below the wheel cylinder piston, on the outside of the strut.

The spring running from the stud the anchor plate is on to the rear shoe should be on top ofthe spring running to the front shoe.  Could it be interfering with the adjusting cable?  Order of items over/around the stud should be shoes, then anchor plate, then adjuster cable, then front spring, then rear spring.

The end of the adjusting cable, where it hooks to the adjusting lever is wrong; the hook goes in from behind the lever, as you have, but that rectangular frame should be outside of the adjusting lever.  The lever is 'captured' between the spring hook in the back, and the metal frame on the outside.

I'm not sure any of these could cause the problem you are seeing though.

Offline quagmire

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Re: selfadjusting nightmerries
« Reply #2 on: January 25, 2008 - 02:10:40 AM »
One other thing to check is to make sure you have the self adjusters on the correct sides of the car.  They are different for left and right sides and will be marked with an L or R on the end of the screw. 

Offline Chryco Psycho

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Re: selfadjusting nightmerries
« Reply #3 on: January 25, 2008 - 03:10:26 AM »
the green spring at th ebootm is connected incorrectly for sure

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Offline Belgium Cuda

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Re: selfadjusting nightmerries
« Reply #4 on: January 25, 2008 - 11:53:59 AM »

 Thanks duodec and the rest of you, will try to modify according to your proposals and post another picture since testdriving is not an option for the moment.  :bigsmile:
1970 Challenger Convertible - to become a Hemi tribute
1968 Charger R/T 500 cui stroker

Offline Super Blue 72

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Re: selfadjusting nightmerries
« Reply #5 on: January 25, 2008 - 12:11:00 PM »
This page may be useful, I beleive this to be a Mopar set up.

http://www.dippy.org/svcman/sm05b.html

1972 Dodge Challenger Rallye 340, AT, Code TB3=Super Blue, SBD=8/17/1971.  Yes, a Rallye without the fender louvers from the factory because of the body side molding option.

Pic #2 and 3 of my ARII 1/24 scale model car 

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Offline Super Blue 72

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Re: selfadjusting nightmerries
« Reply #6 on: January 25, 2008 - 12:19:39 PM »

The end of the adjusting cable, where it hooks to the adjusting lever is wrong; the hook goes in from behind the lever, as you have, but that rectangular frame should be outside of the adjusting lever.  The lever is 'captured' between the spring hook in the back, and the metal frame on the outside.


 :iagree:  This looks potentially interesting because if the frame is sandwiched between the spring hook and the metal frame, won't this basically adjust the brakes everytime you hit the pedal?

You can experiment by having the rear of the car up on jack stands, adjust the brakes to where the wheel spins freely then pump the brakes and see if the wheel seizes up after cintinued pumping, then reposition the parts as duodec mentioned, then repeat to see if the wheel locks up again.  :dunno:
1972 Dodge Challenger Rallye 340, AT, Code TB3=Super Blue, SBD=8/17/1971.  Yes, a Rallye without the fender louvers from the factory because of the body side molding option.

Pic #2 and 3 of my ARII 1/24 scale model car 

Phil in New England-Massachusetts  Always thank God for what you have!

http://www.cardomain.com/ride/456046/1972-dodge-challenger

Offline HP2

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Re: selfadjusting nightmerries
« Reply #7 on: January 25, 2008 - 12:29:14 PM »
The brake shoes are on backwards too. The long pad goes on the front.

The self adjuster arm should be on the back side of the star wheel so that it only ratchets up when you step on the brakes going backwards. They way you have it on now allows it to ratchet up every time you step on the brakes.

Offline RUSTY Cuda

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Re: selfadjusting nightmerries
« Reply #8 on: January 25, 2008 - 12:32:02 PM »
No expert here but a pic is wort a thousand words, here's my 10" tried to follow the manuel. Rich.

Offline Chryco Psycho

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Re: selfadjusting nightmerries
« Reply #9 on: January 25, 2008 - 12:54:56 PM »
The brake shoes are on backwards too. The long pad goes on the front.

The self adjuster arm should be on the back side of the star wheel so that it only ratchets up when you step on the brakes going backwards. They way you have it on now allows it to ratchet up every time you step on the brakes.

 I hate to disagree but the Long shoe is Always on the rear if yours are on the front reverse them

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Offline Belgium Cuda

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Re: selfadjusting nightmerries
« Reply #10 on: January 25, 2008 - 02:22:41 PM »
No expert here but a pic is wort a thousand words, here's my 10" tried to follow the manuel. Rich.

 You are so right, I'm getting moore and moore confused :banghead:
 Seems that 10" is different, will try to follow the drawing above and test.
1970 Challenger Convertible - to become a Hemi tribute
1968 Charger R/T 500 cui stroker

Offline Chryco Psycho

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Re: selfadjusting nightmerries
« Reply #11 on: January 25, 2008 - 02:43:50 PM »
10 & 11 are different which are yours , they look like 10 " to me

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Offline Belgium Cuda

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Re: selfadjusting nightmerries
« Reply #12 on: January 25, 2008 - 04:28:44 PM »

 Just messured, it's the 11" type. On the Charger it's 10" otherwise I could have compared with that one.
1970 Challenger Convertible - to become a Hemi tribute
1968 Charger R/T 500 cui stroker

Offline Chryco Psycho

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Re: selfadjusting nightmerries
« Reply #13 on: January 26, 2008 - 02:29:56 AM »
then your springs are on correctly other than the spring on the park brake actuater link being upside down

Challenger - You`ll wish You Hadn`t

Offline ShelbyDogg

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Re: selfadjusting nightmerries
« Reply #14 on: January 26, 2008 - 05:48:53 AM »
Belgium,     The BIG (primary) shoe ALWAYS mounts on the rear. Yours is right
If the adjusters were put on the wrong sides, the brakes loosen themselves as you drive, not tighten.

1. See if it is a pressure problem; Drive the car, get the rear drum stuck, then quickly jack up the rear and loosen the bleeder screw and see it the wheel freely turns after releasing any pressure. If it was a pressure problem, BOTH rears would stick unless the right side is blocked though.
2. make sure that your parking brake cable isn't sticking a little
3. I think that you have your brakes adjusted a little too tight and you are just dealing with thermal expansion. loosen the adjuster a little.

Rob
Rob

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